./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/09_fmaxsym.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53181755-8b80-4b46-9deb-4917814e6889/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53181755-8b80-4b46-9deb-4917814e6889/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53181755-8b80-4b46-9deb-4917814e6889/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53181755-8b80-4b46-9deb-4917814e6889/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/09_fmaxsym.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53181755-8b80-4b46-9deb-4917814e6889/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53181755-8b80-4b46-9deb-4917814e6889/bin/uautomizer-ZsLfNo2U6R --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 0bf02669c3dd381b0745ab8dce392518dfe698af15c4a94bd383f1dab20a8c06 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:56:59,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:56:59,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:56:59,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:56:59,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:56:59,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:56:59,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:56:59,562 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:56:59,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:56:59,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:56:59,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:56:59,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:56:59,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:56:59,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:56:59,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:56:59,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:56:59,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:56:59,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:56:59,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:56:59,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:56:59,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:56:59,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:56:59,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:56:59,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:56:59,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:56:59,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:56:59,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:56:59,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:56:59,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:56:59,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:56:59,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:56:59,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:56:59,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:56:59,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:56:59,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:56:59,600 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:56:59,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:56:59,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:56:59,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:56:59,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:56:59,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:56:59,604 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53181755-8b80-4b46-9deb-4917814e6889/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:56:59,630 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:56:59,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:56:59,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:56:59,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:56:59,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:56:59,632 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:56:59,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:56:59,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:56:59,633 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:56:59,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:56:59,634 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:56:59,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:56:59,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:56:59,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:56:59,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:56:59,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:56:59,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:56:59,636 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:56:59,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:56:59,636 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:56:59,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:56:59,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:56:59,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:56:59,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:56:59,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:56:59,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:56:59,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:56:59,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:56:59,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:56:59,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:56:59,639 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:56:59,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:56:59,639 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:56:59,640 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:56:59,640 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53181755-8b80-4b46-9deb-4917814e6889/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53181755-8b80-4b46-9deb-4917814e6889/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bf02669c3dd381b0745ab8dce392518dfe698af15c4a94bd383f1dab20a8c06 [2022-11-25 17:56:59,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:56:59,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:56:59,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:56:59,986 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:56:59,987 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:56:59,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53181755-8b80-4b46-9deb-4917814e6889/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2022-11-25 17:57:03,168 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:57:03,597 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:57:03,598 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53181755-8b80-4b46-9deb-4917814e6889/sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2022-11-25 17:57:03,614 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53181755-8b80-4b46-9deb-4917814e6889/bin/uautomizer-ZsLfNo2U6R/data/5fe17dffa/8169295b68014ac2a0df9bfe6c387ff2/FLAG2bfde2f99 [2022-11-25 17:57:03,640 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53181755-8b80-4b46-9deb-4917814e6889/bin/uautomizer-ZsLfNo2U6R/data/5fe17dffa/8169295b68014ac2a0df9bfe6c387ff2 [2022-11-25 17:57:03,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:57:03,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:57:03,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:57:03,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:57:03,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:57:03,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:57:03" (1/1) ... [2022-11-25 17:57:03,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17e12b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:03, skipping insertion in model container [2022-11-25 17:57:03,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:57:03" (1/1) ... [2022-11-25 17:57:03,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:57:03,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:57:04,189 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53181755-8b80-4b46-9deb-4917814e6889/sv-benchmarks/c/pthread-ext/09_fmaxsym.i[30422,30435] [2022-11-25 17:57:04,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:57:04,230 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:57:04,303 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53181755-8b80-4b46-9deb-4917814e6889/sv-benchmarks/c/pthread-ext/09_fmaxsym.i[30422,30435] [2022-11-25 17:57:04,312 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:57:04,370 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:57:04,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:04 WrapperNode [2022-11-25 17:57:04,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:57:04,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:57:04,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:57:04,373 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:57:04,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:04" (1/1) ... [2022-11-25 17:57:04,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:04" (1/1) ... [2022-11-25 17:57:04,427 INFO L138 Inliner]: procedures = 171, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 77 [2022-11-25 17:57:04,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:57:04,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:57:04,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:57:04,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:57:04,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:04" (1/1) ... [2022-11-25 17:57:04,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:04" (1/1) ... [2022-11-25 17:57:04,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:04" (1/1) ... [2022-11-25 17:57:04,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:04" (1/1) ... [2022-11-25 17:57:04,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:04" (1/1) ... [2022-11-25 17:57:04,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:04" (1/1) ... [2022-11-25 17:57:04,488 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:04" (1/1) ... [2022-11-25 17:57:04,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:04" (1/1) ... [2022-11-25 17:57:04,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:57:04,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:57:04,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:57:04,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:57:04,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:04" (1/1) ... [2022-11-25 17:57:04,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:57:04,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53181755-8b80-4b46-9deb-4917814e6889/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:57:04,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53181755-8b80-4b46-9deb-4917814e6889/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:57:04,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53181755-8b80-4b46-9deb-4917814e6889/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:57:04,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:57:04,602 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-25 17:57:04,603 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-25 17:57:04,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:57:04,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:57:04,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:57:04,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:57:04,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:57:04,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:57:04,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:57:04,609 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:57:04,872 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:57:04,875 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:57:05,176 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:57:05,226 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:57:05,226 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 17:57:05,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:57:05 BoogieIcfgContainer [2022-11-25 17:57:05,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:57:05,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:57:05,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:57:05,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:57:05,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:57:03" (1/3) ... [2022-11-25 17:57:05,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44af2823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:57:05, skipping insertion in model container [2022-11-25 17:57:05,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:04" (2/3) ... [2022-11-25 17:57:05,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44af2823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:57:05, skipping insertion in model container [2022-11-25 17:57:05,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:57:05" (3/3) ... [2022-11-25 17:57:05,242 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2022-11-25 17:57:05,254 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:57:05,268 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:57:05,269 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:57:05,269 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:57:05,339 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:57:05,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 79 transitions, 163 flow [2022-11-25 17:57:05,445 INFO L130 PetriNetUnfolder]: 7/90 cut-off events. [2022-11-25 17:57:05,446 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:57:05,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 90 events. 7/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 76 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2022-11-25 17:57:05,452 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 79 transitions, 163 flow [2022-11-25 17:57:05,458 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 79 transitions, 163 flow [2022-11-25 17:57:05,463 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:57:05,493 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 79 transitions, 163 flow [2022-11-25 17:57:05,496 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 79 transitions, 163 flow [2022-11-25 17:57:05,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 79 transitions, 163 flow [2022-11-25 17:57:05,555 INFO L130 PetriNetUnfolder]: 7/90 cut-off events. [2022-11-25 17:57:05,557 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:57:05,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 90 events. 7/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 76 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2022-11-25 17:57:05,565 INFO L119 LiptonReduction]: Number of co-enabled transitions 1148 [2022-11-25 17:57:09,825 INFO L134 LiptonReduction]: Checked pairs total: 1162 [2022-11-25 17:57:09,827 INFO L136 LiptonReduction]: Total number of compositions: 84 [2022-11-25 17:57:09,858 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:57:09,867 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5a782264, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:57:09,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 17:57:09,877 INFO L130 PetriNetUnfolder]: 1/10 cut-off events. [2022-11-25 17:57:09,877 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:57:09,878 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:57:09,879 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:57:09,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:57:09,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:57:09,891 INFO L85 PathProgramCache]: Analyzing trace with hash 371744704, now seen corresponding path program 1 times [2022-11-25 17:57:09,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:57:09,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663147016] [2022-11-25 17:57:09,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:57:09,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:57:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:57:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:57:10,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:57:10,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663147016] [2022-11-25 17:57:10,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663147016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:57:10,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:57:10,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:57:10,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399057240] [2022-11-25 17:57:10,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:57:10,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:57:10,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:57:10,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:57:10,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:57:10,220 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 163 [2022-11-25 17:57:10,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 25 flow. Second operand has 2 states, 2 states have (on average 72.5) internal successors, (145), 2 states have internal predecessors, (145), 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) [2022-11-25 17:57:10,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:57:10,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 163 [2022-11-25 17:57:10,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:57:10,267 INFO L130 PetriNetUnfolder]: 7/20 cut-off events. [2022-11-25 17:57:10,267 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:57:10,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 20 events. 7/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 4 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 30. Up to 19 conditions per place. [2022-11-25 17:57:10,270 INFO L137 encePairwiseOnDemand]: 161/163 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2022-11-25 17:57:10,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 35 flow [2022-11-25 17:57:10,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:57:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:57:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 149 transitions. [2022-11-25 17:57:10,289 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4570552147239264 [2022-11-25 17:57:10,290 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 149 transitions. [2022-11-25 17:57:10,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 149 transitions. [2022-11-25 17:57:10,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:57:10,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 149 transitions. [2022-11-25 17:57:10,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 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) [2022-11-25 17:57:10,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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) [2022-11-25 17:57:10,316 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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) [2022-11-25 17:57:10,318 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 25 flow. Second operand 2 states and 149 transitions. [2022-11-25 17:57:10,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 35 flow [2022-11-25 17:57:10,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:57:10,326 INFO L231 Difference]: Finished difference. Result has 11 places, 8 transitions, 21 flow [2022-11-25 17:57:10,328 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=21, PETRI_PLACES=11, PETRI_TRANSITIONS=8} [2022-11-25 17:57:10,336 INFO L288 CegarLoopForPetriNet]: 12 programPoint places, -1 predicate places. [2022-11-25 17:57:10,336 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 8 transitions, 21 flow [2022-11-25 17:57:10,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 72.5) internal successors, (145), 2 states have internal predecessors, (145), 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) [2022-11-25 17:57:10,337 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:57:10,337 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 17:57:10,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:57:10,338 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:57:10,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:57:10,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1360876731, now seen corresponding path program 1 times [2022-11-25 17:57:10,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:57:10,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630881069] [2022-11-25 17:57:10,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:57:10,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:57:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:57:10,389 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:57:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:57:10,442 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:57:10,443 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:57:10,448 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-25 17:57:10,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-25 17:57:10,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-25 17:57:10,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:57:10,456 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 17:57:10,466 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:57:10,466 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 17:57:10,508 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:57:10,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 121 transitions, 254 flow [2022-11-25 17:57:10,558 INFO L130 PetriNetUnfolder]: 13/145 cut-off events. [2022-11-25 17:57:10,559 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:57:10,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 145 events. 13/145 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 246 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 95. Up to 6 conditions per place. [2022-11-25 17:57:10,561 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 121 transitions, 254 flow [2022-11-25 17:57:10,563 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 121 transitions, 254 flow [2022-11-25 17:57:10,563 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:57:10,563 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 121 transitions, 254 flow [2022-11-25 17:57:10,564 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 121 transitions, 254 flow [2022-11-25 17:57:10,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 121 transitions, 254 flow [2022-11-25 17:57:10,592 INFO L130 PetriNetUnfolder]: 13/145 cut-off events. [2022-11-25 17:57:10,592 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:57:10,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 145 events. 13/145 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 246 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 95. Up to 6 conditions per place. [2022-11-25 17:57:10,599 INFO L119 LiptonReduction]: Number of co-enabled transitions 5740 [2022-11-25 17:57:13,864 INFO L134 LiptonReduction]: Checked pairs total: 9551 [2022-11-25 17:57:13,865 INFO L136 LiptonReduction]: Total number of compositions: 115 [2022-11-25 17:57:13,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:57:13,869 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5a782264, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:57:13,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 17:57:13,875 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2022-11-25 17:57:13,875 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:57:13,876 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:57:13,876 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:57:13,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 17:57:13,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:57:13,877 INFO L85 PathProgramCache]: Analyzing trace with hash -788238896, now seen corresponding path program 1 times [2022-11-25 17:57:13,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:57:13,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036422330] [2022-11-25 17:57:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:57:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:57:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:57:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:57:13,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:57:13,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036422330] [2022-11-25 17:57:13,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036422330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:57:13,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:57:13,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:57:13,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023141863] [2022-11-25 17:57:13,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:57:13,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:57:13,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:57:13,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:57:13,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:57:13,997 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 236 [2022-11-25 17:57:13,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2022-11-25 17:57:13,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:57:13,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 236 [2022-11-25 17:57:13,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:57:14,206 INFO L130 PetriNetUnfolder]: 340/593 cut-off events. [2022-11-25 17:57:14,207 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-11-25 17:57:14,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 593 events. 340/593 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2726 event pairs, 144 based on Foata normal form. 0/452 useless extension candidates. Maximal degree in co-relation 720. Up to 351 conditions per place. [2022-11-25 17:57:14,215 INFO L137 encePairwiseOnDemand]: 229/236 looper letters, 31 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2022-11-25 17:57:14,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 41 transitions, 171 flow [2022-11-25 17:57:14,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:57:14,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:57:14,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2022-11-25 17:57:14,224 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4576271186440678 [2022-11-25 17:57:14,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2022-11-25 17:57:14,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2022-11-25 17:57:14,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:57:14,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2022-11-25 17:57:14,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 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) [2022-11-25 17:57:14,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 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) [2022-11-25 17:57:14,231 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 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) [2022-11-25 17:57:14,231 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 68 flow. Second operand 3 states and 324 transitions. [2022-11-25 17:57:14,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 41 transitions, 171 flow [2022-11-25 17:57:14,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 169 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 17:57:14,233 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 98 flow [2022-11-25 17:57:14,234 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2022-11-25 17:57:14,235 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2022-11-25 17:57:14,235 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 98 flow [2022-11-25 17:57:14,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2022-11-25 17:57:14,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:57:14,236 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 17:57:14,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:57:14,236 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 17:57:14,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:57:14,237 INFO L85 PathProgramCache]: Analyzing trace with hash -330740689, now seen corresponding path program 1 times [2022-11-25 17:57:14,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:57:14,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855123465] [2022-11-25 17:57:14,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:57:14,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:57:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:57:14,257 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:57:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:57:14,274 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:57:14,274 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:57:14,274 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-25 17:57:14,275 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-25 17:57:14,275 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-25 17:57:14,275 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-25 17:57:14,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:57:14,276 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 17:57:14,276 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:57:14,277 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 17:57:14,305 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:57:14,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 163 transitions, 347 flow [2022-11-25 17:57:14,342 INFO L130 PetriNetUnfolder]: 19/200 cut-off events. [2022-11-25 17:57:14,342 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:57:14,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 200 events. 19/200 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 463 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2022-11-25 17:57:14,346 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 163 transitions, 347 flow [2022-11-25 17:57:14,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 163 transitions, 347 flow [2022-11-25 17:57:14,348 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:57:14,348 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 163 transitions, 347 flow [2022-11-25 17:57:14,349 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 163 transitions, 347 flow [2022-11-25 17:57:14,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 163 transitions, 347 flow [2022-11-25 17:57:14,381 INFO L130 PetriNetUnfolder]: 19/200 cut-off events. [2022-11-25 17:57:14,381 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:57:14,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 200 events. 19/200 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 463 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2022-11-25 17:57:14,393 INFO L119 LiptonReduction]: Number of co-enabled transitions 13776 [2022-11-25 17:57:18,286 INFO L134 LiptonReduction]: Checked pairs total: 22924 [2022-11-25 17:57:18,287 INFO L136 LiptonReduction]: Total number of compositions: 151 [2022-11-25 17:57:18,289 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:57:18,290 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5a782264, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:57:18,290 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 17:57:18,294 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2022-11-25 17:57:18,294 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:57:18,294 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:57:18,294 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:57:18,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:57:18,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:57:18,295 INFO L85 PathProgramCache]: Analyzing trace with hash -2059146596, now seen corresponding path program 1 times [2022-11-25 17:57:18,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:57:18,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743085700] [2022-11-25 17:57:18,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:57:18,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:57:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:57:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:57:18,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:57:18,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743085700] [2022-11-25 17:57:18,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743085700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:57:18,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:57:18,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:57:18,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065579048] [2022-11-25 17:57:18,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:57:18,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:57:18,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:57:18,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:57:18,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:57:18,432 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 314 [2022-11-25 17:57:18,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 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) [2022-11-25 17:57:18,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:57:18,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 314 [2022-11-25 17:57:18,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:57:19,323 INFO L130 PetriNetUnfolder]: 4700/6828 cut-off events. [2022-11-25 17:57:19,324 INFO L131 PetriNetUnfolder]: For 685/685 co-relation queries the response was YES. [2022-11-25 17:57:19,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13733 conditions, 6828 events. 4700/6828 cut-off events. For 685/685 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 39097 event pairs, 2158 based on Foata normal form. 0/5220 useless extension candidates. Maximal degree in co-relation 1512. Up to 4275 conditions per place. [2022-11-25 17:57:19,386 INFO L137 encePairwiseOnDemand]: 306/314 looper letters, 48 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2022-11-25 17:57:19,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 61 transitions, 263 flow [2022-11-25 17:57:19,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:57:19,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:57:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 444 transitions. [2022-11-25 17:57:19,388 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4713375796178344 [2022-11-25 17:57:19,389 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 444 transitions. [2022-11-25 17:57:19,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 444 transitions. [2022-11-25 17:57:19,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:57:19,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 444 transitions. [2022-11-25 17:57:19,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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) [2022-11-25 17:57:19,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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) [2022-11-25 17:57:19,396 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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) [2022-11-25 17:57:19,396 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 99 flow. Second operand 3 states and 444 transitions. [2022-11-25 17:57:19,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 61 transitions, 263 flow [2022-11-25 17:57:19,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 61 transitions, 255 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-25 17:57:19,400 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 133 flow [2022-11-25 17:57:19,401 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2022-11-25 17:57:19,402 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2022-11-25 17:57:19,402 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 133 flow [2022-11-25 17:57:19,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 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) [2022-11-25 17:57:19,403 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:57:19,403 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:57:19,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:57:19,404 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:57:19,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:57:19,404 INFO L85 PathProgramCache]: Analyzing trace with hash -751467342, now seen corresponding path program 1 times [2022-11-25 17:57:19,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:57:19,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872147653] [2022-11-25 17:57:19,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:57:19,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:57:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:57:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:57:19,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:57:19,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872147653] [2022-11-25 17:57:19,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872147653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:57:19,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:57:19,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:57:19,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908188631] [2022-11-25 17:57:19,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:57:19,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:57:19,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:57:19,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:57:19,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:57:19,506 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 314 [2022-11-25 17:57:19,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 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) [2022-11-25 17:57:19,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:57:19,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 314 [2022-11-25 17:57:19,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:57:21,078 INFO L130 PetriNetUnfolder]: 7552/10789 cut-off events. [2022-11-25 17:57:21,078 INFO L131 PetriNetUnfolder]: For 3886/3886 co-relation queries the response was YES. [2022-11-25 17:57:21,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24483 conditions, 10789 events. 7552/10789 cut-off events. For 3886/3886 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 62770 event pairs, 3205 based on Foata normal form. 0/9097 useless extension candidates. Maximal degree in co-relation 9097. Up to 6242 conditions per place. [2022-11-25 17:57:21,173 INFO L137 encePairwiseOnDemand]: 307/314 looper letters, 53 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2022-11-25 17:57:21,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 68 transitions, 336 flow [2022-11-25 17:57:21,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:57:21,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:57:21,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2022-11-25 17:57:21,176 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4692144373673036 [2022-11-25 17:57:21,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2022-11-25 17:57:21,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2022-11-25 17:57:21,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:57:21,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2022-11-25 17:57:21,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 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) [2022-11-25 17:57:21,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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) [2022-11-25 17:57:21,183 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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) [2022-11-25 17:57:21,184 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 133 flow. Second operand 3 states and 442 transitions. [2022-11-25 17:57:21,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 68 transitions, 336 flow [2022-11-25 17:57:21,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 68 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:57:21,195 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 181 flow [2022-11-25 17:57:21,196 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2022-11-25 17:57:21,196 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2022-11-25 17:57:21,197 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 181 flow [2022-11-25 17:57:21,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 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) [2022-11-25 17:57:21,198 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:57:21,198 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 17:57:21,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:57:21,199 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:57:21,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:57:21,200 INFO L85 PathProgramCache]: Analyzing trace with hash 475781400, now seen corresponding path program 1 times [2022-11-25 17:57:21,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:57:21,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467872268] [2022-11-25 17:57:21,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:57:21,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:57:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:57:21,217 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:57:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:57:21,234 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:57:21,234 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:57:21,235 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-25 17:57:21,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-25 17:57:21,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-25 17:57:21,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-25 17:57:21,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-25 17:57:21,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:57:21,237 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 17:57:21,237 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:57:21,238 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 17:57:21,271 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:57:21,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 205 transitions, 442 flow [2022-11-25 17:57:21,323 INFO L130 PetriNetUnfolder]: 25/255 cut-off events. [2022-11-25 17:57:21,323 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:57:21,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 255 events. 25/255 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 712 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 208. Up to 10 conditions per place. [2022-11-25 17:57:21,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 205 transitions, 442 flow [2022-11-25 17:57:21,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 205 transitions, 442 flow [2022-11-25 17:57:21,329 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:57:21,329 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 205 transitions, 442 flow [2022-11-25 17:57:21,330 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 205 transitions, 442 flow [2022-11-25 17:57:21,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 205 transitions, 442 flow [2022-11-25 17:57:21,426 INFO L130 PetriNetUnfolder]: 25/255 cut-off events. [2022-11-25 17:57:21,426 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:57:21,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 255 events. 25/255 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 712 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 208. Up to 10 conditions per place. [2022-11-25 17:57:21,443 INFO L119 LiptonReduction]: Number of co-enabled transitions 25256 [2022-11-25 17:57:26,117 INFO L134 LiptonReduction]: Checked pairs total: 40971 [2022-11-25 17:57:26,117 INFO L136 LiptonReduction]: Total number of compositions: 196 [2022-11-25 17:57:26,120 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:57:26,121 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5a782264, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:57:26,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-25 17:57:26,126 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2022-11-25 17:57:26,127 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:57:26,127 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:57:26,127 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:57:26,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-25 17:57:26,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:57:26,128 INFO L85 PathProgramCache]: Analyzing trace with hash -326301465, now seen corresponding path program 1 times [2022-11-25 17:57:26,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:57:26,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23802372] [2022-11-25 17:57:26,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:57:26,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:57:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:57:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:57:26,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:57:26,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23802372] [2022-11-25 17:57:26,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23802372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:57:26,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:57:26,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:57:26,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530766457] [2022-11-25 17:57:26,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:57:26,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:57:26,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:57:26,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:57:26,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:57:26,282 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 401 [2022-11-25 17:57:26,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 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) [2022-11-25 17:57:26,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:57:26,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 401 [2022-11-25 17:57:26,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:57:33,971 INFO L130 PetriNetUnfolder]: 57183/75565 cut-off events. [2022-11-25 17:57:33,971 INFO L131 PetriNetUnfolder]: For 10914/10914 co-relation queries the response was YES. [2022-11-25 17:57:34,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153557 conditions, 75565 events. 57183/75565 cut-off events. For 10914/10914 co-relation queries the response was YES. Maximal size of possible extension queue 2878. Compared 473614 event pairs, 25420 based on Foata normal form. 0/58186 useless extension candidates. Maximal degree in co-relation 14665. Up to 45825 conditions per place. [2022-11-25 17:57:34,585 INFO L137 encePairwiseOnDemand]: 392/401 looper letters, 66 selfloop transitions, 7 changer transitions 0/82 dead transitions. [2022-11-25 17:57:34,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 82 transitions, 363 flow [2022-11-25 17:57:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:57:34,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:57:34,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2022-11-25 17:57:34,590 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4696591853699086 [2022-11-25 17:57:34,590 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2022-11-25 17:57:34,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2022-11-25 17:57:34,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:57:34,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2022-11-25 17:57:34,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 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) [2022-11-25 17:57:34,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 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) [2022-11-25 17:57:34,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 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) [2022-11-25 17:57:34,599 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 132 flow. Second operand 3 states and 565 transitions. [2022-11-25 17:57:34,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 82 transitions, 363 flow [2022-11-25 17:57:34,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 82 transitions, 345 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-11-25 17:57:34,625 INFO L231 Difference]: Finished difference. Result has 54 places, 54 transitions, 168 flow [2022-11-25 17:57:34,626 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=54} [2022-11-25 17:57:34,628 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2022-11-25 17:57:34,629 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 54 transitions, 168 flow [2022-11-25 17:57:34,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 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) [2022-11-25 17:57:34,630 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:57:34,630 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:57:34,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:57:34,630 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-25 17:57:34,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:57:34,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1483208130, now seen corresponding path program 1 times [2022-11-25 17:57:34,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:57:34,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165124510] [2022-11-25 17:57:34,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:57:34,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:57:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:57:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:57:34,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:57:34,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165124510] [2022-11-25 17:57:34,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165124510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:57:34,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:57:34,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:57:34,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253417132] [2022-11-25 17:57:34,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:57:34,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:57:34,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:57:34,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:57:34,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:57:34,784 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 401 [2022-11-25 17:57:34,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 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) [2022-11-25 17:57:34,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:57:34,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 401 [2022-11-25 17:57:34,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:57:47,521 INFO L130 PetriNetUnfolder]: 93460/122960 cut-off events. [2022-11-25 17:57:47,521 INFO L131 PetriNetUnfolder]: For 40126/40154 co-relation queries the response was YES. [2022-11-25 17:57:47,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274472 conditions, 122960 events. 93460/122960 cut-off events. For 40126/40154 co-relation queries the response was YES. Maximal size of possible extension queue 4727. Compared 796377 event pairs, 41161 based on Foata normal form. 28/97268 useless extension candidates. Maximal degree in co-relation 107971. Up to 73704 conditions per place. [2022-11-25 17:57:48,775 INFO L137 encePairwiseOnDemand]: 393/401 looper letters, 71 selfloop transitions, 10 changer transitions 0/90 dead transitions. [2022-11-25 17:57:48,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 90 transitions, 442 flow [2022-11-25 17:57:48,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:57:48,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:57:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2022-11-25 17:57:48,785 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46716541978387366 [2022-11-25 17:57:48,786 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2022-11-25 17:57:48,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2022-11-25 17:57:48,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:57:48,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2022-11-25 17:57:48,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 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) [2022-11-25 17:57:48,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 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) [2022-11-25 17:57:48,797 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 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) [2022-11-25 17:57:48,797 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 168 flow. Second operand 3 states and 562 transitions. [2022-11-25 17:57:48,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 90 transitions, 442 flow [2022-11-25 17:57:49,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 90 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:57:49,128 INFO L231 Difference]: Finished difference. Result has 56 places, 61 transitions, 234 flow [2022-11-25 17:57:49,129 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=56, PETRI_TRANSITIONS=61} [2022-11-25 17:57:49,131 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2022-11-25 17:57:49,132 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 61 transitions, 234 flow [2022-11-25 17:57:49,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 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) [2022-11-25 17:57:49,133 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:57:49,133 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:57:49,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:57:49,136 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-25 17:57:49,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:57:49,137 INFO L85 PathProgramCache]: Analyzing trace with hash -193265562, now seen corresponding path program 1 times [2022-11-25 17:57:49,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:57:49,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483853203] [2022-11-25 17:57:49,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:57:49,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:57:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:57:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 17:57:49,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:57:49,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483853203] [2022-11-25 17:57:49,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483853203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:57:49,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:57:49,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:57:49,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274773148] [2022-11-25 17:57:49,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:57:49,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:57:49,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:57:49,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:57:49,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:57:49,309 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 401 [2022-11-25 17:57:49,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 61 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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) [2022-11-25 17:57:49,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:57:49,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 401 [2022-11-25 17:57:49,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand