./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/10_fmaxsym_cas.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-ext/10_fmaxsym_cas.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 a11d0cba01cb66911cac56797cb36d325dc008752ffb55c25c965bd0644c21c3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:02:53,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:02:53,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:02:53,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:02:53,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:02:53,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:02:53,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:02:53,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:02:53,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:02:53,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:02:53,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:02:53,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:02:53,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:02:53,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:02:53,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:02:53,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:02:53,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:02:53,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:02:53,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:02:53,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:02:53,401 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:02:53,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:02:53,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:02:53,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:02:53,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:02:53,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:02:53,407 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:02:53,407 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:02:53,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:02:53,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:02:53,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:02:53,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:02:53,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:02:53,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:02:53,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:02:53,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:02:53,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:02:53,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:02:53,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:02:53,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:02:53,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:02:53,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:02:53,417 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:02:53,442 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:02:53,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:02:53,443 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:02:53,443 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:02:53,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:02:53,444 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:02:53,445 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:02:53,445 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:02:53,445 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:02:53,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:02:53,446 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:02:53,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:02:53,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:02:53,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:02:53,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:02:53,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:02:53,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:02:53,447 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:02:53,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:02:53,448 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:02:53,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:02:53,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:02:53,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:02:53,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:02:53,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:02:53,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:02:53,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:02:53,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:02:53,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:02:53,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:02:53,450 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:02:53,451 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:02:53,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:02:53,451 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a11d0cba01cb66911cac56797cb36d325dc008752ffb55c25c965bd0644c21c3 [2022-07-19 21:02:53,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:02:53,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:02:53,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:02:53,680 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:02:53,681 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:02:53,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/10_fmaxsym_cas.i [2022-07-19 21:02:53,741 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc7553e35/ade938233e1241fb96d8d34280f1bc1d/FLAGb69e847af [2022-07-19 21:02:54,136 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:02:54,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/10_fmaxsym_cas.i [2022-07-19 21:02:54,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc7553e35/ade938233e1241fb96d8d34280f1bc1d/FLAGb69e847af [2022-07-19 21:02:54,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc7553e35/ade938233e1241fb96d8d34280f1bc1d [2022-07-19 21:02:54,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:02:54,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:02:54,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:02:54,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:02:54,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:02:54,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:02:54" (1/1) ... [2022-07-19 21:02:54,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a3f6974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:54, skipping insertion in model container [2022-07-19 21:02:54,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:02:54" (1/1) ... [2022-07-19 21:02:54,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:02:54,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:02:54,448 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-ext/10_fmaxsym_cas.i[30467,30480] [2022-07-19 21:02:54,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:02:54,464 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:02:54,498 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-ext/10_fmaxsym_cas.i[30467,30480] [2022-07-19 21:02:54,508 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:02:54,541 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:02:54,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:54 WrapperNode [2022-07-19 21:02:54,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:02:54,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:02:54,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:02:54,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:02:54,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:54" (1/1) ... [2022-07-19 21:02:54,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:54" (1/1) ... [2022-07-19 21:02:54,600 INFO L137 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2022-07-19 21:02:54,600 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:02:54,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:02:54,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:02:54,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:02:54,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:54" (1/1) ... [2022-07-19 21:02:54,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:54" (1/1) ... [2022-07-19 21:02:54,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:54" (1/1) ... [2022-07-19 21:02:54,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:54" (1/1) ... [2022-07-19 21:02:54,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:54" (1/1) ... [2022-07-19 21:02:54,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:54" (1/1) ... [2022-07-19 21:02:54,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:54" (1/1) ... [2022-07-19 21:02:54,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:02:54,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:02:54,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:02:54,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:02:54,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:54" (1/1) ... [2022-07-19 21:02:54,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:02:54,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:02:54,681 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 21:02:54,687 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 21:02:54,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:02:54,708 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-19 21:02:54,708 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-19 21:02:54,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:02:54,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:02:54,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:02:54,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:02:54,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:02:54,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:02:54,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:02:54,710 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 21:02:54,843 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:02:54,844 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:02:55,022 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:02:55,057 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:02:55,058 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 21:02:55,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:02:55 BoogieIcfgContainer [2022-07-19 21:02:55,068 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:02:55,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:02:55,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:02:55,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:02:55,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:02:54" (1/3) ... [2022-07-19 21:02:55,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c5476b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:02:55, skipping insertion in model container [2022-07-19 21:02:55,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:02:54" (2/3) ... [2022-07-19 21:02:55,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c5476b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:02:55, skipping insertion in model container [2022-07-19 21:02:55,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:02:55" (3/3) ... [2022-07-19 21:02:55,083 INFO L111 eAbstractionObserver]: Analyzing ICFG 10_fmaxsym_cas.i [2022-07-19 21:02:55,088 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:02:55,095 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:02:55,095 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:02:55,095 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:02:55,133 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:02:55,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 96 transitions, 197 flow [2022-07-19 21:02:55,223 INFO L129 PetriNetUnfolder]: 10/107 cut-off events. [2022-07-19 21:02:55,223 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:02:55,227 INFO L84 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 107 events. 10/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 109 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2022-07-19 21:02:55,227 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 96 transitions, 197 flow [2022-07-19 21:02:55,230 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 96 transitions, 197 flow [2022-07-19 21:02:55,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:02:55,244 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@4bfc8d49, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1594a6e8 [2022-07-19 21:02:55,244 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:02:55,252 INFO L129 PetriNetUnfolder]: 2/55 cut-off events. [2022-07-19 21:02:55,253 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:02:55,253 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:02:55,254 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] [2022-07-19 21:02:55,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:02:55,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:02:55,258 INFO L85 PathProgramCache]: Analyzing trace with hash -659909704, now seen corresponding path program 1 times [2022-07-19 21:02:55,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:02:55,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226700005] [2022-07-19 21:02:55,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:02:55,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:02:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:02:55,386 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:02:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:02:55,444 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:02:55,445 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:02:55,447 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-19 21:02:55,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-19 21:02:55,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-19 21:02:55,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:02:55,450 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-19 21:02:55,456 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:02:55,456 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:02:55,509 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:02:55,521 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 142 places, 154 transitions, 320 flow [2022-07-19 21:02:55,571 INFO L129 PetriNetUnfolder]: 19/178 cut-off events. [2022-07-19 21:02:55,571 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:02:55,575 INFO L84 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 178 events. 19/178 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 342 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 127. Up to 6 conditions per place. [2022-07-19 21:02:55,575 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 154 transitions, 320 flow [2022-07-19 21:02:55,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 154 transitions, 320 flow [2022-07-19 21:02:55,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:02:55,584 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@4bfc8d49, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1594a6e8 [2022-07-19 21:02:55,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:02:55,605 INFO L129 PetriNetUnfolder]: 4/85 cut-off events. [2022-07-19 21:02:55,606 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:02:55,606 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:02:55,606 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-07-19 21:02:55,606 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-19 21:02:55,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:02:55,607 INFO L85 PathProgramCache]: Analyzing trace with hash -2016636923, now seen corresponding path program 1 times [2022-07-19 21:02:55,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:02:55,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531702084] [2022-07-19 21:02:55,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:02:55,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:02:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:02:55,655 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:02:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:02:55,672 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:02:55,673 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:02:55,673 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-19 21:02:55,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-19 21:02:55,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-19 21:02:55,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-19 21:02:55,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:02:55,674 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-19 21:02:55,674 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:02:55,675 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:02:55,704 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:02:55,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 194 places, 212 transitions, 445 flow [2022-07-19 21:02:55,760 INFO L129 PetriNetUnfolder]: 28/249 cut-off events. [2022-07-19 21:02:55,762 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:02:55,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 249 events. 28/249 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 638 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2022-07-19 21:02:55,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 212 transitions, 445 flow [2022-07-19 21:02:55,774 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 212 transitions, 445 flow [2022-07-19 21:02:55,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:02:55,779 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@4bfc8d49, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1594a6e8 [2022-07-19 21:02:55,780 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:02:55,793 INFO L129 PetriNetUnfolder]: 7/125 cut-off events. [2022-07-19 21:02:55,793 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:02:55,793 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:02:55,794 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 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 21:02:55,794 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:02:55,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:02:55,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1094663831, now seen corresponding path program 1 times [2022-07-19 21:02:55,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:02:55,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571288674] [2022-07-19 21:02:55,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:02:55,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:02:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:02:55,837 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:02:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:02:55,867 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:02:55,870 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:02:55,870 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-19 21:02:55,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-19 21:02:55,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-19 21:02:55,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-19 21:02:55,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-19 21:02:55,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:02:55,876 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-19 21:02:55,877 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:02:55,877 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-19 21:02:55,937 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:02:55,943 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 246 places, 270 transitions, 572 flow [2022-07-19 21:02:55,993 INFO L129 PetriNetUnfolder]: 37/320 cut-off events. [2022-07-19 21:02:55,993 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:02:55,997 INFO L84 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 320 events. 37/320 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 984 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 257. Up to 10 conditions per place. [2022-07-19 21:02:55,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 270 transitions, 572 flow [2022-07-19 21:02:56,001 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 270 transitions, 572 flow [2022-07-19 21:02:56,003 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:02:56,004 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@4bfc8d49, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1594a6e8 [2022-07-19 21:02:56,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-19 21:02:56,021 INFO L129 PetriNetUnfolder]: 12/181 cut-off events. [2022-07-19 21:02:56,022 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:02:56,022 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:02:56,022 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] [2022-07-19 21:02:56,023 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:02:56,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:02:56,023 INFO L85 PathProgramCache]: Analyzing trace with hash 379328210, now seen corresponding path program 1 times [2022-07-19 21:02:56,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:02:56,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843696606] [2022-07-19 21:02:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:02:56,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:02:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:02:56,111 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 21:02:56,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:02:56,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843696606] [2022-07-19 21:02:56,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843696606] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:02:56,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:02:56,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:02:56,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013220634] [2022-07-19 21:02:56,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:02:56,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:02:56,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:02:56,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:02:56,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:02:56,158 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 270 [2022-07-19 21:02:56,165 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 270 transitions, 572 flow. Second operand has 2 states, 2 states have (on average 237.0) internal successors, (474), 2 states have internal predecessors, (474), 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 21:02:56,165 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:02:56,165 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 270 [2022-07-19 21:02:56,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:02:56,351 INFO L129 PetriNetUnfolder]: 79/940 cut-off events. [2022-07-19 21:02:56,352 INFO L130 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2022-07-19 21:02:56,361 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1106 conditions, 940 events. 79/940 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 5255 event pairs, 34 based on Foata normal form. 188/1042 useless extension candidates. Maximal degree in co-relation 497. Up to 65 conditions per place. [2022-07-19 21:02:56,366 INFO L132 encePairwiseOnDemand]: 248/270 looper letters, 8 selfloop transitions, 0 changer transitions 0/239 dead transitions. [2022-07-19 21:02:56,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 239 transitions, 526 flow [2022-07-19 21:02:56,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:02:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:02:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 502 transitions. [2022-07-19 21:02:56,381 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9296296296296296 [2022-07-19 21:02:56,382 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 502 transitions. [2022-07-19 21:02:56,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 502 transitions. [2022-07-19 21:02:56,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:02:56,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 502 transitions. [2022-07-19 21:02:56,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 251.0) internal successors, (502), 2 states have internal predecessors, (502), 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 21:02:56,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 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 21:02:56,396 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 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 21:02:56,398 INFO L186 Difference]: Start difference. First operand has 246 places, 270 transitions, 572 flow. Second operand 2 states and 502 transitions. [2022-07-19 21:02:56,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 239 transitions, 526 flow [2022-07-19 21:02:56,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 239 transitions, 514 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-19 21:02:56,410 INFO L242 Difference]: Finished difference. Result has 237 places, 239 transitions, 498 flow [2022-07-19 21:02:56,412 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=498, PETRI_PLACES=237, PETRI_TRANSITIONS=239} [2022-07-19 21:02:56,415 INFO L279 CegarLoopForPetriNet]: 246 programPoint places, -9 predicate places. [2022-07-19 21:02:56,415 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 239 transitions, 498 flow [2022-07-19 21:02:56,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 237.0) internal successors, (474), 2 states have internal predecessors, (474), 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 21:02:56,416 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:02:56,416 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 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 21:02:56,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:02:56,417 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:02:56,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:02:56,417 INFO L85 PathProgramCache]: Analyzing trace with hash 471707768, now seen corresponding path program 1 times [2022-07-19 21:02:56,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:02:56,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694645710] [2022-07-19 21:02:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:02:56,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:02:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:02:56,453 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:02:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:02:56,484 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:02:56,484 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:02:56,485 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-19 21:02:56,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-19 21:02:56,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-19 21:02:56,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-19 21:02:56,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-19 21:02:56,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-19 21:02:56,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:02:56,486 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 21:02:56,487 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:02:56,487 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-19 21:02:56,555 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:02:56,558 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 298 places, 328 transitions, 701 flow [2022-07-19 21:02:56,606 INFO L129 PetriNetUnfolder]: 46/391 cut-off events. [2022-07-19 21:02:56,606 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-19 21:02:56,612 INFO L84 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 391 events. 46/391 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1324 event pairs, 0 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 333. Up to 12 conditions per place. [2022-07-19 21:02:56,613 INFO L82 GeneralOperation]: Start removeDead. Operand has 298 places, 328 transitions, 701 flow [2022-07-19 21:02:56,617 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 298 places, 328 transitions, 701 flow [2022-07-19 21:02:56,618 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:02:56,618 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@4bfc8d49, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1594a6e8 [2022-07-19 21:02:56,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-19 21:02:56,630 INFO L129 PetriNetUnfolder]: 13/182 cut-off events. [2022-07-19 21:02:56,631 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-19 21:02:56,631 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:02:56,631 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] [2022-07-19 21:02:56,633 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-19 21:02:56,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:02:56,633 INFO L85 PathProgramCache]: Analyzing trace with hash 281260307, now seen corresponding path program 1 times [2022-07-19 21:02:56,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:02:56,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854252208] [2022-07-19 21:02:56,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:02:56,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:02:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:02:56,688 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 21:02:56,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:02:56,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854252208] [2022-07-19 21:02:56,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854252208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:02:56,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:02:56,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:02:56,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654084955] [2022-07-19 21:02:56,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:02:56,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:02:56,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:02:56,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:02:56,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:02:56,693 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 328 [2022-07-19 21:02:56,693 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 328 transitions, 701 flow. Second operand has 2 states, 2 states have (on average 287.0) internal successors, (574), 2 states have internal predecessors, (574), 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 21:02:56,694 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:02:56,694 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 328 [2022-07-19 21:02:56,694 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:02:57,033 INFO L129 PetriNetUnfolder]: 191/1940 cut-off events. [2022-07-19 21:02:57,034 INFO L130 PetriNetUnfolder]: For 511/511 co-relation queries the response was YES. [2022-07-19 21:02:57,055 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2347 conditions, 1940 events. 191/1940 cut-off events. For 511/511 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 13903 event pairs, 98 based on Foata normal form. 491/2250 useless extension candidates. Maximal degree in co-relation 1101. Up to 161 conditions per place. [2022-07-19 21:02:57,070 INFO L132 encePairwiseOnDemand]: 301/328 looper letters, 10 selfloop transitions, 0 changer transitions 0/291 dead transitions. [2022-07-19 21:02:57,070 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 291 transitions, 647 flow [2022-07-19 21:02:57,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:02:57,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:02:57,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 609 transitions. [2022-07-19 21:02:57,072 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9283536585365854 [2022-07-19 21:02:57,072 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 609 transitions. [2022-07-19 21:02:57,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 609 transitions. [2022-07-19 21:02:57,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:02:57,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 609 transitions. [2022-07-19 21:02:57,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 304.5) internal successors, (609), 2 states have internal predecessors, (609), 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 21:02:57,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 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 21:02:57,077 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 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 21:02:57,077 INFO L186 Difference]: Start difference. First operand has 298 places, 328 transitions, 701 flow. Second operand 2 states and 609 transitions. [2022-07-19 21:02:57,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 291 transitions, 647 flow [2022-07-19 21:02:57,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 291 transitions, 627 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-19 21:02:57,089 INFO L242 Difference]: Finished difference. Result has 288 places, 291 transitions, 607 flow [2022-07-19 21:02:57,089 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=607, PETRI_PLACES=288, PETRI_TRANSITIONS=291} [2022-07-19 21:02:57,091 INFO L279 CegarLoopForPetriNet]: 298 programPoint places, -10 predicate places. [2022-07-19 21:02:57,092 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 291 transitions, 607 flow [2022-07-19 21:02:57,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 287.0) internal successors, (574), 2 states have internal predecessors, (574), 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 21:02:57,092 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:02:57,092 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] [2022-07-19 21:02:57,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:02:57,093 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-19 21:02:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:02:57,093 INFO L85 PathProgramCache]: Analyzing trace with hash 579959964, now seen corresponding path program 1 times [2022-07-19 21:02:57,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:02:57,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000331136] [2022-07-19 21:02:57,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:02:57,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:02:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:02:57,191 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 21:02:57,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:02:57,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000331136] [2022-07-19 21:02:57,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000331136] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:02:57,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:02:57,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:02:57,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070852444] [2022-07-19 21:02:57,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:02:57,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:02:57,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:02:57,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:02:57,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:02:57,195 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 328 [2022-07-19 21:02:57,196 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 291 transitions, 607 flow. Second operand has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 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 21:02:57,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:02:57,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 328 [2022-07-19 21:02:57,197 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand