./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/01b_inc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2367946-9ce0-48d0-b38b-42b59720e97f/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2367946-9ce0-48d0-b38b-42b59720e97f/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2367946-9ce0-48d0-b38b-42b59720e97f/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2367946-9ce0-48d0-b38b-42b59720e97f/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/01b_inc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2367946-9ce0-48d0-b38b-42b59720e97f/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2367946-9ce0-48d0-b38b-42b59720e97f/bin/uautomizer-J5u9QxTXDZ --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 a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 --- 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-dbf71c6-m [2022-10-17 11:01:54,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 11:01:54,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 11:01:54,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 11:01:54,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 11:01:54,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 11:01:54,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 11:01:54,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 11:01:54,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 11:01:54,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 11:01:54,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 11:01:54,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 11:01:54,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 11:01:54,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 11:01:54,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 11:01:54,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 11:01:54,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 11:01:54,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 11:01:54,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 11:01:54,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 11:01:54,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 11:01:54,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 11:01:54,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 11:01:54,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 11:01:54,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 11:01:54,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 11:01:54,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 11:01:54,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 11:01:54,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 11:01:54,394 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 11:01:54,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 11:01:54,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 11:01:54,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 11:01:54,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 11:01:54,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 11:01:54,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 11:01:54,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 11:01:54,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 11:01:54,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 11:01:54,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 11:01:54,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 11:01:54,409 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2367946-9ce0-48d0-b38b-42b59720e97f/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 11:01:54,471 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 11:01:54,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 11:01:54,473 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 11:01:54,474 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 11:01:54,476 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 11:01:54,477 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 11:01:54,478 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 11:01:54,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 11:01:54,478 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 11:01:54,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 11:01:54,480 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 11:01:54,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 11:01:54,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 11:01:54,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 11:01:54,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 11:01:54,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 11:01:54,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 11:01:54,482 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 11:01:54,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 11:01:54,482 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 11:01:54,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 11:01:54,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 11:01:54,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 11:01:54,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 11:01:54,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:01:54,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 11:01:54,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 11:01:54,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 11:01:54,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 11:01:54,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 11:01:54,487 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 11:01:54,488 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 11:01:54,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 11:01:54,488 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2367946-9ce0-48d0-b38b-42b59720e97f/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2367946-9ce0-48d0-b38b-42b59720e97f/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 [2022-10-17 11:01:54,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 11:01:54,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 11:01:54,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 11:01:54,859 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 11:01:54,860 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 11:01:54,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2367946-9ce0-48d0-b38b-42b59720e97f/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/pthread-ext/01b_inc.i [2022-10-17 11:01:54,950 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2367946-9ce0-48d0-b38b-42b59720e97f/bin/uautomizer-J5u9QxTXDZ/data/7fa8d02ed/d1dcfa6b17874941a4d18ef76361a6c8/FLAG2aed918f1 [2022-10-17 11:01:55,560 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 11:01:55,561 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2367946-9ce0-48d0-b38b-42b59720e97f/sv-benchmarks/c/pthread-ext/01b_inc.i [2022-10-17 11:01:55,583 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2367946-9ce0-48d0-b38b-42b59720e97f/bin/uautomizer-J5u9QxTXDZ/data/7fa8d02ed/d1dcfa6b17874941a4d18ef76361a6c8/FLAG2aed918f1 [2022-10-17 11:01:55,856 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2367946-9ce0-48d0-b38b-42b59720e97f/bin/uautomizer-J5u9QxTXDZ/data/7fa8d02ed/d1dcfa6b17874941a4d18ef76361a6c8 [2022-10-17 11:01:55,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 11:01:55,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 11:01:55,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 11:01:55,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 11:01:55,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 11:01:55,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:01:55" (1/1) ... [2022-10-17 11:01:55,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@233fa8ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:55, skipping insertion in model container [2022-10-17 11:01:55,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:01:55" (1/1) ... [2022-10-17 11:01:55,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 11:01:55,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:01:56,162 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-10-17 11:01:56,311 WARN L230 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_d2367946-9ce0-48d0-b38b-42b59720e97f/sv-benchmarks/c/pthread-ext/01b_inc.i[31005,31018] [2022-10-17 11:01:56,319 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:01:56,326 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 11:01:56,341 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-10-17 11:01:56,361 WARN L230 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_d2367946-9ce0-48d0-b38b-42b59720e97f/sv-benchmarks/c/pthread-ext/01b_inc.i[31005,31018] [2022-10-17 11:01:56,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:01:56,399 INFO L208 MainTranslator]: Completed translation [2022-10-17 11:01:56,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:56 WrapperNode [2022-10-17 11:01:56,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 11:01:56,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 11:01:56,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 11:01:56,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 11:01:56,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:56" (1/1) ... [2022-10-17 11:01:56,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:56" (1/1) ... [2022-10-17 11:01:56,443 INFO L138 Inliner]: procedures = 173, calls = 20, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 62 [2022-10-17 11:01:56,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 11:01:56,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 11:01:56,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 11:01:56,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 11:01:56,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:56" (1/1) ... [2022-10-17 11:01:56,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:56" (1/1) ... [2022-10-17 11:01:56,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:56" (1/1) ... [2022-10-17 11:01:56,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:56" (1/1) ... [2022-10-17 11:01:56,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:56" (1/1) ... [2022-10-17 11:01:56,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:56" (1/1) ... [2022-10-17 11:01:56,466 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:56" (1/1) ... [2022-10-17 11:01:56,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:56" (1/1) ... [2022-10-17 11:01:56,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 11:01:56,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 11:01:56,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 11:01:56,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 11:01:56,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:56" (1/1) ... [2022-10-17 11:01:56,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:01:56,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2367946-9ce0-48d0-b38b-42b59720e97f/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:01:56,519 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2367946-9ce0-48d0-b38b-42b59720e97f/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 11:01:56,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2367946-9ce0-48d0-b38b-42b59720e97f/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 11:01:56,576 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-10-17 11:01:56,577 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-10-17 11:01:56,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 11:01:56,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-10-17 11:01:56,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 11:01:56,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 11:01:56,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 11:01:56,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 11:01:56,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-10-17 11:01:56,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 11:01:56,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 11:01:56,582 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 11:01:56,795 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 11:01:56,797 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 11:01:57,051 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 11:01:57,123 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 11:01:57,123 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 11:01:57,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:01:57 BoogieIcfgContainer [2022-10-17 11:01:57,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 11:01:57,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 11:01:57,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 11:01:57,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 11:01:57,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 11:01:55" (1/3) ... [2022-10-17 11:01:57,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140750d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:01:57, skipping insertion in model container [2022-10-17 11:01:57,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:56" (2/3) ... [2022-10-17 11:01:57,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140750d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:01:57, skipping insertion in model container [2022-10-17 11:01:57,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:01:57" (3/3) ... [2022-10-17 11:01:57,174 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2022-10-17 11:01:57,195 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 11:01:57,209 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 11:01:57,209 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 11:01:57,209 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 11:01:57,313 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 11:01:57,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 44 transitions, 93 flow [2022-10-17 11:01:57,423 INFO L130 PetriNetUnfolder]: 3/55 cut-off events. [2022-10-17 11:01:57,423 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 11:01:57,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 55 events. 3/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 27. Up to 4 conditions per place. [2022-10-17 11:01:57,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 44 transitions, 93 flow [2022-10-17 11:01:57,434 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 44 transitions, 93 flow [2022-10-17 11:01:57,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:01:57,461 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;@1908c011, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:01:57,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-10-17 11:01:57,495 INFO L130 PetriNetUnfolder]: 2/48 cut-off events. [2022-10-17 11:01:57,495 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 11:01:57,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:01:57,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:57,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:57,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:57,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1465134151, now seen corresponding path program 1 times [2022-10-17 11:01:57,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:57,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560993416] [2022-10-17 11:01:57,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:57,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 11:01:57,662 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 11:01:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 11:01:57,716 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 11:01:57,718 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 11:01:57,719 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-10-17 11:01:57,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-10-17 11:01:57,722 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-10-17 11:01:57,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 11:01:57,723 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-10-17 11:01:57,726 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 11:01:57,726 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-10-17 11:01:57,751 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 11:01:57,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 59 transitions, 130 flow [2022-10-17 11:01:57,780 INFO L130 PetriNetUnfolder]: 5/83 cut-off events. [2022-10-17 11:01:57,780 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 11:01:57,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 83 events. 5/83 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 152 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 56. Up to 6 conditions per place. [2022-10-17 11:01:57,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 59 transitions, 130 flow [2022-10-17 11:01:57,784 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 59 transitions, 130 flow [2022-10-17 11:01:57,787 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:01:57,789 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;@1908c011, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:01:57,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-10-17 11:01:57,808 INFO L130 PetriNetUnfolder]: 2/51 cut-off events. [2022-10-17 11:01:57,809 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 11:01:57,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:01:57,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:57,810 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-10-17 11:01:57,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:57,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1378291579, now seen corresponding path program 1 times [2022-10-17 11:01:57,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:57,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170607053] [2022-10-17 11:01:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:57,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:01:58,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:58,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170607053] [2022-10-17 11:01:58,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170607053] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:58,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:58,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 11:01:58,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382932651] [2022-10-17 11:01:58,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:58,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:01:58,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:58,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:01:58,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:01:58,352 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 59 [2022-10-17 11:01:58,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 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) [2022-10-17 11:01:58,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:01:58,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 59 [2022-10-17 11:01:58,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:01:58,669 INFO L130 PetriNetUnfolder]: 85/311 cut-off events. [2022-10-17 11:01:58,669 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-10-17 11:01:58,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 311 events. 85/311 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1512 event pairs, 37 based on Foata normal form. 122/394 useless extension candidates. Maximal degree in co-relation 416. Up to 69 conditions per place. [2022-10-17 11:01:58,676 INFO L137 encePairwiseOnDemand]: 49/59 looper letters, 40 selfloop transitions, 9 changer transitions 0/79 dead transitions. [2022-10-17 11:01:58,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 278 flow [2022-10-17 11:01:58,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 11:01:58,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 11:01:58,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 273 transitions. [2022-10-17 11:01:58,694 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7711864406779662 [2022-10-17 11:01:58,695 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 273 transitions. [2022-10-17 11:01:58,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 273 transitions. [2022-10-17 11:01:58,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:01:58,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 273 transitions. [2022-10-17 11:01:58,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 45.5) internal successors, (273), 6 states have internal predecessors, (273), 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) [2022-10-17 11:01:58,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 59.0) internal successors, (413), 7 states have internal predecessors, (413), 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) [2022-10-17 11:01:58,722 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 59.0) internal successors, (413), 7 states have internal predecessors, (413), 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) [2022-10-17 11:01:58,724 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 130 flow. Second operand 6 states and 273 transitions. [2022-10-17 11:01:58,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 278 flow [2022-10-17 11:01:58,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 79 transitions, 276 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-10-17 11:01:58,734 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 170 flow [2022-10-17 11:01:58,737 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2022-10-17 11:01:58,741 INFO L287 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2022-10-17 11:01:58,741 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 170 flow [2022-10-17 11:01:58,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 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) [2022-10-17 11:01:58,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:01:58,743 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:58,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 11:01:58,743 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-10-17 11:01:58,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:58,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1144847341, now seen corresponding path program 1 times [2022-10-17 11:01:58,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:58,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221963780] [2022-10-17 11:01:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:58,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 11:01:58,768 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 11:01:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 11:01:58,795 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 11:01:58,796 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 11:01:58,796 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-10-17 11:01:58,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-10-17 11:01:58,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-10-17 11:01:58,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-10-17 11:01:58,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 11:01:58,801 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-17 11:01:58,802 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 11:01:58,802 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-10-17 11:01:58,859 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 11:01:58,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 74 transitions, 169 flow [2022-10-17 11:01:58,903 INFO L130 PetriNetUnfolder]: 7/111 cut-off events. [2022-10-17 11:01:58,903 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-10-17 11:01:58,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 111 events. 7/111 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 237 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 87. Up to 8 conditions per place. [2022-10-17 11:01:58,908 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 74 transitions, 169 flow [2022-10-17 11:01:58,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 74 transitions, 169 flow [2022-10-17 11:01:58,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:01:58,919 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;@1908c011, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:01:58,921 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-10-17 11:01:58,934 INFO L130 PetriNetUnfolder]: 2/51 cut-off events. [2022-10-17 11:01:58,934 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 11:01:58,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:01:58,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:58,935 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 11:01:58,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:58,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1314245879, now seen corresponding path program 1 times [2022-10-17 11:01:58,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:58,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731763008] [2022-10-17 11:01:58,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:58,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:01:59,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:59,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731763008] [2022-10-17 11:01:59,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731763008] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:59,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:59,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 11:01:59,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761775366] [2022-10-17 11:01:59,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:59,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:01:59,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:59,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:01:59,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:01:59,235 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 74 [2022-10-17 11:01:59,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 169 flow. Second operand has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 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) [2022-10-17 11:01:59,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:01:59,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 74 [2022-10-17 11:01:59,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:02:00,607 INFO L130 PetriNetUnfolder]: 2447/4992 cut-off events. [2022-10-17 11:02:00,608 INFO L131 PetriNetUnfolder]: For 784/784 co-relation queries the response was YES. [2022-10-17 11:02:00,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9480 conditions, 4992 events. 2447/4992 cut-off events. For 784/784 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 39411 event pairs, 1117 based on Foata normal form. 1519/5687 useless extension candidates. Maximal degree in co-relation 4058. Up to 1793 conditions per place. [2022-10-17 11:02:00,687 INFO L137 encePairwiseOnDemand]: 62/74 looper letters, 89 selfloop transitions, 12 changer transitions 0/136 dead transitions. [2022-10-17 11:02:00,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 136 transitions, 533 flow [2022-10-17 11:02:00,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 11:02:00,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 11:02:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 357 transitions. [2022-10-17 11:02:00,696 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8040540540540541 [2022-10-17 11:02:00,697 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 357 transitions. [2022-10-17 11:02:00,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 357 transitions. [2022-10-17 11:02:00,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:02:00,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 357 transitions. [2022-10-17 11:02:00,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.5) internal successors, (357), 6 states have internal predecessors, (357), 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) [2022-10-17 11:02:00,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 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) [2022-10-17 11:02:00,706 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 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) [2022-10-17 11:02:00,707 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 169 flow. Second operand 6 states and 357 transitions. [2022-10-17 11:02:00,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 136 transitions, 533 flow [2022-10-17 11:02:00,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 136 transitions, 519 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-10-17 11:02:00,717 INFO L231 Difference]: Finished difference. Result has 80 places, 79 transitions, 240 flow [2022-10-17 11:02:00,718 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=80, PETRI_TRANSITIONS=79} [2022-10-17 11:02:00,719 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2022-10-17 11:02:00,719 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 79 transitions, 240 flow [2022-10-17 11:02:00,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 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) [2022-10-17 11:02:00,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:02:00,720 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:00,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 11:02:00,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 11:02:00,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:00,722 INFO L85 PathProgramCache]: Analyzing trace with hash -465754956, now seen corresponding path program 1 times [2022-10-17 11:02:00,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:00,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864486912] [2022-10-17 11:02:00,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:00,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 11:02:01,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:01,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864486912] [2022-10-17 11:02:01,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864486912] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:01,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:01,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 11:02:01,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836797119] [2022-10-17 11:02:01,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:01,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:02:01,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:01,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:02:01,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:02:01,030 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 74 [2022-10-17 11:02:01,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 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) [2022-10-17 11:02:01,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:02:01,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 74 [2022-10-17 11:02:01,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:02:02,632 INFO L130 PetriNetUnfolder]: 3323/6727 cut-off events. [2022-10-17 11:02:02,633 INFO L131 PetriNetUnfolder]: For 2023/2033 co-relation queries the response was YES. [2022-10-17 11:02:02,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14478 conditions, 6727 events. 3323/6727 cut-off events. For 2023/2033 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 56000 event pairs, 1227 based on Foata normal form. 10/6146 useless extension candidates. Maximal degree in co-relation 14385. Up to 2718 conditions per place. [2022-10-17 11:02:02,753 INFO L137 encePairwiseOnDemand]: 67/74 looper letters, 94 selfloop transitions, 19 changer transitions 0/149 dead transitions. [2022-10-17 11:02:02,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 149 transitions, 694 flow [2022-10-17 11:02:02,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 11:02:02,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 11:02:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 341 transitions. [2022-10-17 11:02:02,756 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7680180180180181 [2022-10-17 11:02:02,763 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 341 transitions. [2022-10-17 11:02:02,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 341 transitions. [2022-10-17 11:02:02,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:02:02,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 341 transitions. [2022-10-17 11:02:02,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.833333333333336) internal successors, (341), 6 states have internal predecessors, (341), 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) [2022-10-17 11:02:02,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 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) [2022-10-17 11:02:02,769 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 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) [2022-10-17 11:02:02,769 INFO L175 Difference]: Start difference. First operand has 80 places, 79 transitions, 240 flow. Second operand 6 states and 341 transitions. [2022-10-17 11:02:02,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 149 transitions, 694 flow [2022-10-17 11:02:02,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 149 transitions, 694 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 11:02:02,796 INFO L231 Difference]: Finished difference. Result has 87 places, 91 transitions, 370 flow [2022-10-17 11:02:02,796 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=87, PETRI_TRANSITIONS=91} [2022-10-17 11:02:02,799 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 10 predicate places. [2022-10-17 11:02:02,800 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 91 transitions, 370 flow [2022-10-17 11:02:02,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 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) [2022-10-17 11:02:02,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:02:02,801 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:02,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 11:02:02,801 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 11:02:02,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:02,802 INFO L85 PathProgramCache]: Analyzing trace with hash 670576747, now seen corresponding path program 1 times [2022-10-17 11:02:02,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:02,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61828276] [2022-10-17 11:02:02,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:02,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 11:02:02,835 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 11:02:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 11:02:02,869 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 11:02:02,869 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 11:02:02,869 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-10-17 11:02:02,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-10-17 11:02:02,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-10-17 11:02:02,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-10-17 11:02:02,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-10-17 11:02:02,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 11:02:02,871 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-10-17 11:02:02,872 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 11:02:02,872 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-10-17 11:02:02,933 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 11:02:02,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 89 transitions, 210 flow [2022-10-17 11:02:02,967 INFO L130 PetriNetUnfolder]: 9/139 cut-off events. [2022-10-17 11:02:02,968 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-10-17 11:02:02,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 139 events. 9/139 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 297 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 119. Up to 10 conditions per place. [2022-10-17 11:02:02,969 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 89 transitions, 210 flow [2022-10-17 11:02:02,972 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 89 transitions, 210 flow [2022-10-17 11:02:02,973 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:02:02,978 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;@1908c011, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:02:02,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-10-17 11:02:02,983 INFO L130 PetriNetUnfolder]: 2/52 cut-off events. [2022-10-17 11:02:02,983 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 11:02:02,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:02:02,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:02,984 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-10-17 11:02:02,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:02,985 INFO L85 PathProgramCache]: Analyzing trace with hash -781406249, now seen corresponding path program 1 times [2022-10-17 11:02:02,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:02,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395173467] [2022-10-17 11:02:02,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:02,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:03,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:03,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395173467] [2022-10-17 11:02:03,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395173467] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:03,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:03,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 11:02:03,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121310134] [2022-10-17 11:02:03,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:03,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:02:03,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:03,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:02:03,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:02:03,234 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 89 [2022-10-17 11:02:03,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 89 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 46.8) internal successors, (234), 5 states have internal predecessors, (234), 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) [2022-10-17 11:02:03,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:02:03,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 89 [2022-10-17 11:02:03,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:02:14,679 INFO L130 PetriNetUnfolder]: 44351/70797 cut-off events. [2022-10-17 11:02:14,679 INFO L131 PetriNetUnfolder]: For 15385/15385 co-relation queries the response was YES. [2022-10-17 11:02:15,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139247 conditions, 70797 events. 44351/70797 cut-off events. For 15385/15385 co-relation queries the response was YES. Maximal size of possible extension queue 3210. Compared 618625 event pairs, 21629 based on Foata normal form. 17293/74856 useless extension candidates. Maximal degree in co-relation 58478. Up to 30317 conditions per place. [2022-10-17 11:02:15,566 INFO L137 encePairwiseOnDemand]: 75/89 looper letters, 126 selfloop transitions, 15 changer transitions 0/181 dead transitions. [2022-10-17 11:02:15,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 181 transitions, 750 flow [2022-10-17 11:02:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 11:02:15,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 11:02:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2022-10-17 11:02:15,570 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8033707865168539 [2022-10-17 11:02:15,570 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2022-10-17 11:02:15,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2022-10-17 11:02:15,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:02:15,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2022-10-17 11:02:15,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 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) [2022-10-17 11:02:15,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 89.0) internal successors, (623), 7 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) [2022-10-17 11:02:15,576 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 89.0) internal successors, (623), 7 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) [2022-10-17 11:02:15,576 INFO L175 Difference]: Start difference. First operand has 93 places, 89 transitions, 210 flow. Second operand 6 states and 429 transitions. [2022-10-17 11:02:15,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 181 transitions, 750 flow [2022-10-17 11:02:15,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 181 transitions, 714 flow, removed 18 selfloop flow, removed 0 redundant places. [2022-10-17 11:02:15,589 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 302 flow [2022-10-17 11:02:15,589 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2022-10-17 11:02:15,591 INFO L287 CegarLoopForPetriNet]: 93 programPoint places, 3 predicate places. [2022-10-17 11:02:15,591 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 302 flow [2022-10-17 11:02:15,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.8) internal successors, (234), 5 states have internal predecessors, (234), 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) [2022-10-17 11:02:15,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:02:15,592 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:15,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 11:02:15,592 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-10-17 11:02:15,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:15,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1373759277, now seen corresponding path program 1 times [2022-10-17 11:02:15,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:15,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993614458] [2022-10-17 11:02:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:15,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 11:02:15,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:15,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993614458] [2022-10-17 11:02:15,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993614458] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:15,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:15,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 11:02:15,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088687406] [2022-10-17 11:02:15,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:15,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:02:15,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:15,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:02:15,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:02:15,791 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 89 [2022-10-17 11:02:15,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 302 flow. Second operand has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 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) [2022-10-17 11:02:15,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:02:15,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 89 [2022-10-17 11:02:15,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand