./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.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_b497a179-04ff-448d-b172-cde5016670a4/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b497a179-04ff-448d-b172-cde5016670a4/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_b497a179-04ff-448d-b172-cde5016670a4/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b497a179-04ff-448d-b172-cde5016670a4/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b497a179-04ff-448d-b172-cde5016670a4/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_b497a179-04ff-448d-b172-cde5016670a4/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 a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 --- 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 16:59:45,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:59:45,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:59:45,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:59:45,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:59:45,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:59:45,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:59:45,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:59:45,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:59:45,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:59:45,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:59:45,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:59:45,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:59:45,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:59:45,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:59:45,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:59:45,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:59:45,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:59:45,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:59:45,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:59:45,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:59:45,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:59:45,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:59:45,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:59:45,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:59:45,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:59:45,609 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:59:45,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:59:45,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:59:45,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:59:45,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:59:45,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:59:45,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:59:45,617 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:59:45,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:59:45,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:59:45,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:59:45,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:59:45,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:59:45,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:59:45,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:59:45,626 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b497a179-04ff-448d-b172-cde5016670a4/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 16:59:45,665 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:59:45,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:59:45,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:59:45,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:59:45,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:59:45,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:59:45,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:59:45,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:59:45,668 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:59:45,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:59:45,670 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:59:45,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:59:45,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:59:45,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:59:45,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 16:59:45,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:59:45,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 16:59:45,671 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:59:45,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 16:59:45,672 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:59:45,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 16:59:45,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:59:45,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:59:45,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:59:45,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:59:45,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:59:45,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:59:45,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 16:59:45,674 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:59:45,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:59:45,675 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:59:45,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 16:59:45,675 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:59:45,676 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:59:45,676 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_b497a179-04ff-448d-b172-cde5016670a4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b497a179-04ff-448d-b172-cde5016670a4/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 [2022-11-25 16:59:45,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:59:46,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:59:46,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:59:46,030 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:59:46,030 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:59:46,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b497a179-04ff-448d-b172-cde5016670a4/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2022-11-25 16:59:49,138 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:59:49,438 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:59:49,443 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b497a179-04ff-448d-b172-cde5016670a4/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2022-11-25 16:59:49,454 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b497a179-04ff-448d-b172-cde5016670a4/bin/uautomizer-ZsLfNo2U6R/data/62279bd24/41114985bade49e19a0f72d0bdc1622d/FLAG0f8770b8d [2022-11-25 16:59:49,469 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b497a179-04ff-448d-b172-cde5016670a4/bin/uautomizer-ZsLfNo2U6R/data/62279bd24/41114985bade49e19a0f72d0bdc1622d [2022-11-25 16:59:49,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:59:49,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:59:49,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:59:49,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:59:49,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:59:49,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:59:49" (1/1) ... [2022-11-25 16:59:49,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cf310d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:49, skipping insertion in model container [2022-11-25 16:59:49,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:59:49" (1/1) ... [2022-11-25 16:59:49,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:59:49,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:59:49,947 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_b497a179-04ff-448d-b172-cde5016670a4/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i[30726,30739] [2022-11-25 16:59:49,960 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:59:49,976 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:59:50,045 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_b497a179-04ff-448d-b172-cde5016670a4/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i[30726,30739] [2022-11-25 16:59:50,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:59:50,105 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:59:50,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:50 WrapperNode [2022-11-25 16:59:50,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:59:50,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:59:50,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:59:50,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:59:50,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:50" (1/1) ... [2022-11-25 16:59:50,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:50" (1/1) ... [2022-11-25 16:59:50,162 INFO L138 Inliner]: procedures = 171, calls = 26, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 83 [2022-11-25 16:59:50,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:59:50,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:59:50,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:59:50,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:59:50,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:50" (1/1) ... [2022-11-25 16:59:50,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:50" (1/1) ... [2022-11-25 16:59:50,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:50" (1/1) ... [2022-11-25 16:59:50,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:50" (1/1) ... [2022-11-25 16:59:50,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:50" (1/1) ... [2022-11-25 16:59:50,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:50" (1/1) ... [2022-11-25 16:59:50,190 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:50" (1/1) ... [2022-11-25 16:59:50,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:50" (1/1) ... [2022-11-25 16:59:50,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:59:50,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:59:50,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:59:50,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:59:50,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:50" (1/1) ... [2022-11-25 16:59:50,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:59:50,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b497a179-04ff-448d-b172-cde5016670a4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:59:50,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b497a179-04ff-448d-b172-cde5016670a4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:59:50,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b497a179-04ff-448d-b172-cde5016670a4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:59:50,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 16:59:50,280 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-25 16:59:50,282 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-25 16:59:50,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:59:50,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:59:50,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:59:50,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:59:50,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:59:50,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:59:50,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:59:50,287 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 16:59:50,455 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:59:50,458 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:59:50,666 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:59:50,722 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:59:50,723 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 16:59:50,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:59:50 BoogieIcfgContainer [2022-11-25 16:59:50,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:59:50,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:59:50,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:59:50,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:59:50,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:59:49" (1/3) ... [2022-11-25 16:59:50,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1b5b74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:59:50, skipping insertion in model container [2022-11-25 16:59:50,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:50" (2/3) ... [2022-11-25 16:59:50,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1b5b74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:59:50, skipping insertion in model container [2022-11-25 16:59:50,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:59:50" (3/3) ... [2022-11-25 16:59:50,735 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2022-11-25 16:59:50,744 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 16:59:50,756 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:59:50,757 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 16:59:50,757 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 16:59:50,839 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 16:59:50,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 79 transitions, 163 flow [2022-11-25 16:59:50,964 INFO L130 PetriNetUnfolder]: 7/90 cut-off events. [2022-11-25 16:59:50,964 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:59:50,974 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 4. Compared 102 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 60. Up to 4 conditions per place. [2022-11-25 16:59:50,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 79 transitions, 163 flow [2022-11-25 16:59:50,985 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 79 transitions, 163 flow [2022-11-25 16:59:50,990 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:59:51,007 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 79 transitions, 163 flow [2022-11-25 16:59:51,010 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 79 transitions, 163 flow [2022-11-25 16:59:51,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 79 transitions, 163 flow [2022-11-25 16:59:51,039 INFO L130 PetriNetUnfolder]: 7/90 cut-off events. [2022-11-25 16:59:51,039 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:59:51,040 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 4. Compared 102 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 60. Up to 4 conditions per place. [2022-11-25 16:59:51,042 INFO L119 LiptonReduction]: Number of co-enabled transitions 1316 [2022-11-25 16:59:53,441 INFO L134 LiptonReduction]: Checked pairs total: 1465 [2022-11-25 16:59:53,441 INFO L136 LiptonReduction]: Total number of compositions: 76 [2022-11-25 16:59:53,472 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:59:53,483 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;@3e8a18c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:59:53,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 16:59:53,500 INFO L130 PetriNetUnfolder]: 1/13 cut-off events. [2022-11-25 16:59:53,501 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:59:53,502 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:53,503 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 16:59:53,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:59:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:53,513 INFO L85 PathProgramCache]: Analyzing trace with hash -603655548, now seen corresponding path program 1 times [2022-11-25 16:59:53,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:53,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599870482] [2022-11-25 16:59:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:53,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:53,751 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 16:59:53,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:53,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599870482] [2022-11-25 16:59:53,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599870482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:53,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:53,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:59:53,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274944537] [2022-11-25 16:59:53,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:53,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 16:59:53,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:53,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 16:59:53,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 16:59:53,804 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 155 [2022-11-25 16:59:53,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 17 transitions, 39 flow. Second operand has 2 states, 2 states have (on average 70.5) internal successors, (141), 2 states have internal predecessors, (141), 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 16:59:53,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:53,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 155 [2022-11-25 16:59:53,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:53,887 INFO L130 PetriNetUnfolder]: 18/49 cut-off events. [2022-11-25 16:59:53,891 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:59:53,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 49 events. 18/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 15 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 87. Up to 47 conditions per place. [2022-11-25 16:59:53,894 INFO L137 encePairwiseOnDemand]: 152/155 looper letters, 12 selfloop transitions, 0 changer transitions 0/14 dead transitions. [2022-11-25 16:59:53,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 14 transitions, 57 flow [2022-11-25 16:59:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 16:59:53,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 16:59:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 151 transitions. [2022-11-25 16:59:53,914 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4870967741935484 [2022-11-25 16:59:53,915 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 151 transitions. [2022-11-25 16:59:53,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 151 transitions. [2022-11-25 16:59:53,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:53,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 151 transitions. [2022-11-25 16:59:53,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 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 16:59:53,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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 16:59:53,948 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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 16:59:53,950 INFO L175 Difference]: Start difference. First operand has 18 places, 17 transitions, 39 flow. Second operand 2 states and 151 transitions. [2022-11-25 16:59:53,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 14 transitions, 57 flow [2022-11-25 16:59:53,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 14 transitions, 57 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 16:59:53,958 INFO L231 Difference]: Finished difference. Result has 17 places, 14 transitions, 33 flow [2022-11-25 16:59:53,960 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=33, PETRI_PLACES=17, PETRI_TRANSITIONS=14} [2022-11-25 16:59:53,965 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, -1 predicate places. [2022-11-25 16:59:53,965 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 14 transitions, 33 flow [2022-11-25 16:59:53,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 70.5) internal successors, (141), 2 states have internal predecessors, (141), 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 16:59:53,966 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:53,966 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 16:59:53,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:59:53,967 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 16:59:53,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:53,968 INFO L85 PathProgramCache]: Analyzing trace with hash -603584273, now seen corresponding path program 1 times [2022-11-25 16:59:53,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:53,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085968917] [2022-11-25 16:59:53,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:53,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:59:54,001 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 16:59:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:59:54,035 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 16:59:54,035 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 16:59:54,037 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-25 16:59:54,039 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-25 16:59:54,040 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-25 16:59:54,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 16:59:54,041 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 16:59:54,044 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 16:59:54,044 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 16:59:54,075 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 16:59:54,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 127 transitions, 266 flow [2022-11-25 16:59:54,145 INFO L130 PetriNetUnfolder]: 13/151 cut-off events. [2022-11-25 16:59:54,145 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:59:54,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 151 events. 13/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 322 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2022-11-25 16:59:54,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 127 transitions, 266 flow [2022-11-25 16:59:54,155 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 127 transitions, 266 flow [2022-11-25 16:59:54,156 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:59:54,156 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 127 transitions, 266 flow [2022-11-25 16:59:54,157 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 127 transitions, 266 flow [2022-11-25 16:59:54,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 127 transitions, 266 flow [2022-11-25 16:59:54,205 INFO L130 PetriNetUnfolder]: 13/151 cut-off events. [2022-11-25 16:59:54,206 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:59:54,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 151 events. 13/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 322 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2022-11-25 16:59:54,214 INFO L119 LiptonReduction]: Number of co-enabled transitions 7144 [2022-11-25 16:59:56,313 INFO L134 LiptonReduction]: Checked pairs total: 21357 [2022-11-25 16:59:56,313 INFO L136 LiptonReduction]: Total number of compositions: 105 [2022-11-25 16:59:56,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:59:56,317 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;@3e8a18c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:59:56,318 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 16:59:56,322 INFO L130 PetriNetUnfolder]: 2/29 cut-off events. [2022-11-25 16:59:56,323 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:59:56,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:56,323 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:56,324 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 16:59:56,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:56,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1793577156, now seen corresponding path program 1 times [2022-11-25 16:59:56,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:56,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461958884] [2022-11-25 16:59:56,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:56,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:56,367 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 16:59:56,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:56,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461958884] [2022-11-25 16:59:56,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461958884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:56,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:56,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:59:56,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998526888] [2022-11-25 16:59:56,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:56,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 16:59:56,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:56,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 16:59:56,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 16:59:56,371 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 232 [2022-11-25 16:59:56,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 110.0) internal successors, (220), 2 states have internal predecessors, (220), 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 16:59:56,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:56,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 232 [2022-11-25 16:59:56,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:56,524 INFO L130 PetriNetUnfolder]: 390/873 cut-off events. [2022-11-25 16:59:56,525 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-11-25 16:59:56,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1572 conditions, 873 events. 390/873 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4984 event pairs, 324 based on Foata normal form. 0/790 useless extension candidates. Maximal degree in co-relation 1189. Up to 649 conditions per place. [2022-11-25 16:59:56,531 INFO L137 encePairwiseOnDemand]: 228/232 looper letters, 25 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2022-11-25 16:59:56,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 43 transitions, 148 flow [2022-11-25 16:59:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 16:59:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 16:59:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 243 transitions. [2022-11-25 16:59:56,534 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5237068965517241 [2022-11-25 16:59:56,534 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 243 transitions. [2022-11-25 16:59:56,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 243 transitions. [2022-11-25 16:59:56,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:56,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 243 transitions. [2022-11-25 16:59:56,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 121.5) internal successors, (243), 2 states have internal predecessors, (243), 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 16:59:56,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 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 16:59:56,539 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 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 16:59:56,539 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 106 flow. Second operand 2 states and 243 transitions. [2022-11-25 16:59:56,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 43 transitions, 148 flow [2022-11-25 16:59:56,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 146 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 16:59:56,541 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 96 flow [2022-11-25 16:59:56,541 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=96, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2022-11-25 16:59:56,542 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2022-11-25 16:59:56,542 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 96 flow [2022-11-25 16:59:56,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 110.0) internal successors, (220), 2 states have internal predecessors, (220), 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 16:59:56,543 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:56,543 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:56,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 16:59:56,544 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 16:59:56,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:56,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1219016691, now seen corresponding path program 1 times [2022-11-25 16:59:56,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:56,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107793206] [2022-11-25 16:59:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:56,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:56,743 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 16:59:56,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:56,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107793206] [2022-11-25 16:59:56,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107793206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:56,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:56,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:59:56,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182259341] [2022-11-25 16:59:56,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:56,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:59:56,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:56,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:59:56,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:59:56,760 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 232 [2022-11-25 16:59:56,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 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 16:59:56,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:56,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 232 [2022-11-25 16:59:56,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:56,951 INFO L130 PetriNetUnfolder]: 370/796 cut-off events. [2022-11-25 16:59:56,952 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-11-25 16:59:56,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 796 events. 370/796 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 4380 event pairs, 298 based on Foata normal form. 20/734 useless extension candidates. Maximal degree in co-relation 1468. Up to 581 conditions per place. [2022-11-25 16:59:56,958 INFO L137 encePairwiseOnDemand]: 230/232 looper letters, 33 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2022-11-25 16:59:56,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 187 flow [2022-11-25 16:59:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:59:56,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:59:56,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2022-11-25 16:59:56,961 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.507183908045977 [2022-11-25 16:59:56,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2022-11-25 16:59:56,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2022-11-25 16:59:56,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:56,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2022-11-25 16:59:56,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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 16:59:56,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 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 16:59:56,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 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 16:59:56,967 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 96 flow. Second operand 3 states and 353 transitions. [2022-11-25 16:59:56,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 187 flow [2022-11-25 16:59:56,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 52 transitions, 187 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 16:59:56,970 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 96 flow [2022-11-25 16:59:56,970 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2022-11-25 16:59:56,971 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2022-11-25 16:59:56,971 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 96 flow [2022-11-25 16:59:56,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 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 16:59:56,972 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:56,972 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 16:59:56,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 16:59:56,972 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 16:59:56,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:56,973 INFO L85 PathProgramCache]: Analyzing trace with hash 232516824, now seen corresponding path program 1 times [2022-11-25 16:59:56,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:56,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990001002] [2022-11-25 16:59:56,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:56,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:59:56,991 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 16:59:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:59:57,005 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 16:59:57,005 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 16:59:57,006 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-25 16:59:57,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-25 16:59:57,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-25 16:59:57,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-25 16:59:57,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 16:59:57,007 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 16:59:57,008 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 16:59:57,008 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 16:59:57,040 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 16:59:57,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 175 transitions, 371 flow [2022-11-25 16:59:57,075 INFO L130 PetriNetUnfolder]: 19/212 cut-off events. [2022-11-25 16:59:57,075 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 16:59:57,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 212 events. 19/212 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 599 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2022-11-25 16:59:57,078 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 175 transitions, 371 flow [2022-11-25 16:59:57,080 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 175 transitions, 371 flow [2022-11-25 16:59:57,081 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:59:57,081 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 175 transitions, 371 flow [2022-11-25 16:59:57,081 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 175 transitions, 371 flow [2022-11-25 16:59:57,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 175 transitions, 371 flow [2022-11-25 16:59:57,112 INFO L130 PetriNetUnfolder]: 19/212 cut-off events. [2022-11-25 16:59:57,112 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 16:59:57,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 212 events. 19/212 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 599 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2022-11-25 16:59:57,124 INFO L119 LiptonReduction]: Number of co-enabled transitions 17484 [2022-11-25 16:59:59,563 INFO L134 LiptonReduction]: Checked pairs total: 41883 [2022-11-25 16:59:59,564 INFO L136 LiptonReduction]: Total number of compositions: 133 [2022-11-25 16:59:59,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:59:59,567 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;@3e8a18c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:59:59,568 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 16:59:59,573 INFO L130 PetriNetUnfolder]: 1/28 cut-off events. [2022-11-25 16:59:59,573 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 16:59:59,574 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:59,574 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:59,574 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 16:59:59,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:59,575 INFO L85 PathProgramCache]: Analyzing trace with hash 936927027, now seen corresponding path program 1 times [2022-11-25 16:59:59,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:59,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245978102] [2022-11-25 16:59:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:59,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:59,633 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 16:59:59,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:59,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245978102] [2022-11-25 16:59:59,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245978102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:59,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:59,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:59:59,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776698185] [2022-11-25 16:59:59,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:59,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:59:59,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:59,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:59:59,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:59:59,646 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 308 [2022-11-25 16:59:59,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 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 16:59:59,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:59,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 308 [2022-11-25 16:59:59,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:01,976 INFO L130 PetriNetUnfolder]: 11320/16859 cut-off events. [2022-11-25 17:00:01,977 INFO L131 PetriNetUnfolder]: For 1033/1033 co-relation queries the response was YES. [2022-11-25 17:00:02,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32998 conditions, 16859 events. 11320/16859 cut-off events. For 1033/1033 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 112340 event pairs, 8843 based on Foata normal form. 366/14887 useless extension candidates. Maximal degree in co-relation 8396. Up to 14112 conditions per place. [2022-11-25 17:00:02,187 INFO L137 encePairwiseOnDemand]: 302/308 looper letters, 68 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2022-11-25 17:00:02,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 92 transitions, 355 flow [2022-11-25 17:00:02,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:00:02,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:00:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2022-11-25 17:00:02,190 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5443722943722944 [2022-11-25 17:00:02,190 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2022-11-25 17:00:02,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2022-11-25 17:00:02,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:02,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2022-11-25 17:00:02,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 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 17:00:02,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 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 17:00:02,196 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 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 17:00:02,196 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 159 flow. Second operand 3 states and 503 transitions. [2022-11-25 17:00:02,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 92 transitions, 355 flow [2022-11-25 17:00:02,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 347 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-25 17:00:02,203 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 145 flow [2022-11-25 17:00:02,203 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2022-11-25 17:00:02,206 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, -2 predicate places. [2022-11-25 17:00:02,207 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 145 flow [2022-11-25 17:00:02,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 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 17:00:02,207 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:02,208 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:02,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:00:02,208 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 17:00:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:02,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1514576903, now seen corresponding path program 1 times [2022-11-25 17:00:02,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:02,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081974471] [2022-11-25 17:00:02,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:02,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:02,285 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 17:00:02,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:02,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081974471] [2022-11-25 17:00:02,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081974471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:02,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:00:02,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:00:02,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816976589] [2022-11-25 17:00:02,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:02,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:00:02,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:02,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:00:02,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:00:02,292 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 308 [2022-11-25 17:00:02,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 145 flow. Second operand has 3 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 17:00:02,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:02,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 308 [2022-11-25 17:00:02,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:04,562 INFO L130 PetriNetUnfolder]: 10979/16358 cut-off events. [2022-11-25 17:00:04,562 INFO L131 PetriNetUnfolder]: For 856/856 co-relation queries the response was YES. [2022-11-25 17:00:04,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32313 conditions, 16358 events. 10979/16358 cut-off events. For 856/856 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 107955 event pairs, 8910 based on Foata normal form. 336/14761 useless extension candidates. Maximal degree in co-relation 29267. Up to 13900 conditions per place. [2022-11-25 17:00:04,682 INFO L137 encePairwiseOnDemand]: 306/308 looper letters, 64 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2022-11-25 17:00:04,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 330 flow [2022-11-25 17:00:04,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:00:04,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:00:04,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2022-11-25 17:00:04,685 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2022-11-25 17:00:04,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2022-11-25 17:00:04,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2022-11-25 17:00:04,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:04,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2022-11-25 17:00:04,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 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 17:00:04,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 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 17:00:04,691 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 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 17:00:04,692 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 145 flow. Second operand 3 states and 501 transitions. [2022-11-25 17:00:04,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 330 flow [2022-11-25 17:00:04,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:00:04,695 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 144 flow [2022-11-25 17:00:04,695 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2022-11-25 17:00:04,696 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, -1 predicate places. [2022-11-25 17:00:04,696 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 144 flow [2022-11-25 17:00:04,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 17:00:04,697 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:04,697 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 17:00:04,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:00:04,698 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 17:00:04,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:04,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1428254820, now seen corresponding path program 1 times [2022-11-25 17:00:04,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:04,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883081918] [2022-11-25 17:00:04,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:04,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:00:04,727 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:00:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:00:04,754 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:00:04,755 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:00:04,756 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-25 17:00:04,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-25 17:00:04,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-25 17:00:04,757 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-25 17:00:04,757 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-25 17:00:04,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:00:04,757 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 17:00:04,759 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:00:04,759 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 17:00:04,810 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:00:04,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 223 transitions, 478 flow [2022-11-25 17:00:04,860 INFO L130 PetriNetUnfolder]: 25/273 cut-off events. [2022-11-25 17:00:04,860 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:00:04,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 273 events. 25/273 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 881 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 220. Up to 10 conditions per place. [2022-11-25 17:00:04,863 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 223 transitions, 478 flow [2022-11-25 17:00:04,866 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 223 transitions, 478 flow [2022-11-25 17:00:04,866 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:00:04,867 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 223 transitions, 478 flow [2022-11-25 17:00:04,867 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 223 transitions, 478 flow [2022-11-25 17:00:04,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 223 transitions, 478 flow [2022-11-25 17:00:05,018 INFO L130 PetriNetUnfolder]: 25/273 cut-off events. [2022-11-25 17:00:05,019 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:00:05,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 273 events. 25/273 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 881 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 220. Up to 10 conditions per place. [2022-11-25 17:00:05,038 INFO L119 LiptonReduction]: Number of co-enabled transitions 32336 [2022-11-25 17:00:08,521 INFO L134 LiptonReduction]: Checked pairs total: 108137 [2022-11-25 17:00:08,522 INFO L136 LiptonReduction]: Total number of compositions: 178 [2022-11-25 17:00:08,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:00:08,525 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;@3e8a18c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:00:08,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-25 17:00:08,527 INFO L130 PetriNetUnfolder]: 1/12 cut-off events. [2022-11-25 17:00:08,528 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:00:08,528 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:08,528 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:00:08,528 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 17:00:08,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:08,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1232409625, now seen corresponding path program 1 times [2022-11-25 17:00:08,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:08,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079451798] [2022-11-25 17:00:08,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:08,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:08,545 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 17:00:08,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:08,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079451798] [2022-11-25 17:00:08,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079451798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:08,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:00:08,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:00:08,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651232781] [2022-11-25 17:00:08,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:08,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:00:08,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:08,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:00:08,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:00:08,548 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 401 [2022-11-25 17:00:08,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 216 flow. Second operand has 2 states, 2 states have (on average 187.5) internal successors, (375), 2 states have internal predecessors, (375), 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 17:00:08,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:08,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 401 [2022-11-25 17:00:08,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:35,430 INFO L130 PetriNetUnfolder]: 175768/242839 cut-off events. [2022-11-25 17:00:35,431 INFO L131 PetriNetUnfolder]: For 20218/20218 co-relation queries the response was YES. [2022-11-25 17:00:35,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474333 conditions, 242839 events. 175768/242839 cut-off events. For 20218/20218 co-relation queries the response was YES. Maximal size of possible extension queue 7532. Compared 1891891 event pairs, 149693 based on Foata normal form. 0/208192 useless extension candidates. Maximal degree in co-relation 34409. Up to 220762 conditions per place. [2022-11-25 17:00:37,337 INFO L137 encePairwiseOnDemand]: 394/401 looper letters, 53 selfloop transitions, 0 changer transitions 0/85 dead transitions. [2022-11-25 17:00:37,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 85 transitions, 308 flow [2022-11-25 17:00:37,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:00:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:00:37,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 430 transitions. [2022-11-25 17:00:37,340 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5361596009975063 [2022-11-25 17:00:37,340 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 430 transitions. [2022-11-25 17:00:37,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 430 transitions. [2022-11-25 17:00:37,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:37,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 430 transitions. [2022-11-25 17:00:37,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 215.0) internal successors, (430), 2 states have internal predecessors, (430), 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 17:00:37,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 401.0) internal successors, (1203), 3 states have internal predecessors, (1203), 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 17:00:37,346 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 401.0) internal successors, (1203), 3 states have internal predecessors, (1203), 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 17:00:37,346 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 216 flow. Second operand 2 states and 430 transitions. [2022-11-25 17:00:37,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 85 transitions, 308 flow [2022-11-25 17:00:37,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 85 transitions, 296 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-25 17:00:37,378 INFO L231 Difference]: Finished difference. Result has 87 places, 85 transitions, 190 flow [2022-11-25 17:00:37,379 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=190, PETRI_PLACES=87, PETRI_TRANSITIONS=85} [2022-11-25 17:00:37,381 INFO L288 CegarLoopForPetriNet]: 91 programPoint places, -4 predicate places. [2022-11-25 17:00:37,381 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 85 transitions, 190 flow [2022-11-25 17:00:37,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 187.5) internal successors, (375), 2 states have internal predecessors, (375), 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 17:00:37,382 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:37,382 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:37,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:00:37,383 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 17:00:37,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:37,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1769093099, now seen corresponding path program 1 times [2022-11-25 17:00:37,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:37,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783807857] [2022-11-25 17:00:37,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:37,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:37,448 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 17:00:37,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:37,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783807857] [2022-11-25 17:00:37,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783807857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:37,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:00:37,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:00:37,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381687100] [2022-11-25 17:00:37,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:37,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:00:37,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:37,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:00:37,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:00:37,457 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 401 [2022-11-25 17:00:37,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 85 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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 17:00:37,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:37,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 401 [2022-11-25 17:00:37,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand