./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8 --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 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 --- 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-2329fc7 [2022-12-13 17:33:13,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:33:13,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:33:13,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:33:13,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:33:13,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:33:13,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:33:13,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:33:13,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:33:13,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:33:13,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:33:13,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:33:13,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:33:13,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:33:13,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:33:13,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:33:13,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:33:13,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:33:13,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:33:13,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:33:13,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:33:13,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:33:13,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:33:13,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:33:13,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:33:13,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:33:13,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:33:13,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:33:13,982 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:33:13,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:33:13,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:33:13,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:33:13,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:33:13,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:33:13,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:33:13,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:33:13,986 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:33:13,986 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:33:13,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:33:13,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:33:13,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:33:13,988 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 17:33:14,011 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:33:14,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:33:14,011 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:33:14,012 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:33:14,012 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:33:14,013 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:33:14,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:33:14,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:33:14,013 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:33:14,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:33:14,014 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:33:14,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:33:14,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:33:14,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:33:14,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:33:14,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:33:14,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:33:14,015 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:33:14,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:33:14,015 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:33:14,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:33:14,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:33:14,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:33:14,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:33:14,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:33:14,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:33:14,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:33:14,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:33:14,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:33:14,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:33:14,017 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:33:14,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:33:14,017 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:33:14,017 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:33:14,017 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:33:14,018 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_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 [2022-12-13 17:33:14,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:33:14,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:33:14,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:33:14,229 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:33:14,229 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:33:14,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2022-12-13 17:33:16,758 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:33:16,965 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:33:16,966 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2022-12-13 17:33:16,974 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8/data/4b12fd043/d8cc692ec25f4eea8a0fd1362b78f9a8/FLAG9f03d35b3 [2022-12-13 17:33:17,319 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8/data/4b12fd043/d8cc692ec25f4eea8a0fd1362b78f9a8 [2022-12-13 17:33:17,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:33:17,322 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:33:17,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:33:17,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:33:17,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:33:17,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:33:17" (1/1) ... [2022-12-13 17:33:17,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bcd928d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:33:17, skipping insertion in model container [2022-12-13 17:33:17,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:33:17" (1/1) ... [2022-12-13 17:33:17,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:33:17,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:33:17,549 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_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2022-12-13 17:33:17,566 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:33:17,576 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:33:17,601 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_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2022-12-13 17:33:17,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:33:17,631 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:33:17,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:33:17 WrapperNode [2022-12-13 17:33:17,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:33:17,632 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:33:17,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:33:17,633 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:33:17,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:33:17" (1/1) ... [2022-12-13 17:33:17,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:33:17" (1/1) ... [2022-12-13 17:33:17,663 INFO L138 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2022-12-13 17:33:17,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:33:17,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:33:17,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:33:17,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:33:17,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:33:17" (1/1) ... [2022-12-13 17:33:17,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:33:17" (1/1) ... [2022-12-13 17:33:17,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:33:17" (1/1) ... [2022-12-13 17:33:17,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:33:17" (1/1) ... [2022-12-13 17:33:17,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:33:17" (1/1) ... [2022-12-13 17:33:17,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:33:17" (1/1) ... [2022-12-13 17:33:17,681 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:33:17" (1/1) ... [2022-12-13 17:33:17,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:33:17" (1/1) ... [2022-12-13 17:33:17,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:33:17,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:33:17,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:33:17,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:33:17,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:33:17" (1/1) ... [2022-12-13 17:33:17,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:33:17,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:33:17,708 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:33:17,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:33:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:33:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:33:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 17:33:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:33:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:33:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 17:33:17,744 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 17:33:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:33:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:33:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:33:17,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:33:17,746 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 17:33:17,843 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:33:17,845 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:33:18,013 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:33:18,018 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:33:18,019 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-12-13 17:33:18,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:33:18 BoogieIcfgContainer [2022-12-13 17:33:18,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:33:18,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:33:18,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:33:18,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:33:18,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:33:17" (1/3) ... [2022-12-13 17:33:18,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a63f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:33:18, skipping insertion in model container [2022-12-13 17:33:18,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:33:17" (2/3) ... [2022-12-13 17:33:18,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a63f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:33:18, skipping insertion in model container [2022-12-13 17:33:18,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:33:18" (3/3) ... [2022-12-13 17:33:18,027 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2022-12-13 17:33:18,033 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 17:33:18,041 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:33:18,042 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 17:33:18,042 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:33:18,085 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 17:33:18,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 130 transitions, 268 flow [2022-12-13 17:33:18,173 INFO L130 PetriNetUnfolder]: 30/188 cut-off events. [2022-12-13 17:33:18,173 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:33:18,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 188 events. 30/188 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 552 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2022-12-13 17:33:18,177 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 130 transitions, 268 flow [2022-12-13 17:33:18,181 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 125 transitions, 255 flow [2022-12-13 17:33:18,185 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:33:18,196 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 125 transitions, 255 flow [2022-12-13 17:33:18,198 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 125 transitions, 255 flow [2022-12-13 17:33:18,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 125 transitions, 255 flow [2022-12-13 17:33:18,228 INFO L130 PetriNetUnfolder]: 29/183 cut-off events. [2022-12-13 17:33:18,229 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:33:18,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 183 events. 29/183 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 535 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2022-12-13 17:33:18,231 INFO L119 LiptonReduction]: Number of co-enabled transitions 3968 [2022-12-13 17:33:19,853 INFO L134 LiptonReduction]: Checked pairs total: 10954 [2022-12-13 17:33:19,853 INFO L136 LiptonReduction]: Total number of compositions: 94 [2022-12-13 17:33:19,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:33:19,873 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;@1b0eef36, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:33:19,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 17:33:19,878 INFO L130 PetriNetUnfolder]: 4/22 cut-off events. [2022-12-13 17:33:19,878 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:33:19,879 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:33:19,879 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:33:19,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:33:19,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:33:19,885 INFO L85 PathProgramCache]: Analyzing trace with hash 467217287, now seen corresponding path program 1 times [2022-12-13 17:33:19,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:33:19,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057131694] [2022-12-13 17:33:19,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:33:19,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:33:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:33:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:33:20,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:33:20,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057131694] [2022-12-13 17:33:20,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057131694] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:33:20,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:33:20,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:33:20,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930915096] [2022-12-13 17:33:20,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:33:20,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:33:20,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:33:20,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:33:20,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:33:20,085 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 224 [2022-12-13 17:33:20,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 53 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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) [2022-12-13 17:33:20,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:33:20,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 224 [2022-12-13 17:33:20,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:33:20,176 INFO L130 PetriNetUnfolder]: 131/340 cut-off events. [2022-12-13 17:33:20,176 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:33:20,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 340 events. 131/340 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1423 event pairs, 60 based on Foata normal form. 60/362 useless extension candidates. Maximal degree in co-relation 601. Up to 261 conditions per place. [2022-12-13 17:33:20,178 INFO L137 encePairwiseOnDemand]: 205/224 looper letters, 31 selfloop transitions, 2 changer transitions 4/48 dead transitions. [2022-12-13 17:33:20,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 173 flow [2022-12-13 17:33:20,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:33:20,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:33:20,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2022-12-13 17:33:20,189 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5610119047619048 [2022-12-13 17:33:20,190 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2022-12-13 17:33:20,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2022-12-13 17:33:20,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:33:20,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2022-12-13 17:33:20,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 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) [2022-12-13 17:33:20,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 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) [2022-12-13 17:33:20,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 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) [2022-12-13 17:33:20,200 INFO L175 Difference]: Start difference. First operand has 40 places, 53 transitions, 111 flow. Second operand 3 states and 377 transitions. [2022-12-13 17:33:20,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 173 flow [2022-12-13 17:33:20,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 173 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:33:20,204 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 79 flow [2022-12-13 17:33:20,205 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2022-12-13 17:33:20,208 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2022-12-13 17:33:20,208 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 79 flow [2022-12-13 17:33:20,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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) [2022-12-13 17:33:20,209 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:33:20,209 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 17:33:20,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:33:20,209 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:33:20,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:33:20,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1614675189, now seen corresponding path program 1 times [2022-12-13 17:33:20,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:33:20,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729227456] [2022-12-13 17:33:20,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:33:20,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:33:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:33:20,232 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:33:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:33:20,257 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:33:20,257 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:33:20,259 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 17:33:20,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 17:33:20,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:33:20,261 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 17:33:20,262 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:33:20,263 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 17:33:20,279 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 17:33:20,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 163 transitions, 344 flow [2022-12-13 17:33:20,308 INFO L130 PetriNetUnfolder]: 51/304 cut-off events. [2022-12-13 17:33:20,308 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 17:33:20,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 304 events. 51/304 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1033 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 190. Up to 9 conditions per place. [2022-12-13 17:33:20,310 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 163 transitions, 344 flow [2022-12-13 17:33:20,311 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 163 transitions, 344 flow [2022-12-13 17:33:20,311 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:33:20,312 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 163 transitions, 344 flow [2022-12-13 17:33:20,312 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 163 transitions, 344 flow [2022-12-13 17:33:20,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 163 transitions, 344 flow [2022-12-13 17:33:20,334 INFO L130 PetriNetUnfolder]: 51/304 cut-off events. [2022-12-13 17:33:20,334 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 17:33:20,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 304 events. 51/304 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1033 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 190. Up to 9 conditions per place. [2022-12-13 17:33:20,341 INFO L119 LiptonReduction]: Number of co-enabled transitions 10540 [2022-12-13 17:33:22,166 INFO L134 LiptonReduction]: Checked pairs total: 35742 [2022-12-13 17:33:22,167 INFO L136 LiptonReduction]: Total number of compositions: 111 [2022-12-13 17:33:22,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:33:22,169 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;@1b0eef36, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:33:22,169 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 17:33:22,170 INFO L130 PetriNetUnfolder]: 4/20 cut-off events. [2022-12-13 17:33:22,170 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:33:22,170 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:33:22,171 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:33:22,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:33:22,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:33:22,171 INFO L85 PathProgramCache]: Analyzing trace with hash 760932399, now seen corresponding path program 1 times [2022-12-13 17:33:22,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:33:22,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416630100] [2022-12-13 17:33:22,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:33:22,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:33:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:33:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:33:22,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:33:22,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416630100] [2022-12-13 17:33:22,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416630100] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:33:22,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:33:22,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:33:22,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065460689] [2022-12-13 17:33:22,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:33:22,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:33:22,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:33:22,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:33:22,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:33:22,214 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 274 [2022-12-13 17:33:22,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 80 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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) [2022-12-13 17:33:22,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:33:22,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 274 [2022-12-13 17:33:22,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:33:22,536 INFO L130 PetriNetUnfolder]: 2498/4435 cut-off events. [2022-12-13 17:33:22,536 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-12-13 17:33:22,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8373 conditions, 4435 events. 2498/4435 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 29213 event pairs, 1044 based on Foata normal form. 1036/5020 useless extension candidates. Maximal degree in co-relation 1255. Up to 3862 conditions per place. [2022-12-13 17:33:22,549 INFO L137 encePairwiseOnDemand]: 250/274 looper letters, 39 selfloop transitions, 2 changer transitions 9/69 dead transitions. [2022-12-13 17:33:22,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 252 flow [2022-12-13 17:33:22,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:33:22,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:33:22,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2022-12-13 17:33:22,552 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5705596107055961 [2022-12-13 17:33:22,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2022-12-13 17:33:22,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2022-12-13 17:33:22,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:33:22,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2022-12-13 17:33:22,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 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) [2022-12-13 17:33:22,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 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) [2022-12-13 17:33:22,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 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) [2022-12-13 17:33:22,555 INFO L175 Difference]: Start difference. First operand has 60 places, 80 transitions, 178 flow. Second operand 3 states and 469 transitions. [2022-12-13 17:33:22,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 252 flow [2022-12-13 17:33:22,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 69 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:33:22,556 INFO L231 Difference]: Finished difference. Result has 63 places, 51 transitions, 124 flow [2022-12-13 17:33:22,557 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2022-12-13 17:33:22,557 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2022-12-13 17:33:22,557 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 124 flow [2022-12-13 17:33:22,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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) [2022-12-13 17:33:22,557 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:33:22,558 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 17:33:22,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:33:22,558 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:33:22,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:33:22,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1738274526, now seen corresponding path program 1 times [2022-12-13 17:33:22,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:33:22,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909751560] [2022-12-13 17:33:22,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:33:22,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:33:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:33:22,573 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:33:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:33:22,586 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:33:22,586 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:33:22,586 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 17:33:22,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 17:33:22,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:33:22,587 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 17:33:22,587 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:33:22,587 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 17:33:22,604 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 17:33:22,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 196 transitions, 422 flow [2022-12-13 17:33:22,650 INFO L130 PetriNetUnfolder]: 77/453 cut-off events. [2022-12-13 17:33:22,650 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 17:33:22,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 453 events. 77/453 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1678 event pairs, 1 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 312. Up to 16 conditions per place. [2022-12-13 17:33:22,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 196 transitions, 422 flow [2022-12-13 17:33:22,654 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 196 transitions, 422 flow [2022-12-13 17:33:22,654 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:33:22,654 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 196 transitions, 422 flow [2022-12-13 17:33:22,654 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 196 transitions, 422 flow [2022-12-13 17:33:22,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 196 transitions, 422 flow [2022-12-13 17:33:22,685 INFO L130 PetriNetUnfolder]: 77/453 cut-off events. [2022-12-13 17:33:22,685 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 17:33:22,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 453 events. 77/453 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1678 event pairs, 1 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 312. Up to 16 conditions per place. [2022-12-13 17:33:22,696 INFO L119 LiptonReduction]: Number of co-enabled transitions 18972 [2022-12-13 17:33:24,277 INFO L134 LiptonReduction]: Checked pairs total: 62932 [2022-12-13 17:33:24,277 INFO L136 LiptonReduction]: Total number of compositions: 126 [2022-12-13 17:33:24,279 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:33:24,279 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;@1b0eef36, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:33:24,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 17:33:24,281 INFO L130 PetriNetUnfolder]: 4/20 cut-off events. [2022-12-13 17:33:24,281 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:33:24,281 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:33:24,281 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:33:24,281 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:33:24,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:33:24,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1099550804, now seen corresponding path program 1 times [2022-12-13 17:33:24,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:33:24,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80862819] [2022-12-13 17:33:24,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:33:24,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:33:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:33:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:33:24,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:33:24,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80862819] [2022-12-13 17:33:24,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80862819] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:33:24,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:33:24,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:33:24,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292430429] [2022-12-13 17:33:24,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:33:24,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:33:24,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:33:24,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:33:24,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:33:24,315 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 322 [2022-12-13 17:33:24,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 103 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 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) [2022-12-13 17:33:24,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:33:24,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 322 [2022-12-13 17:33:24,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:33:27,161 INFO L130 PetriNetUnfolder]: 28840/42971 cut-off events. [2022-12-13 17:33:27,161 INFO L131 PetriNetUnfolder]: For 793/793 co-relation queries the response was YES. [2022-12-13 17:33:27,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82891 conditions, 42971 events. 28840/42971 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 1222. Compared 319190 event pairs, 22691 based on Foata normal form. 8243/48216 useless extension candidates. Maximal degree in co-relation 13204. Up to 39272 conditions per place. [2022-12-13 17:33:27,330 INFO L137 encePairwiseOnDemand]: 292/322 looper letters, 47 selfloop transitions, 2 changer transitions 10/86 dead transitions. [2022-12-13 17:33:27,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 86 transitions, 316 flow [2022-12-13 17:33:27,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:33:27,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:33:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2022-12-13 17:33:27,333 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5786749482401656 [2022-12-13 17:33:27,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2022-12-13 17:33:27,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2022-12-13 17:33:27,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:33:27,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2022-12-13 17:33:27,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 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) [2022-12-13 17:33:27,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 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) [2022-12-13 17:33:27,339 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 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) [2022-12-13 17:33:27,339 INFO L175 Difference]: Start difference. First operand has 77 places, 103 transitions, 236 flow. Second operand 3 states and 559 transitions. [2022-12-13 17:33:27,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 86 transitions, 316 flow [2022-12-13 17:33:27,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 86 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:33:27,343 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 165 flow [2022-12-13 17:33:27,343 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2022-12-13 17:33:27,344 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2022-12-13 17:33:27,344 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 165 flow [2022-12-13 17:33:27,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 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) [2022-12-13 17:33:27,345 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:33:27,345 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 17:33:27,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:33:27,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:33:27,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:33:27,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1858681052, now seen corresponding path program 1 times [2022-12-13 17:33:27,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:33:27,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966856209] [2022-12-13 17:33:27,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:33:27,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:33:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:33:27,371 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:33:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:33:27,392 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:33:27,392 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:33:27,393 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 17:33:27,393 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 17:33:27,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:33:27,393 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 17:33:27,394 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:33:27,394 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 17:33:27,421 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 17:33:27,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 229 transitions, 502 flow [2022-12-13 17:33:27,498 INFO L130 PetriNetUnfolder]: 115/670 cut-off events. [2022-12-13 17:33:27,499 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 17:33:27,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 670 events. 115/670 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2761 event pairs, 6 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 473. Up to 32 conditions per place. [2022-12-13 17:33:27,502 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 229 transitions, 502 flow [2022-12-13 17:33:27,506 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 229 transitions, 502 flow [2022-12-13 17:33:27,506 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:33:27,506 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 229 transitions, 502 flow [2022-12-13 17:33:27,507 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 229 transitions, 502 flow [2022-12-13 17:33:27,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 229 transitions, 502 flow [2022-12-13 17:33:27,580 INFO L130 PetriNetUnfolder]: 115/670 cut-off events. [2022-12-13 17:33:27,580 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 17:33:27,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 670 events. 115/670 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2761 event pairs, 6 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 473. Up to 32 conditions per place. [2022-12-13 17:33:27,601 INFO L119 LiptonReduction]: Number of co-enabled transitions 29512 [2022-12-13 17:33:29,673 INFO L134 LiptonReduction]: Checked pairs total: 102772 [2022-12-13 17:33:29,673 INFO L136 LiptonReduction]: Total number of compositions: 144 [2022-12-13 17:33:29,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:33:29,676 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;@1b0eef36, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:33:29,676 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 17:33:29,677 INFO L130 PetriNetUnfolder]: 4/20 cut-off events. [2022-12-13 17:33:29,678 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:33:29,678 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:33:29,678 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:33:29,678 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:33:29,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:33:29,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1486017952, now seen corresponding path program 1 times [2022-12-13 17:33:29,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:33:29,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722490737] [2022-12-13 17:33:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:33:29,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:33:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:33:29,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:33:29,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:33:29,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722490737] [2022-12-13 17:33:29,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722490737] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:33:29,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:33:29,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:33:29,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266787970] [2022-12-13 17:33:29,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:33:29,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:33:29,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:33:29,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:33:29,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:33:29,706 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 373 [2022-12-13 17:33:29,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 126 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 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) [2022-12-13 17:33:29,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:33:29,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 373 [2022-12-13 17:33:29,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:15,764 INFO L130 PetriNetUnfolder]: 547811/749079 cut-off events. [2022-12-13 17:34:15,764 INFO L131 PetriNetUnfolder]: For 17980/17980 co-relation queries the response was YES. [2022-12-13 17:34:16,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1453950 conditions, 749079 events. 547811/749079 cut-off events. For 17980/17980 co-relation queries the response was YES. Maximal size of possible extension queue 16250. Compared 6145074 event pairs, 363985 based on Foata normal form. 115978/794598 useless extension candidates. Maximal degree in co-relation 141104. Up to 694155 conditions per place. [2022-12-13 17:34:18,730 INFO L137 encePairwiseOnDemand]: 337/373 looper letters, 61 selfloop transitions, 2 changer transitions 11/103 dead transitions. [2022-12-13 17:34:18,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 103 transitions, 394 flow [2022-12-13 17:34:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:34:18,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:34:18,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2022-12-13 17:34:18,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5853440571939231 [2022-12-13 17:34:18,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2022-12-13 17:34:18,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2022-12-13 17:34:18,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:18,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2022-12-13 17:34:18,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 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) [2022-12-13 17:34:18,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 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) [2022-12-13 17:34:18,736 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 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) [2022-12-13 17:34:18,737 INFO L175 Difference]: Start difference. First operand has 94 places, 126 transitions, 296 flow. Second operand 3 states and 655 transitions. [2022-12-13 17:34:18,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 103 transitions, 394 flow [2022-12-13 17:34:18,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 103 transitions, 394 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:34:18,742 INFO L231 Difference]: Finished difference. Result has 97 places, 83 transitions, 208 flow [2022-12-13 17:34:18,742 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=97, PETRI_TRANSITIONS=83} [2022-12-13 17:34:18,743 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 3 predicate places. [2022-12-13 17:34:18,743 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 83 transitions, 208 flow [2022-12-13 17:34:18,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 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) [2022-12-13 17:34:18,743 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:18,744 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:18,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 17:34:18,744 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:18,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:18,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1191054427, now seen corresponding path program 1 times [2022-12-13 17:34:18,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:18,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863277184] [2022-12-13 17:34:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:18,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:18,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:18,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863277184] [2022-12-13 17:34:18,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863277184] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:18,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522335832] [2022-12-13 17:34:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:18,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:18,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:18,802 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:34:18,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:34:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:18,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 17:34:18,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:34:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:18,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:34:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:18,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522335832] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:34:18,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:34:18,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 17:34:18,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51754947] [2022-12-13 17:34:18,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:34:18,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:34:18,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:18,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:34:18,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:34:18,929 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 373 [2022-12-13 17:34:18,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 83 transitions, 208 flow. Second operand has 7 states, 7 states have (on average 183.0) internal successors, (1281), 7 states have internal predecessors, (1281), 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) [2022-12-13 17:34:18,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:18,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 373 [2022-12-13 17:34:18,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:46,184 INFO L130 PetriNetUnfolder]: 349033/488971 cut-off events. [2022-12-13 17:34:46,184 INFO L131 PetriNetUnfolder]: For 19568/19568 co-relation queries the response was YES. [2022-12-13 17:34:47,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951649 conditions, 488971 events. 349033/488971 cut-off events. For 19568/19568 co-relation queries the response was YES. Maximal size of possible extension queue 11877. Compared 4093459 event pairs, 15928 based on Foata normal form. 976/470817 useless extension candidates. Maximal degree in co-relation 141461. Up to 356401 conditions per place. [2022-12-13 17:34:48,719 INFO L137 encePairwiseOnDemand]: 369/373 looper letters, 148 selfloop transitions, 6 changer transitions 0/183 dead transitions. [2022-12-13 17:34:48,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 183 transitions, 720 flow [2022-12-13 17:34:48,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:34:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:34:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1237 transitions. [2022-12-13 17:34:48,722 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5527256478999106 [2022-12-13 17:34:48,722 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1237 transitions. [2022-12-13 17:34:48,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1237 transitions. [2022-12-13 17:34:48,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:48,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1237 transitions. [2022-12-13 17:34:48,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 206.16666666666666) internal successors, (1237), 6 states have internal predecessors, (1237), 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) [2022-12-13 17:34:48,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 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) [2022-12-13 17:34:48,728 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 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) [2022-12-13 17:34:48,728 INFO L175 Difference]: Start difference. First operand has 97 places, 83 transitions, 208 flow. Second operand 6 states and 1237 transitions. [2022-12-13 17:34:48,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 183 transitions, 720 flow [2022-12-13 17:34:48,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 183 transitions, 706 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 17:34:48,741 INFO L231 Difference]: Finished difference. Result has 98 places, 86 transitions, 234 flow [2022-12-13 17:34:48,741 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=98, PETRI_TRANSITIONS=86} [2022-12-13 17:34:48,742 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 4 predicate places. [2022-12-13 17:34:48,742 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 86 transitions, 234 flow [2022-12-13 17:34:48,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 183.0) internal successors, (1281), 7 states have internal predecessors, (1281), 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) [2022-12-13 17:34:48,742 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:48,742 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:48,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:34:48,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482a34f2-a54f-4523-a06a-ce2cb4bdd6dc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:48,944 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:48,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:48,945 INFO L85 PathProgramCache]: Analyzing trace with hash 461584183, now seen corresponding path program 1 times [2022-12-13 17:34:48,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:48,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149061881] [2022-12-13 17:34:48,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:48,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:34:48,987 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:34:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:34:49,002 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:34:49,002 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:34:49,003 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 17:34:49,003 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 17:34:49,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 17:34:49,003 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 17:34:49,003 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:34:49,003 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 17:34:49,025 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-12-13 17:34:49,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 262 transitions, 584 flow [2022-12-13 17:34:49,122 INFO L130 PetriNetUnfolder]: 181/1027 cut-off events. [2022-12-13 17:34:49,122 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 17:34:49,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1138 conditions, 1027 events. 181/1027 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4828 event pairs, 23 based on Foata normal form. 0/856 useless extension candidates. Maximal degree in co-relation 715. Up to 80 conditions per place. [2022-12-13 17:34:49,128 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 262 transitions, 584 flow [2022-12-13 17:34:49,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 262 transitions, 584 flow [2022-12-13 17:34:49,132 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:34:49,133 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 262 transitions, 584 flow [2022-12-13 17:34:49,133 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 262 transitions, 584 flow [2022-12-13 17:34:49,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 262 transitions, 584 flow [2022-12-13 17:34:49,225 INFO L130 PetriNetUnfolder]: 181/1027 cut-off events. [2022-12-13 17:34:49,225 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 17:34:49,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1138 conditions, 1027 events. 181/1027 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4828 event pairs, 23 based on Foata normal form. 0/856 useless extension candidates. Maximal degree in co-relation 715. Up to 80 conditions per place. [2022-12-13 17:34:49,256 INFO L119 LiptonReduction]: Number of co-enabled transitions 42160 [2022-12-13 17:34:50,954 INFO L134 LiptonReduction]: Checked pairs total: 149843 [2022-12-13 17:34:50,954 INFO L136 LiptonReduction]: Total number of compositions: 158 [2022-12-13 17:34:50,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:34:50,956 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;@1b0eef36, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:34:50,956 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 17:34:50,957 INFO L130 PetriNetUnfolder]: 4/20 cut-off events. [2022-12-13 17:34:50,958 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:34:50,958 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:50,958 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:34:50,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:34:50,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:50,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1919255560, now seen corresponding path program 1 times [2022-12-13 17:34:50,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:50,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097535070] [2022-12-13 17:34:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:50,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:50,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:50,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097535070] [2022-12-13 17:34:50,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097535070] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:34:50,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:34:50,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:34:50,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007777337] [2022-12-13 17:34:50,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:34:50,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:34:50,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:50,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:34:50,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:34:50,989 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 420 [2022-12-13 17:34:50,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 149 transitions, 358 flow. Second operand has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 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) [2022-12-13 17:34:50,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:50,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 420 [2022-12-13 17:34:50,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand