./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 16:57:56,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:57:56,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:57:56,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:57:56,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:57:56,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:57:56,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:57:56,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:57:56,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:57:56,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:57:56,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:57:56,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:57:56,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:57:56,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:57:56,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:57:56,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:57:56,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:57:56,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:57:56,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:57:56,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:57:56,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:57:56,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:57:56,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:57:56,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:57:56,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:57:56,519 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:57:56,519 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:57:56,520 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:57:56,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:57:56,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:57:56,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:57:56,523 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:57:56,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:57:56,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:57:56,525 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:57:56,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:57:56,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:57:56,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:57:56,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:57:56,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:57:56,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:57:56,537 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 16:57:56,558 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:57:56,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:57:56,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:57:56,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:57:56,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:57:56,560 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:57:56,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:57:56,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:57:56,561 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:57:56,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:57:56,562 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:57:56,562 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 16:57:56,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:57:56,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:57:56,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:57:56,563 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 16:57:56,563 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 16:57:56,564 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 16:57:56,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:57:56,564 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 16:57:56,564 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:57:56,565 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:57:56,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:57:56,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:57:56,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:57:56,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:57:56,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:57:56,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:57:56,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:57:56,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:57:56,567 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:57:56,568 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:57:56,568 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:57:56,568 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_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c [2022-11-25 16:57:56,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:57:56,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:57:56,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:57:56,908 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:57:56,908 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:57:56,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-11-25 16:57:59,967 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:58:00,318 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:58:00,318 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-11-25 16:58:00,342 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/data/0af4eaafe/1e6fe9c21ca6470684988e3bfbb2942d/FLAGa802c6019 [2022-11-25 16:58:00,366 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/data/0af4eaafe/1e6fe9c21ca6470684988e3bfbb2942d [2022-11-25 16:58:00,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:58:00,375 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:58:00,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:58:00,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:58:00,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:58:00,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:58:00" (1/1) ... [2022-11-25 16:58:00,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@348c84cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:00, skipping insertion in model container [2022-11-25 16:58:00,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:58:00" (1/1) ... [2022-11-25 16:58:00,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:58:00,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:58:00,789 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_3f237292-151c-4bf7-89ef-5753697df0db/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2022-11-25 16:58:00,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:58:00,821 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:58:00,854 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_3f237292-151c-4bf7-89ef-5753697df0db/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2022-11-25 16:58:00,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:58:00,898 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:58:00,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:00 WrapperNode [2022-11-25 16:58:00,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:58:00,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:58:00,900 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:58:00,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:58:00,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:00" (1/1) ... [2022-11-25 16:58:00,920 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:00" (1/1) ... [2022-11-25 16:58:00,940 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-11-25 16:58:00,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:58:00,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:58:00,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:58:00,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:58:00,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:00" (1/1) ... [2022-11-25 16:58:00,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:00" (1/1) ... [2022-11-25 16:58:00,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:00" (1/1) ... [2022-11-25 16:58:00,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:00" (1/1) ... [2022-11-25 16:58:00,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:00" (1/1) ... [2022-11-25 16:58:00,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:00" (1/1) ... [2022-11-25 16:58:00,969 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:00" (1/1) ... [2022-11-25 16:58:00,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:00" (1/1) ... [2022-11-25 16:58:00,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:58:00,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:58:00,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:58:00,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:58:00,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:00" (1/1) ... [2022-11-25 16:58:01,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:58:01,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:58:01,035 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:58:01,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:58:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 16:58:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:58:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 16:58:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:58:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:58:01,077 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 16:58:01,077 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 16:58:01,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:58:01,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:58:01,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:58:01,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:58:01,079 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 16:58:01,221 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:58:01,223 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:58:01,446 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:58:01,453 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:58:01,454 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-25 16:58:01,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:58:01 BoogieIcfgContainer [2022-11-25 16:58:01,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:58:01,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:58:01,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:58:01,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:58:01,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:58:00" (1/3) ... [2022-11-25 16:58:01,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca4783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:58:01, skipping insertion in model container [2022-11-25 16:58:01,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:00" (2/3) ... [2022-11-25 16:58:01,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca4783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:58:01, skipping insertion in model container [2022-11-25 16:58:01,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:58:01" (3/3) ... [2022-11-25 16:58:01,475 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2022-11-25 16:58:01,498 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:58:01,499 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-11-25 16:58:01,499 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 16:58:01,616 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 16:58:01,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 119 transitions, 243 flow [2022-11-25 16:58:01,754 INFO L130 PetriNetUnfolder]: 14/157 cut-off events. [2022-11-25 16:58:01,754 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:58:01,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 157 events. 14/157 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 439 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2022-11-25 16:58:01,761 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 119 transitions, 243 flow [2022-11-25 16:58:01,768 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 119 transitions, 243 flow [2022-11-25 16:58:01,772 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:58:01,821 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 119 transitions, 243 flow [2022-11-25 16:58:01,824 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 119 transitions, 243 flow [2022-11-25 16:58:01,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 119 transitions, 243 flow [2022-11-25 16:58:01,927 INFO L130 PetriNetUnfolder]: 14/157 cut-off events. [2022-11-25 16:58:01,928 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:58:01,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 157 events. 14/157 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 439 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2022-11-25 16:58:01,932 INFO L119 LiptonReduction]: Number of co-enabled transitions 3520 [2022-11-25 16:58:06,581 INFO L134 LiptonReduction]: Checked pairs total: 7961 [2022-11-25 16:58:06,582 INFO L136 LiptonReduction]: Total number of compositions: 116 [2022-11-25 16:58:06,600 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:58:06,607 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@1cdddb9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:58:06,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-11-25 16:58:06,610 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-11-25 16:58:06,610 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:58:06,610 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:06,611 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 16:58:06,612 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 16:58:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:06,616 INFO L85 PathProgramCache]: Analyzing trace with hash 14945, now seen corresponding path program 1 times [2022-11-25 16:58:06,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:06,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136286407] [2022-11-25 16:58:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:06,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:06,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:06,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136286407] [2022-11-25 16:58:06,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136286407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:06,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:06,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:58:06,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075160680] [2022-11-25 16:58:06,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:06,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:58:06,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:06,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:58:06,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:58:07,010 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 235 [2022-11-25 16:58:07,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 44 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:07,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:07,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 235 [2022-11-25 16:58:07,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:07,182 INFO L130 PetriNetUnfolder]: 144/376 cut-off events. [2022-11-25 16:58:07,182 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:58:07,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 376 events. 144/376 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1884 event pairs, 108 based on Foata normal form. 13/270 useless extension candidates. Maximal degree in co-relation 673. Up to 247 conditions per place. [2022-11-25 16:58:07,192 INFO L137 encePairwiseOnDemand]: 222/235 looper letters, 36 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2022-11-25 16:58:07,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 171 flow [2022-11-25 16:58:07,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:58:07,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:58:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2022-11-25 16:58:07,217 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2022-11-25 16:58:07,218 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2022-11-25 16:58:07,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2022-11-25 16:58:07,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:07,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2022-11-25 16:58:07,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:07,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:07,237 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:07,239 INFO L175 Difference]: Start difference. First operand has 39 places, 44 transitions, 93 flow. Second operand 3 states and 360 transitions. [2022-11-25 16:58:07,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 171 flow [2022-11-25 16:58:07,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 45 transitions, 171 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 16:58:07,245 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 75 flow [2022-11-25 16:58:07,247 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2022-11-25 16:58:07,251 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -1 predicate places. [2022-11-25 16:58:07,251 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 75 flow [2022-11-25 16:58:07,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:07,252 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:07,252 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 16:58:07,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:58:07,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 16:58:07,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:07,254 INFO L85 PathProgramCache]: Analyzing trace with hash 14943, now seen corresponding path program 1 times [2022-11-25 16:58:07,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:07,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654601288] [2022-11-25 16:58:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:07,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:07,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:07,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654601288] [2022-11-25 16:58:07,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654601288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:07,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:07,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:58:07,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191925076] [2022-11-25 16:58:07,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:07,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:58:07,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:07,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:58:07,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:58:07,445 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 235 [2022-11-25 16:58:07,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:07,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:07,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 235 [2022-11-25 16:58:07,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:07,587 INFO L130 PetriNetUnfolder]: 144/346 cut-off events. [2022-11-25 16:58:07,588 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:58:07,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 346 events. 144/346 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1888 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 655. Up to 301 conditions per place. [2022-11-25 16:58:07,590 INFO L137 encePairwiseOnDemand]: 231/235 looper letters, 37 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2022-11-25 16:58:07,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 46 transitions, 179 flow [2022-11-25 16:58:07,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:58:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:58:07,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 347 transitions. [2022-11-25 16:58:07,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4921985815602837 [2022-11-25 16:58:07,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 347 transitions. [2022-11-25 16:58:07,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 347 transitions. [2022-11-25 16:58:07,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:07,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 347 transitions. [2022-11-25 16:58:07,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:07,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:07,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:07,598 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 75 flow. Second operand 3 states and 347 transitions. [2022-11-25 16:58:07,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 46 transitions, 179 flow [2022-11-25 16:58:07,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 46 transitions, 175 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 16:58:07,601 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 81 flow [2022-11-25 16:58:07,601 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2022-11-25 16:58:07,602 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2022-11-25 16:58:07,602 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 81 flow [2022-11-25 16:58:07,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:07,603 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:07,603 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 16:58:07,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 16:58:07,603 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 16:58:07,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:07,604 INFO L85 PathProgramCache]: Analyzing trace with hash 445519415, now seen corresponding path program 1 times [2022-11-25 16:58:07,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:07,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504979946] [2022-11-25 16:58:07,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:07,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:07,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:07,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504979946] [2022-11-25 16:58:07,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504979946] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:58:07,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322105663] [2022-11-25 16:58:07,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:07,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:07,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:58:07,742 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:58:07,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:58:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:07,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 16:58:07,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:58:07,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:58:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:07,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:58:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:08,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322105663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:58:08,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:58:08,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 16:58:08,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632754491] [2022-11-25 16:58:08,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:58:08,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 16:58:08,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:08,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 16:58:08,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:58:08,252 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 235 [2022-11-25 16:58:08,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 81 flow. Second operand has 7 states, 7 states have (on average 100.71428571428571) internal successors, (705), 7 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:08,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:08,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 235 [2022-11-25 16:58:08,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:08,345 INFO L130 PetriNetUnfolder]: 24/80 cut-off events. [2022-11-25 16:58:08,345 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-25 16:58:08,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 80 events. 24/80 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 203 event pairs, 11 based on Foata normal form. 13/81 useless extension candidates. Maximal degree in co-relation 163. Up to 50 conditions per place. [2022-11-25 16:58:08,346 INFO L137 encePairwiseOnDemand]: 231/235 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2022-11-25 16:58:08,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 139 flow [2022-11-25 16:58:08,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:58:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 16:58:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 427 transitions. [2022-11-25 16:58:08,349 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4542553191489362 [2022-11-25 16:58:08,349 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 427 transitions. [2022-11-25 16:58:08,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 427 transitions. [2022-11-25 16:58:08,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:08,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 427 transitions. [2022-11-25 16:58:08,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:08,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:08,354 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:08,354 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 81 flow. Second operand 4 states and 427 transitions. [2022-11-25 16:58:08,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 139 flow [2022-11-25 16:58:08,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 133 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 16:58:08,356 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 53 flow [2022-11-25 16:58:08,356 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2022-11-25 16:58:08,356 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -11 predicate places. [2022-11-25 16:58:08,357 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 53 flow [2022-11-25 16:58:08,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.71428571428571) internal successors, (705), 7 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:08,358 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:08,358 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 16:58:08,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 16:58:08,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:08,564 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 16:58:08,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:08,565 INFO L85 PathProgramCache]: Analyzing trace with hash 926200329, now seen corresponding path program 1 times [2022-11-25 16:58:08,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:08,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133061138] [2022-11-25 16:58:08,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:08,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:58:08,583 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 16:58:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:58:08,609 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 16:58:08,609 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 16:58:08,611 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (22 of 23 remaining) [2022-11-25 16:58:08,613 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2022-11-25 16:58:08,613 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2022-11-25 16:58:08,613 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2022-11-25 16:58:08,613 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2022-11-25 16:58:08,614 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (17 of 23 remaining) [2022-11-25 16:58:08,614 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 23 remaining) [2022-11-25 16:58:08,614 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2022-11-25 16:58:08,614 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2022-11-25 16:58:08,615 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 23 remaining) [2022-11-25 16:58:08,615 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 23 remaining) [2022-11-25 16:58:08,615 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 23 remaining) [2022-11-25 16:58:08,615 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2022-11-25 16:58:08,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2022-11-25 16:58:08,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 23 remaining) [2022-11-25 16:58:08,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 23 remaining) [2022-11-25 16:58:08,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2022-11-25 16:58:08,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2022-11-25 16:58:08,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2022-11-25 16:58:08,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2022-11-25 16:58:08,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 23 remaining) [2022-11-25 16:58:08,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2022-11-25 16:58:08,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2022-11-25 16:58:08,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 16:58:08,618 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-25 16:58:08,621 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 16:58:08,621 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 16:58:08,641 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 16:58:08,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 160 transitions, 332 flow [2022-11-25 16:58:08,690 INFO L130 PetriNetUnfolder]: 24/241 cut-off events. [2022-11-25 16:58:08,691 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:58:08,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 241 events. 24/241 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 801 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 158. Up to 6 conditions per place. [2022-11-25 16:58:08,694 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 160 transitions, 332 flow [2022-11-25 16:58:08,697 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 160 transitions, 332 flow [2022-11-25 16:58:08,697 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:58:08,697 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 160 transitions, 332 flow [2022-11-25 16:58:08,698 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 160 transitions, 332 flow [2022-11-25 16:58:08,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 160 transitions, 332 flow [2022-11-25 16:58:08,735 INFO L130 PetriNetUnfolder]: 24/241 cut-off events. [2022-11-25 16:58:08,735 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:58:08,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 241 events. 24/241 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 801 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 158. Up to 6 conditions per place. [2022-11-25 16:58:08,744 INFO L119 LiptonReduction]: Number of co-enabled transitions 10320 [2022-11-25 16:58:13,701 INFO L134 LiptonReduction]: Checked pairs total: 27116 [2022-11-25 16:58:13,701 INFO L136 LiptonReduction]: Total number of compositions: 152 [2022-11-25 16:58:13,704 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:58:13,705 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@1cdddb9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:58:13,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-11-25 16:58:13,707 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-11-25 16:58:13,707 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:58:13,707 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:13,707 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 16:58:13,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 16:58:13,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:13,708 INFO L85 PathProgramCache]: Analyzing trace with hash 26237, now seen corresponding path program 1 times [2022-11-25 16:58:13,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:13,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694458213] [2022-11-25 16:58:13,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:13,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:13,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:13,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694458213] [2022-11-25 16:58:13,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694458213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:13,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:13,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:58:13,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199322861] [2022-11-25 16:58:13,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:13,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:58:13,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:13,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:58:13,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:58:13,800 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 312 [2022-11-25 16:58:13,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 71 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:13,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:13,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 312 [2022-11-25 16:58:13,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:14,847 INFO L130 PetriNetUnfolder]: 4706/7894 cut-off events. [2022-11-25 16:58:14,848 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-11-25 16:58:14,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15400 conditions, 7894 events. 4706/7894 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 56694 event pairs, 3575 based on Foata normal form. 377/5799 useless extension candidates. Maximal degree in co-relation 10248. Up to 5684 conditions per place. [2022-11-25 16:58:14,892 INFO L137 encePairwiseOnDemand]: 291/312 looper letters, 65 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2022-11-25 16:58:14,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 78 transitions, 302 flow [2022-11-25 16:58:14,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:58:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:58:14,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 507 transitions. [2022-11-25 16:58:14,900 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2022-11-25 16:58:14,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 507 transitions. [2022-11-25 16:58:14,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 507 transitions. [2022-11-25 16:58:14,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:14,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 507 transitions. [2022-11-25 16:58:14,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:14,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:14,905 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:14,905 INFO L175 Difference]: Start difference. First operand has 62 places, 71 transitions, 154 flow. Second operand 3 states and 507 transitions. [2022-11-25 16:58:14,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 78 transitions, 302 flow [2022-11-25 16:58:14,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 78 transitions, 300 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 16:58:14,909 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 118 flow [2022-11-25 16:58:14,909 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2022-11-25 16:58:14,911 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2022-11-25 16:58:14,911 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 118 flow [2022-11-25 16:58:14,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:14,912 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:14,912 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 16:58:14,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 16:58:14,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 16:58:14,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:14,915 INFO L85 PathProgramCache]: Analyzing trace with hash 26236, now seen corresponding path program 1 times [2022-11-25 16:58:14,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:14,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625027184] [2022-11-25 16:58:14,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:14,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:15,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:15,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625027184] [2022-11-25 16:58:15,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625027184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:15,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:15,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:58:15,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046659974] [2022-11-25 16:58:15,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:15,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:58:15,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:15,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:58:15,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:58:15,079 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 312 [2022-11-25 16:58:15,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:15,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:15,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 312 [2022-11-25 16:58:15,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:15,997 INFO L130 PetriNetUnfolder]: 4706/7921 cut-off events. [2022-11-25 16:58:15,997 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2022-11-25 16:58:16,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15624 conditions, 7921 events. 4706/7921 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 55855 event pairs, 4307 based on Foata normal form. 0/5471 useless extension candidates. Maximal degree in co-relation 11809. Up to 7423 conditions per place. [2022-11-25 16:58:16,047 INFO L137 encePairwiseOnDemand]: 308/312 looper letters, 54 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2022-11-25 16:58:16,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 260 flow [2022-11-25 16:58:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:58:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:58:16,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2022-11-25 16:58:16,050 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49786324786324787 [2022-11-25 16:58:16,050 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2022-11-25 16:58:16,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2022-11-25 16:58:16,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:16,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2022-11-25 16:58:16,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:16,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:16,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:16,085 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 118 flow. Second operand 3 states and 466 transitions. [2022-11-25 16:58:16,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 260 flow [2022-11-25 16:58:16,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 16:58:16,091 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 128 flow [2022-11-25 16:58:16,091 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2022-11-25 16:58:16,092 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -2 predicate places. [2022-11-25 16:58:16,092 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 128 flow [2022-11-25 16:58:16,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:16,093 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:16,093 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 16:58:16,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 16:58:16,093 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 16:58:16,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:16,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1521492540, now seen corresponding path program 1 times [2022-11-25 16:58:16,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:16,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833075008] [2022-11-25 16:58:16,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:16,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:16,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:16,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833075008] [2022-11-25 16:58:16,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833075008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:16,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:16,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:58:16,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294087519] [2022-11-25 16:58:16,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:16,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:58:16,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:16,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:58:16,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:58:16,316 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 312 [2022-11-25 16:58:16,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 130.25) internal successors, (521), 4 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:16,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:16,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 312 [2022-11-25 16:58:16,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:16,955 INFO L130 PetriNetUnfolder]: 3432/5829 cut-off events. [2022-11-25 16:58:16,956 INFO L131 PetriNetUnfolder]: For 341/341 co-relation queries the response was YES. [2022-11-25 16:58:16,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11820 conditions, 5829 events. 3432/5829 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 39358 event pairs, 2882 based on Foata normal form. 325/4623 useless extension candidates. Maximal degree in co-relation 11730. Up to 4600 conditions per place. [2022-11-25 16:58:16,984 INFO L137 encePairwiseOnDemand]: 305/312 looper letters, 57 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2022-11-25 16:58:16,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 71 transitions, 284 flow [2022-11-25 16:58:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:58:16,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 16:58:16,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 583 transitions. [2022-11-25 16:58:16,987 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4671474358974359 [2022-11-25 16:58:16,987 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 583 transitions. [2022-11-25 16:58:16,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 583 transitions. [2022-11-25 16:58:16,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:16,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 583 transitions. [2022-11-25 16:58:16,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:16,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:16,992 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:16,992 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 128 flow. Second operand 4 states and 583 transitions. [2022-11-25 16:58:16,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 71 transitions, 284 flow [2022-11-25 16:58:16,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:58:16,995 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 124 flow [2022-11-25 16:58:16,995 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2022-11-25 16:58:16,995 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -4 predicate places. [2022-11-25 16:58:16,996 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 124 flow [2022-11-25 16:58:16,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.25) internal successors, (521), 4 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:16,996 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:16,996 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 16:58:16,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 16:58:16,997 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 16:58:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:16,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1521713382, now seen corresponding path program 1 times [2022-11-25 16:58:16,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:16,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433852401] [2022-11-25 16:58:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:16,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:17,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:17,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433852401] [2022-11-25 16:58:17,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433852401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:58:17,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077473048] [2022-11-25 16:58:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:17,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:17,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:58:17,146 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:58:17,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:58:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:17,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 16:58:17,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:58:17,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:58:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:17,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:58:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:17,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077473048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:58:17,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:58:17,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 16:58:17,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786087279] [2022-11-25 16:58:17,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:58:17,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 16:58:17,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 16:58:17,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:58:17,565 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 312 [2022-11-25 16:58:17,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 124 flow. Second operand has 7 states, 7 states have (on average 134.71428571428572) internal successors, (943), 7 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:17,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:17,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 312 [2022-11-25 16:58:17,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:18,336 INFO L130 PetriNetUnfolder]: 3058/5156 cut-off events. [2022-11-25 16:58:18,337 INFO L131 PetriNetUnfolder]: For 194/194 co-relation queries the response was YES. [2022-11-25 16:58:18,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10758 conditions, 5156 events. 3058/5156 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 35822 event pairs, 130 based on Foata normal form. 12/4002 useless extension candidates. Maximal degree in co-relation 8828. Up to 3672 conditions per place. [2022-11-25 16:58:18,362 INFO L137 encePairwiseOnDemand]: 306/312 looper letters, 89 selfloop transitions, 5 changer transitions 0/105 dead transitions. [2022-11-25 16:58:18,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 105 transitions, 422 flow [2022-11-25 16:58:18,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:58:18,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:58:18,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 762 transitions. [2022-11-25 16:58:18,365 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48846153846153845 [2022-11-25 16:58:18,365 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 762 transitions. [2022-11-25 16:58:18,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 762 transitions. [2022-11-25 16:58:18,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:18,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 762 transitions. [2022-11-25 16:58:18,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.4) internal successors, (762), 5 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:18,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 312.0) internal successors, (1872), 6 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:18,371 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 312.0) internal successors, (1872), 6 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:18,372 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 124 flow. Second operand 5 states and 762 transitions. [2022-11-25 16:58:18,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 105 transitions, 422 flow [2022-11-25 16:58:18,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 105 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 16:58:18,395 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 130 flow [2022-11-25 16:58:18,395 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=130, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2022-11-25 16:58:18,396 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -2 predicate places. [2022-11-25 16:58:18,397 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 130 flow [2022-11-25 16:58:18,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 134.71428571428572) internal successors, (943), 7 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:18,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:18,398 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:58:18,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 16:58:18,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f237292-151c-4bf7-89ef-5753697df0db/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 16:58:18,605 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 16:58:18,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:18,605 INFO L85 PathProgramCache]: Analyzing trace with hash 78367260, now seen corresponding path program 1 times [2022-11-25 16:58:18,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:18,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596784424] [2022-11-25 16:58:18,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:18,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:18,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:18,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596784424] [2022-11-25 16:58:18,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596784424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:18,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:18,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:58:18,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276063904] [2022-11-25 16:58:18,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:18,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:58:18,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:18,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:58:18,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:58:18,795 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 312 [2022-11-25 16:58:18,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:18,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:18,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 312 [2022-11-25 16:58:18,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:19,400 INFO L130 PetriNetUnfolder]: 3050/5174 cut-off events. [2022-11-25 16:58:19,400 INFO L131 PetriNetUnfolder]: For 929/929 co-relation queries the response was YES. [2022-11-25 16:58:19,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12170 conditions, 5174 events. 3050/5174 cut-off events. For 929/929 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 32249 event pairs, 1788 based on Foata normal form. 0/4271 useless extension candidates. Maximal degree in co-relation 9495. Up to 2480 conditions per place. [2022-11-25 16:58:19,427 INFO L137 encePairwiseOnDemand]: 294/312 looper letters, 69 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2022-11-25 16:58:19,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 86 transitions, 370 flow [2022-11-25 16:58:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:58:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 16:58:19,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 566 transitions. [2022-11-25 16:58:19,430 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.453525641025641 [2022-11-25 16:58:19,430 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 566 transitions. [2022-11-25 16:58:19,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 566 transitions. [2022-11-25 16:58:19,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:19,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 566 transitions. [2022-11-25 16:58:19,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:19,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:19,435 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:19,435 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 130 flow. Second operand 4 states and 566 transitions. [2022-11-25 16:58:19,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 86 transitions, 370 flow [2022-11-25 16:58:19,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 356 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-11-25 16:58:19,451 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 224 flow [2022-11-25 16:58:19,451 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2022-11-25 16:58:19,452 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, 1 predicate places. [2022-11-25 16:58:19,452 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 224 flow [2022-11-25 16:58:19,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:19,453 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:19,453 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 16:58:19,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 16:58:19,453 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 16:58:19,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:19,454 INFO L85 PathProgramCache]: Analyzing trace with hash -797829081, now seen corresponding path program 1 times [2022-11-25 16:58:19,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:19,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281258031] [2022-11-25 16:58:19,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:19,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:58:19,466 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 16:58:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:58:19,480 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 16:58:19,480 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 16:58:19,480 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (30 of 31 remaining) [2022-11-25 16:58:19,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 31 remaining) [2022-11-25 16:58:19,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 31 remaining) [2022-11-25 16:58:19,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 31 remaining) [2022-11-25 16:58:19,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 31 remaining) [2022-11-25 16:58:19,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (25 of 31 remaining) [2022-11-25 16:58:19,482 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 31 remaining) [2022-11-25 16:58:19,482 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 31 remaining) [2022-11-25 16:58:19,482 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 31 remaining) [2022-11-25 16:58:19,482 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 31 remaining) [2022-11-25 16:58:19,482 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 31 remaining) [2022-11-25 16:58:19,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 31 remaining) [2022-11-25 16:58:19,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 31 remaining) [2022-11-25 16:58:19,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 31 remaining) [2022-11-25 16:58:19,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 31 remaining) [2022-11-25 16:58:19,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 31 remaining) [2022-11-25 16:58:19,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 31 remaining) [2022-11-25 16:58:19,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 31 remaining) [2022-11-25 16:58:19,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 31 remaining) [2022-11-25 16:58:19,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 31 remaining) [2022-11-25 16:58:19,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 31 remaining) [2022-11-25 16:58:19,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 31 remaining) [2022-11-25 16:58:19,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 31 remaining) [2022-11-25 16:58:19,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 31 remaining) [2022-11-25 16:58:19,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 31 remaining) [2022-11-25 16:58:19,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 31 remaining) [2022-11-25 16:58:19,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 31 remaining) [2022-11-25 16:58:19,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 31 remaining) [2022-11-25 16:58:19,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 31 remaining) [2022-11-25 16:58:19,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 31 remaining) [2022-11-25 16:58:19,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 31 remaining) [2022-11-25 16:58:19,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 16:58:19,487 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-25 16:58:19,487 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 16:58:19,488 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 16:58:19,508 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 16:58:19,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 201 transitions, 423 flow [2022-11-25 16:58:19,547 INFO L130 PetriNetUnfolder]: 34/325 cut-off events. [2022-11-25 16:58:19,548 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 16:58:19,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 325 events. 34/325 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1164 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 245. Up to 8 conditions per place. [2022-11-25 16:58:19,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 201 transitions, 423 flow [2022-11-25 16:58:19,553 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 201 transitions, 423 flow [2022-11-25 16:58:19,554 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:58:19,554 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 201 transitions, 423 flow [2022-11-25 16:58:19,554 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 201 transitions, 423 flow [2022-11-25 16:58:19,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 201 transitions, 423 flow [2022-11-25 16:58:19,592 INFO L130 PetriNetUnfolder]: 34/325 cut-off events. [2022-11-25 16:58:19,593 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 16:58:19,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 325 events. 34/325 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1164 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 245. Up to 8 conditions per place. [2022-11-25 16:58:19,607 INFO L119 LiptonReduction]: Number of co-enabled transitions 20400 [2022-11-25 16:58:24,959 INFO L134 LiptonReduction]: Checked pairs total: 53222 [2022-11-25 16:58:24,959 INFO L136 LiptonReduction]: Total number of compositions: 189 [2022-11-25 16:58:24,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:58:24,962 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@1cdddb9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:58:24,962 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-11-25 16:58:24,964 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-11-25 16:58:24,964 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:58:24,964 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:24,964 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 16:58:24,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-25 16:58:24,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:24,965 INFO L85 PathProgramCache]: Analyzing trace with hash 40006, now seen corresponding path program 1 times [2022-11-25 16:58:24,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:24,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144455906] [2022-11-25 16:58:24,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:24,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:25,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:25,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144455906] [2022-11-25 16:58:25,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144455906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:25,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:25,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:58:25,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878525242] [2022-11-25 16:58:25,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:25,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:58:25,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:25,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:58:25,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:58:25,085 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 390 [2022-11-25 16:58:25,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 97 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:25,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:25,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 390 [2022-11-25 16:58:25,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:36,985 INFO L130 PetriNetUnfolder]: 101530/144879 cut-off events. [2022-11-25 16:58:36,985 INFO L131 PetriNetUnfolder]: For 1345/1345 co-relation queries the response was YES. [2022-11-25 16:58:37,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285800 conditions, 144879 events. 101530/144879 cut-off events. For 1345/1345 co-relation queries the response was YES. Maximal size of possible extension queue 4723. Compared 1155561 event pairs, 77467 based on Foata normal form. 8021/107583 useless extension candidates. Maximal degree in co-relation 41573. Up to 107016 conditions per place. [2022-11-25 16:58:38,087 INFO L137 encePairwiseOnDemand]: 361/390 looper letters, 92 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2022-11-25 16:58:38,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 109 transitions, 427 flow [2022-11-25 16:58:38,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:58:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:58:38,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 652 transitions. [2022-11-25 16:58:38,091 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5572649572649573 [2022-11-25 16:58:38,091 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 652 transitions. [2022-11-25 16:58:38,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 652 transitions. [2022-11-25 16:58:38,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:38,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 652 transitions. [2022-11-25 16:58:38,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:38,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:38,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:38,096 INFO L175 Difference]: Start difference. First operand has 84 places, 97 transitions, 215 flow. Second operand 3 states and 652 transitions. [2022-11-25 16:58:38,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 109 transitions, 427 flow [2022-11-25 16:58:38,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 421 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-25 16:58:38,103 INFO L231 Difference]: Finished difference. Result has 79 places, 70 transitions, 159 flow [2022-11-25 16:58:38,104 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=390, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=79, PETRI_TRANSITIONS=70} [2022-11-25 16:58:38,104 INFO L288 CegarLoopForPetriNet]: 84 programPoint places, -5 predicate places. [2022-11-25 16:58:38,105 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 70 transitions, 159 flow [2022-11-25 16:58:38,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:38,105 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:38,105 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 16:58:38,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 16:58:38,106 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-25 16:58:38,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:38,106 INFO L85 PathProgramCache]: Analyzing trace with hash 40005, now seen corresponding path program 1 times [2022-11-25 16:58:38,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:38,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666119919] [2022-11-25 16:58:38,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:38,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:38,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:38,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666119919] [2022-11-25 16:58:38,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666119919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:38,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:38,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:58:38,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039430917] [2022-11-25 16:58:38,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:38,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:58:38,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:38,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:58:38,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:58:38,269 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 390 [2022-11-25 16:58:38,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:38,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:38,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 390 [2022-11-25 16:58:38,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:50,015 INFO L130 PetriNetUnfolder]: 101530/146953 cut-off events. [2022-11-25 16:58:50,015 INFO L131 PetriNetUnfolder]: For 3402/3402 co-relation queries the response was YES. [2022-11-25 16:58:50,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290536 conditions, 146953 events. 101530/146953 cut-off events. For 3402/3402 co-relation queries the response was YES. Maximal size of possible extension queue 4745. Compared 1179769 event pairs, 65884 based on Foata normal form. 0/101357 useless extension candidates. Maximal degree in co-relation 220211. Up to 139919 conditions per place. [2022-11-25 16:58:51,088 INFO L137 encePairwiseOnDemand]: 386/390 looper letters, 68 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2022-11-25 16:58:51,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 85 transitions, 329 flow [2022-11-25 16:58:51,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:58:51,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:58:51,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 582 transitions. [2022-11-25 16:58:51,091 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49743589743589745 [2022-11-25 16:58:51,091 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 582 transitions. [2022-11-25 16:58:51,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 582 transitions. [2022-11-25 16:58:51,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:51,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 582 transitions. [2022-11-25 16:58:51,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:51,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:51,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:51,097 INFO L175 Difference]: Start difference. First operand has 79 places, 70 transitions, 159 flow. Second operand 3 states and 582 transitions. [2022-11-25 16:58:51,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 85 transitions, 329 flow [2022-11-25 16:58:51,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 325 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 16:58:51,258 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 169 flow [2022-11-25 16:58:51,258 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=390, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2022-11-25 16:58:51,259 INFO L288 CegarLoopForPetriNet]: 84 programPoint places, -4 predicate places. [2022-11-25 16:58:51,259 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 169 flow [2022-11-25 16:58:51,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:51,259 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:51,260 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 16:58:51,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 16:58:51,260 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-25 16:58:51,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:51,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1675556151, now seen corresponding path program 1 times [2022-11-25 16:58:51,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:51,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842864596] [2022-11-25 16:58:51,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:51,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:51,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:51,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842864596] [2022-11-25 16:58:51,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842864596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:51,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:51,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:58:51,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763135858] [2022-11-25 16:58:51,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:51,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:58:51,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:51,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:58:51,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:58:51,510 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 390 [2022-11-25 16:58:51,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:51,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:51,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 390 [2022-11-25 16:58:51,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:58,643 INFO L130 PetriNetUnfolder]: 63624/91899 cut-off events. [2022-11-25 16:58:58,643 INFO L131 PetriNetUnfolder]: For 4191/4191 co-relation queries the response was YES. [2022-11-25 16:58:58,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186189 conditions, 91899 events. 63624/91899 cut-off events. For 4191/4191 co-relation queries the response was YES. Maximal size of possible extension queue 2880. Compared 699969 event pairs, 53570 based on Foata normal form. 5941/73268 useless extension candidates. Maximal degree in co-relation 186098. Up to 74296 conditions per place.