./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8 --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 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 11:30:48,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:30:48,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:30:48,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:30:48,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:30:48,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:30:48,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:30:48,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:30:48,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:30:48,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:30:48,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:30:48,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:30:48,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:30:48,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:30:48,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:30:48,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:30:48,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:30:48,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:30:48,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:30:48,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:30:48,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:30:48,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:30:48,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:30:48,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:30:48,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:30:48,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:30:48,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:30:48,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:30:48,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:30:48,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:30:48,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:30:48,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:30:48,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:30:48,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:30:48,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:30:48,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:30:48,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:30:48,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:30:48,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:30:48,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:30:48,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:30:48,471 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 11:30:48,490 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:30:48,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:30:48,491 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:30:48,491 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:30:48,492 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:30:48,492 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:30:48,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:30:48,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:30:48,493 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:30:48,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:30:48,493 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:30:48,493 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:30:48,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:30:48,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:30:48,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:30:48,494 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:30:48,494 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:30:48,494 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:30:48,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:30:48,495 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:30:48,495 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:30:48,495 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:30:48,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:30:48,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:30:48,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:30:48,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:30:48,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:30:48,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:30:48,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:30:48,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:30:48,496 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:30:48,496 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:30:48,497 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:30:48,497 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:30:48,497 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_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 [2022-12-13 11:30:48,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:30:48,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:30:48,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:30:48,712 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:30:48,712 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:30:48,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i [2022-12-13 11:30:51,250 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:30:51,408 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:30:51,408 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i [2022-12-13 11:30:51,416 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/data/6adbe5f84/378e9ed19414444eb74435c14ebc3cdc/FLAG05adc0b9a [2022-12-13 11:30:51,428 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/data/6adbe5f84/378e9ed19414444eb74435c14ebc3cdc [2022-12-13 11:30:51,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:30:51,431 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:30:51,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:30:51,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:30:51,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:30:51,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:30:51" (1/1) ... [2022-12-13 11:30:51,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b33eb2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:30:51, skipping insertion in model container [2022-12-13 11:30:51,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:30:51" (1/1) ... [2022-12-13 11:30:51,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:30:51,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:30:51,670 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_d86097f7-a60e-4bdf-a091-27d0ef3dc769/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i[30176,30189] [2022-12-13 11:30:51,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:30:51,695 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:30:51,719 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_d86097f7-a60e-4bdf-a091-27d0ef3dc769/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i[30176,30189] [2022-12-13 11:30:51,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:30:51,751 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:30:51,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:30:51 WrapperNode [2022-12-13 11:30:51,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:30:51,752 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:30:51,752 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:30:51,752 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:30:51,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:30:51" (1/1) ... [2022-12-13 11:30:51,768 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:30:51" (1/1) ... [2022-12-13 11:30:51,785 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2022-12-13 11:30:51,785 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:30:51,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:30:51,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:30:51,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:30:51,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:30:51" (1/1) ... [2022-12-13 11:30:51,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:30:51" (1/1) ... [2022-12-13 11:30:51,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:30:51" (1/1) ... [2022-12-13 11:30:51,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:30:51" (1/1) ... [2022-12-13 11:30:51,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:30:51" (1/1) ... [2022-12-13 11:30:51,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:30:51" (1/1) ... [2022-12-13 11:30:51,805 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:30:51" (1/1) ... [2022-12-13 11:30:51,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:30:51" (1/1) ... [2022-12-13 11:30:51,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:30:51,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:30:51,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:30:51,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:30:51,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:30:51" (1/1) ... [2022-12-13 11:30:51,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:30:51,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:30:51,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:30:51,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:30:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 11:30:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:30:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 11:30:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:30:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:30:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 11:30:51,893 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 11:30:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:30:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:30:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:30:51,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:30:51,894 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 11:30:51,994 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:30:51,995 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:30:52,219 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:30:52,224 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:30:52,224 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-13 11:30:52,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:30:52 BoogieIcfgContainer [2022-12-13 11:30:52,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:30:52,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:30:52,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:30:52,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:30:52,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:30:51" (1/3) ... [2022-12-13 11:30:52,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7642bf94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:30:52, skipping insertion in model container [2022-12-13 11:30:52,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:30:51" (2/3) ... [2022-12-13 11:30:52,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7642bf94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:30:52, skipping insertion in model container [2022-12-13 11:30:52,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:30:52" (3/3) ... [2022-12-13 11:30:52,233 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_36-indirect_racefree.i [2022-12-13 11:30:52,248 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:30:52,248 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-12-13 11:30:52,248 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:30:52,307 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 11:30:52,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 135 transitions, 278 flow [2022-12-13 11:30:52,407 INFO L130 PetriNetUnfolder]: 17/182 cut-off events. [2022-12-13 11:30:52,408 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:30:52,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 182 events. 17/182 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 553 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 92. Up to 4 conditions per place. [2022-12-13 11:30:52,414 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 135 transitions, 278 flow [2022-12-13 11:30:52,418 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 135 transitions, 278 flow [2022-12-13 11:30:52,421 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:30:52,430 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 135 transitions, 278 flow [2022-12-13 11:30:52,433 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 135 transitions, 278 flow [2022-12-13 11:30:52,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 135 transitions, 278 flow [2022-12-13 11:30:52,466 INFO L130 PetriNetUnfolder]: 17/182 cut-off events. [2022-12-13 11:30:52,466 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:30:52,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 182 events. 17/182 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 553 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 92. Up to 4 conditions per place. [2022-12-13 11:30:52,469 INFO L119 LiptonReduction]: Number of co-enabled transitions 4240 [2022-12-13 11:30:55,370 INFO L134 LiptonReduction]: Checked pairs total: 9597 [2022-12-13 11:30:55,370 INFO L136 LiptonReduction]: Total number of compositions: 120 [2022-12-13 11:30:55,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:30:55,391 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;@163e3363, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:30:55,392 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-12-13 11:30:55,394 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 11:30:55,394 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:30:55,394 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:30:55,395 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:30:55,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-13 11:30:55,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:30:55,400 INFO L85 PathProgramCache]: Analyzing trace with hash 16414, now seen corresponding path program 1 times [2022-12-13 11:30:55,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:30:55,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169480771] [2022-12-13 11:30:55,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:30:55,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:30:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:30:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:30:55,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:30:55,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169480771] [2022-12-13 11:30:55,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169480771] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:30:55,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:30:55,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:30:55,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703891110] [2022-12-13 11:30:55,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:30:55,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:30:55,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:30:55,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:30:55,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:30:55,748 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 255 [2022-12-13 11:30:55,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 51 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:55,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:30:55,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 255 [2022-12-13 11:30:55,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:30:55,877 INFO L130 PetriNetUnfolder]: 204/466 cut-off events. [2022-12-13 11:30:55,877 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:30:55,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 466 events. 204/466 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2552 event pairs, 0 based on Foata normal form. 18/309 useless extension candidates. Maximal degree in co-relation 879. Up to 433 conditions per place. [2022-12-13 11:30:55,881 INFO L137 encePairwiseOnDemand]: 240/255 looper letters, 45 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2022-12-13 11:30:55,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 208 flow [2022-12-13 11:30:55,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:30:55,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:30:55,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2022-12-13 11:30:55,892 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5437908496732026 [2022-12-13 11:30:55,893 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2022-12-13 11:30:55,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2022-12-13 11:30:55,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:30:55,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2022-12-13 11:30:55,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:55,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:55,905 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:55,906 INFO L175 Difference]: Start difference. First operand has 44 places, 51 transitions, 110 flow. Second operand 3 states and 416 transitions. [2022-12-13 11:30:55,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 208 flow [2022-12-13 11:30:55,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 53 transitions, 208 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 11:30:55,910 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 96 flow [2022-12-13 11:30:55,912 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2022-12-13 11:30:55,915 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2022-12-13 11:30:55,916 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 96 flow [2022-12-13 11:30:55,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:55,916 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:30:55,916 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:30:55,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:30:55,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-13 11:30:55,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:30:55,917 INFO L85 PathProgramCache]: Analyzing trace with hash 16415, now seen corresponding path program 1 times [2022-12-13 11:30:55,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:30:55,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782054134] [2022-12-13 11:30:55,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:30:55,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:30:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:30:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:30:55,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:30:55,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782054134] [2022-12-13 11:30:55,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782054134] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:30:55,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:30:55,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:30:55,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980442422] [2022-12-13 11:30:55,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:30:55,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:30:55,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:30:55,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:30:55,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:30:56,012 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 255 [2022-12-13 11:30:56,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:56,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:30:56,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 255 [2022-12-13 11:30:56,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:30:56,111 INFO L130 PetriNetUnfolder]: 180/434 cut-off events. [2022-12-13 11:30:56,111 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-12-13 11:30:56,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 434 events. 180/434 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2171 event pairs, 156 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 863. Up to 344 conditions per place. [2022-12-13 11:30:56,113 INFO L137 encePairwiseOnDemand]: 250/255 looper letters, 40 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2022-12-13 11:30:56,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 202 flow [2022-12-13 11:30:56,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:30:56,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:30:56,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 384 transitions. [2022-12-13 11:30:56,116 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5019607843137255 [2022-12-13 11:30:56,116 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 384 transitions. [2022-12-13 11:30:56,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 384 transitions. [2022-12-13 11:30:56,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:30:56,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 384 transitions. [2022-12-13 11:30:56,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:56,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:56,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:56,120 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 96 flow. Second operand 3 states and 384 transitions. [2022-12-13 11:30:56,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 202 flow [2022-12-13 11:30:56,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:30:56,121 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 94 flow [2022-12-13 11:30:56,121 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2022-12-13 11:30:56,122 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -2 predicate places. [2022-12-13 11:30:56,122 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 94 flow [2022-12-13 11:30:56,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:56,122 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:30:56,122 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:30:56,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 11:30:56,123 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-13 11:30:56,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:30:56,123 INFO L85 PathProgramCache]: Analyzing trace with hash 489323669, now seen corresponding path program 1 times [2022-12-13 11:30:56,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:30:56,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590358057] [2022-12-13 11:30:56,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:30:56,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:30:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:30:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:30:56,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:30:56,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590358057] [2022-12-13 11:30:56,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590358057] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:30:56,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292050182] [2022-12-13 11:30:56,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:30:56,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:30:56,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:30:56,205 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:30:56,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:30:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:30:56,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:30:56,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:30:56,320 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 [2022-12-13 11:30:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:30:56,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:30:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:30:56,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292050182] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:30:56,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:30:56,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 11:30:56,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79555170] [2022-12-13 11:30:56,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:30:56,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:30:56,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:30:56,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:30:56,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:30:56,561 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 255 [2022-12-13 11:30:56,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 94 flow. Second operand has 8 states, 8 states have (on average 113.875) internal successors, (911), 8 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:56,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:30:56,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 255 [2022-12-13 11:30:56,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:30:56,641 INFO L130 PetriNetUnfolder]: 24/79 cut-off events. [2022-12-13 11:30:56,641 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-13 11:30:56,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 79 events. 24/79 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 208 event pairs, 11 based on Foata normal form. 13/85 useless extension candidates. Maximal degree in co-relation 161. Up to 50 conditions per place. [2022-12-13 11:30:56,642 INFO L137 encePairwiseOnDemand]: 251/255 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2022-12-13 11:30:56,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 137 flow [2022-12-13 11:30:56,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:30:56,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:30:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 479 transitions. [2022-12-13 11:30:56,645 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4696078431372549 [2022-12-13 11:30:56,645 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 479 transitions. [2022-12-13 11:30:56,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 479 transitions. [2022-12-13 11:30:56,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:30:56,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 479 transitions. [2022-12-13 11:30:56,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:56,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:56,650 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:56,651 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 94 flow. Second operand 4 states and 479 transitions. [2022-12-13 11:30:56,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 137 flow [2022-12-13 11:30:56,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:30:56,652 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 54 flow [2022-12-13 11:30:56,652 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, 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=54, PETRI_PLACES=29, PETRI_TRANSITIONS=22} [2022-12-13 11:30:56,653 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -15 predicate places. [2022-12-13 11:30:56,653 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 54 flow [2022-12-13 11:30:56,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 113.875) internal successors, (911), 8 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:56,654 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:30:56,654 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:30:56,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:30:56,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:30:56,855 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-13 11:30:56,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:30:56,855 INFO L85 PathProgramCache]: Analyzing trace with hash -2010855158, now seen corresponding path program 1 times [2022-12-13 11:30:56,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:30:56,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447240725] [2022-12-13 11:30:56,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:30:56,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:30:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:30:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:30:56,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:30:56,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447240725] [2022-12-13 11:30:56,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447240725] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:30:56,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:30:56,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:30:56,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10111902] [2022-12-13 11:30:56,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:30:56,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:30:56,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:30:56,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:30:56,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:30:57,039 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 255 [2022-12-13 11:30:57,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 113.25) internal successors, (453), 4 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:57,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:30:57,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 255 [2022-12-13 11:30:57,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:30:57,062 INFO L130 PetriNetUnfolder]: 20/68 cut-off events. [2022-12-13 11:30:57,062 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-13 11:30:57,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 68 events. 20/68 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 160 event pairs, 20 based on Foata normal form. 2/65 useless extension candidates. Maximal degree in co-relation 138. Up to 55 conditions per place. [2022-12-13 11:30:57,063 INFO L137 encePairwiseOnDemand]: 252/255 looper letters, 13 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2022-12-13 11:30:57,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 20 transitions, 78 flow [2022-12-13 11:30:57,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:30:57,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:30:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2022-12-13 11:30:57,065 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46013071895424834 [2022-12-13 11:30:57,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2022-12-13 11:30:57,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2022-12-13 11:30:57,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:30:57,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2022-12-13 11:30:57,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:57,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:57,069 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:57,069 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 54 flow. Second operand 3 states and 352 transitions. [2022-12-13 11:30:57,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 20 transitions, 78 flow [2022-12-13 11:30:57,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 20 transitions, 75 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:30:57,070 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 49 flow [2022-12-13 11:30:57,070 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=49, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2022-12-13 11:30:57,071 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -17 predicate places. [2022-12-13 11:30:57,071 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 49 flow [2022-12-13 11:30:57,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.25) internal successors, (453), 4 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:57,072 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:30:57,072 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 11:30:57,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 11:30:57,072 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-13 11:30:57,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:30:57,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2010835114, now seen corresponding path program 1 times [2022-12-13 11:30:57,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:30:57,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874296880] [2022-12-13 11:30:57,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:30:57,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:30:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:30:57,086 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 11:30:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:30:57,109 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 11:30:57,109 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 11:30:57,110 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2022-12-13 11:30:57,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2022-12-13 11:30:57,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2022-12-13 11:30:57,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2022-12-13 11:30:57,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2022-12-13 11:30:57,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2022-12-13 11:30:57,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2022-12-13 11:30:57,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (17 of 25 remaining) [2022-12-13 11:30:57,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 25 remaining) [2022-12-13 11:30:57,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2022-12-13 11:30:57,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2022-12-13 11:30:57,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2022-12-13 11:30:57,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2022-12-13 11:30:57,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2022-12-13 11:30:57,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2022-12-13 11:30:57,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2022-12-13 11:30:57,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2022-12-13 11:30:57,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2022-12-13 11:30:57,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2022-12-13 11:30:57,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2022-12-13 11:30:57,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2022-12-13 11:30:57,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2022-12-13 11:30:57,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2022-12-13 11:30:57,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2022-12-13 11:30:57,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2022-12-13 11:30:57,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 11:30:57,116 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-12-13 11:30:57,119 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 11:30:57,119 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 11:30:57,140 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 11:30:57,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 177 transitions, 372 flow [2022-12-13 11:30:57,178 INFO L130 PetriNetUnfolder]: 31/301 cut-off events. [2022-12-13 11:30:57,178 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 11:30:57,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 301 events. 31/301 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1064 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2022-12-13 11:30:57,179 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 177 transitions, 372 flow [2022-12-13 11:30:57,182 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 177 transitions, 372 flow [2022-12-13 11:30:57,182 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:30:57,183 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 177 transitions, 372 flow [2022-12-13 11:30:57,183 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 177 transitions, 372 flow [2022-12-13 11:30:57,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 177 transitions, 372 flow [2022-12-13 11:30:57,218 INFO L130 PetriNetUnfolder]: 31/301 cut-off events. [2022-12-13 11:30:57,218 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 11:30:57,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 301 events. 31/301 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1064 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2022-12-13 11:30:57,227 INFO L119 LiptonReduction]: Number of co-enabled transitions 12560 [2022-12-13 11:31:00,059 INFO L134 LiptonReduction]: Checked pairs total: 30813 [2022-12-13 11:31:00,059 INFO L136 LiptonReduction]: Total number of compositions: 154 [2022-12-13 11:31:00,060 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:31:00,061 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;@163e3363, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:31:00,061 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2022-12-13 11:31:00,062 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 11:31:00,062 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:31:00,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:00,062 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:31:00,062 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 11:31:00,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:00,063 INFO L85 PathProgramCache]: Analyzing trace with hash 28346, now seen corresponding path program 1 times [2022-12-13 11:31:00,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:00,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670120305] [2022-12-13 11:31:00,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:00,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:00,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:00,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670120305] [2022-12-13 11:31:00,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670120305] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:31:00,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:31:00,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:31:00,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544476728] [2022-12-13 11:31:00,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:31:00,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:31:00,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:00,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:31:00,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:31:00,117 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 331 [2022-12-13 11:31:00,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 80 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:00,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:00,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 331 [2022-12-13 11:31:00,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:00,889 INFO L130 PetriNetUnfolder]: 5944/10008 cut-off events. [2022-12-13 11:31:00,889 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-12-13 11:31:00,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19516 conditions, 10008 events. 5944/10008 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 72189 event pairs, 5148 based on Foata normal form. 471/6709 useless extension candidates. Maximal degree in co-relation 11685. Up to 8188 conditions per place. [2022-12-13 11:31:00,931 INFO L137 encePairwiseOnDemand]: 307/331 looper letters, 70 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2022-12-13 11:31:00,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 332 flow [2022-12-13 11:31:00,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:31:00,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:31:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 551 transitions. [2022-12-13 11:31:00,934 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5548841893252769 [2022-12-13 11:31:00,934 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 551 transitions. [2022-12-13 11:31:00,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 551 transitions. [2022-12-13 11:31:00,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:00,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 551 transitions. [2022-12-13 11:31:00,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:00,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:00,938 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:00,938 INFO L175 Difference]: Start difference. First operand has 68 places, 80 transitions, 178 flow. Second operand 3 states and 551 transitions. [2022-12-13 11:31:00,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 332 flow [2022-12-13 11:31:00,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 84 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 11:31:00,940 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 140 flow [2022-12-13 11:31:00,941 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2022-12-13 11:31:00,941 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2022-12-13 11:31:00,941 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 140 flow [2022-12-13 11:31:00,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:00,942 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:00,942 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:31:00,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 11:31:00,942 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 11:31:00,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:00,942 INFO L85 PathProgramCache]: Analyzing trace with hash 28347, now seen corresponding path program 1 times [2022-12-13 11:31:00,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:00,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430939608] [2022-12-13 11:31:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:00,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:00,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:00,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430939608] [2022-12-13 11:31:00,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430939608] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:31:00,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:31:00,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:31:00,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207572456] [2022-12-13 11:31:00,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:31:00,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:31:00,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:00,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:31:00,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:31:01,043 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 331 [2022-12-13 11:31:01,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:01,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:01,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 331 [2022-12-13 11:31:01,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:01,731 INFO L130 PetriNetUnfolder]: 5943/10115 cut-off events. [2022-12-13 11:31:01,731 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2022-12-13 11:31:01,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20082 conditions, 10115 events. 5943/10115 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 73677 event pairs, 2808 based on Foata normal form. 0/6562 useless extension candidates. Maximal degree in co-relation 17136. Up to 9394 conditions per place. [2022-12-13 11:31:01,765 INFO L137 encePairwiseOnDemand]: 327/331 looper letters, 60 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2022-12-13 11:31:01,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 294 flow [2022-12-13 11:31:01,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:31:01,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:31:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2022-12-13 11:31:01,767 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5176233635448136 [2022-12-13 11:31:01,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2022-12-13 11:31:01,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2022-12-13 11:31:01,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:01,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2022-12-13 11:31:01,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:01,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:01,769 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:01,769 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 140 flow. Second operand 3 states and 514 transitions. [2022-12-13 11:31:01,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 294 flow [2022-12-13 11:31:01,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:31:01,779 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 148 flow [2022-12-13 11:31:01,779 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2022-12-13 11:31:01,780 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, -4 predicate places. [2022-12-13 11:31:01,780 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 148 flow [2022-12-13 11:31:01,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:01,780 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:01,780 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:31:01,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 11:31:01,780 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 11:31:01,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:01,780 INFO L85 PathProgramCache]: Analyzing trace with hash 431624831, now seen corresponding path program 1 times [2022-12-13 11:31:01,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:01,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139592434] [2022-12-13 11:31:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:01,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:01,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:01,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139592434] [2022-12-13 11:31:01,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139592434] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:31:01,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925098798] [2022-12-13 11:31:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:01,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:31:01,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:31:01,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:31:01,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:31:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:01,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:31:01,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:31:01,893 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 [2022-12-13 11:31:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:01,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:31:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:01,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925098798] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:31:01,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:31:01,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 11:31:01,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583648669] [2022-12-13 11:31:01,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:31:01,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:31:01,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:01,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:31:01,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:31:02,165 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 331 [2022-12-13 11:31:02,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 148 flow. Second operand has 8 states, 8 states have (on average 147.875) internal successors, (1183), 8 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:02,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:02,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 331 [2022-12-13 11:31:02,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:02,365 INFO L130 PetriNetUnfolder]: 936/1839 cut-off events. [2022-12-13 11:31:02,366 INFO L131 PetriNetUnfolder]: For 420/420 co-relation queries the response was YES. [2022-12-13 11:31:02,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4074 conditions, 1839 events. 936/1839 cut-off events. For 420/420 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11943 event pairs, 0 based on Foata normal form. 210/1686 useless extension candidates. Maximal degree in co-relation 467. Up to 1120 conditions per place. [2022-12-13 11:31:02,371 INFO L137 encePairwiseOnDemand]: 327/331 looper letters, 70 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2022-12-13 11:31:02,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 83 transitions, 332 flow [2022-12-13 11:31:02,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:31:02,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:31:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 807 transitions. [2022-12-13 11:31:02,373 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48761329305135953 [2022-12-13 11:31:02,373 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 807 transitions. [2022-12-13 11:31:02,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 807 transitions. [2022-12-13 11:31:02,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:02,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 807 transitions. [2022-12-13 11:31:02,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 161.4) internal successors, (807), 5 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:02,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 331.0) internal successors, (1986), 6 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:02,376 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 331.0) internal successors, (1986), 6 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:02,376 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 148 flow. Second operand 5 states and 807 transitions. [2022-12-13 11:31:02,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 83 transitions, 332 flow [2022-12-13 11:31:02,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 83 transitions, 328 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 11:31:02,380 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 106 flow [2022-12-13 11:31:02,380 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2022-12-13 11:31:02,381 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, -16 predicate places. [2022-12-13 11:31:02,381 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 106 flow [2022-12-13 11:31:02,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 147.875) internal successors, (1183), 8 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:02,381 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:02,382 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:31:02,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 11:31:02,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 11:31:02,583 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 11:31:02,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:02,585 INFO L85 PathProgramCache]: Analyzing trace with hash 431822726, now seen corresponding path program 1 times [2022-12-13 11:31:02,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:02,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649599255] [2022-12-13 11:31:02,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:02,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:02,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:02,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649599255] [2022-12-13 11:31:02,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649599255] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:31:02,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:31:02,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:31:02,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888856914] [2022-12-13 11:31:02,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:31:02,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:31:02,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:02,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:31:02,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:31:02,766 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 331 [2022-12-13 11:31:02,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:02,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:02,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 331 [2022-12-13 11:31:02,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:02,860 INFO L130 PetriNetUnfolder]: 682/1265 cut-off events. [2022-12-13 11:31:02,860 INFO L131 PetriNetUnfolder]: For 502/502 co-relation queries the response was YES. [2022-12-13 11:31:02,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2780 conditions, 1265 events. 682/1265 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7078 event pairs, 682 based on Foata normal form. 75/1090 useless extension candidates. Maximal degree in co-relation 1653. Up to 1152 conditions per place. [2022-12-13 11:31:02,866 INFO L137 encePairwiseOnDemand]: 326/331 looper letters, 27 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2022-12-13 11:31:02,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 38 transitions, 154 flow [2022-12-13 11:31:02,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:31:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:31:02,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2022-12-13 11:31:02,868 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4602215508559919 [2022-12-13 11:31:02,868 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2022-12-13 11:31:02,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2022-12-13 11:31:02,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:02,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2022-12-13 11:31:02,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:02,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:02,871 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:02,871 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 106 flow. Second operand 3 states and 457 transitions. [2022-12-13 11:31:02,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 38 transitions, 154 flow [2022-12-13 11:31:02,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 38 transitions, 147 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-13 11:31:02,873 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 93 flow [2022-12-13 11:31:02,873 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2022-12-13 11:31:02,874 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, -21 predicate places. [2022-12-13 11:31:02,874 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 93 flow [2022-12-13 11:31:02,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:02,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:02,874 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:31:02,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 11:31:02,875 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 11:31:02,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:02,875 INFO L85 PathProgramCache]: Analyzing trace with hash 501601115, now seen corresponding path program 1 times [2022-12-13 11:31:02,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:02,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145682484] [2022-12-13 11:31:02,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:02,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:02,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:02,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:02,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145682484] [2022-12-13 11:31:02,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145682484] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:31:02,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:31:02,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:31:02,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919642844] [2022-12-13 11:31:02,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:31:02,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:31:02,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:02,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:31:02,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:31:03,019 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 331 [2022-12-13 11:31:03,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 131.5) internal successors, (526), 4 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:03,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:03,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 331 [2022-12-13 11:31:03,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:03,146 INFO L130 PetriNetUnfolder]: 468/858 cut-off events. [2022-12-13 11:31:03,146 INFO L131 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2022-12-13 11:31:03,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1810 conditions, 858 events. 468/858 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3950 event pairs, 468 based on Foata normal form. 0/852 useless extension candidates. Maximal degree in co-relation 1801. Up to 800 conditions per place. [2022-12-13 11:31:03,149 INFO L137 encePairwiseOnDemand]: 322/331 looper letters, 23 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2022-12-13 11:31:03,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 125 flow [2022-12-13 11:31:03,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:31:03,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:31:03,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2022-12-13 11:31:03,151 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42396777442094663 [2022-12-13 11:31:03,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2022-12-13 11:31:03,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2022-12-13 11:31:03,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:03,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2022-12-13 11:31:03,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:03,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:03,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:03,154 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 93 flow. Second operand 3 states and 421 transitions. [2022-12-13 11:31:03,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 125 flow [2022-12-13 11:31:03,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:31:03,155 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 78 flow [2022-12-13 11:31:03,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2022-12-13 11:31:03,155 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, -28 predicate places. [2022-12-13 11:31:03,155 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 78 flow [2022-12-13 11:31:03,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.5) internal successors, (526), 4 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:03,156 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:03,156 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 11:31:03,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 11:31:03,156 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 11:31:03,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:03,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1545572744, now seen corresponding path program 1 times [2022-12-13 11:31:03,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:03,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132887727] [2022-12-13 11:31:03,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:03,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:03,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:31:03,167 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 11:31:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:31:03,177 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 11:31:03,177 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 11:31:03,178 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2022-12-13 11:31:03,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2022-12-13 11:31:03,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2022-12-13 11:31:03,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2022-12-13 11:31:03,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2022-12-13 11:31:03,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2022-12-13 11:31:03,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2022-12-13 11:31:03,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (25 of 33 remaining) [2022-12-13 11:31:03,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 33 remaining) [2022-12-13 11:31:03,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2022-12-13 11:31:03,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2022-12-13 11:31:03,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2022-12-13 11:31:03,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2022-12-13 11:31:03,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2022-12-13 11:31:03,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2022-12-13 11:31:03,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2022-12-13 11:31:03,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2022-12-13 11:31:03,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2022-12-13 11:31:03,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2022-12-13 11:31:03,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2022-12-13 11:31:03,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2022-12-13 11:31:03,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2022-12-13 11:31:03,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2022-12-13 11:31:03,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2022-12-13 11:31:03,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2022-12-13 11:31:03,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2022-12-13 11:31:03,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2022-12-13 11:31:03,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2022-12-13 11:31:03,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2022-12-13 11:31:03,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2022-12-13 11:31:03,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2022-12-13 11:31:03,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2022-12-13 11:31:03,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 33 remaining) [2022-12-13 11:31:03,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 11:31:03,182 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-12-13 11:31:03,182 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 11:31:03,182 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 11:31:03,206 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 11:31:03,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 219 transitions, 468 flow [2022-12-13 11:31:03,273 INFO L130 PetriNetUnfolder]: 50/463 cut-off events. [2022-12-13 11:31:03,273 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 11:31:03,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 463 events. 50/463 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1816 event pairs, 1 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 309. Up to 16 conditions per place. [2022-12-13 11:31:03,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 219 transitions, 468 flow [2022-12-13 11:31:03,281 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 219 transitions, 468 flow [2022-12-13 11:31:03,281 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:31:03,281 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 219 transitions, 468 flow [2022-12-13 11:31:03,282 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 219 transitions, 468 flow [2022-12-13 11:31:03,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 219 transitions, 468 flow [2022-12-13 11:31:03,336 INFO L130 PetriNetUnfolder]: 50/463 cut-off events. [2022-12-13 11:31:03,337 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 11:31:03,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 463 events. 50/463 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1816 event pairs, 1 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 309. Up to 16 conditions per place. [2022-12-13 11:31:03,351 INFO L119 LiptonReduction]: Number of co-enabled transitions 24000 [2022-12-13 11:31:06,195 INFO L134 LiptonReduction]: Checked pairs total: 71892 [2022-12-13 11:31:06,195 INFO L136 LiptonReduction]: Total number of compositions: 177 [2022-12-13 11:31:06,196 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:31:06,196 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;@163e3363, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:31:06,196 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-12-13 11:31:06,197 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 11:31:06,197 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:31:06,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:06,197 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:31:06,197 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 11:31:06,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:06,198 INFO L85 PathProgramCache]: Analyzing trace with hash 42387, now seen corresponding path program 1 times [2022-12-13 11:31:06,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:06,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646793400] [2022-12-13 11:31:06,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:06,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:06,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:06,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646793400] [2022-12-13 11:31:06,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646793400] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:31:06,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:31:06,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:31:06,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97014672] [2022-12-13 11:31:06,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:31:06,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:31:06,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:06,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:31:06,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:31:06,295 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 396 [2022-12-13 11:31:06,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:06,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:06,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 396 [2022-12-13 11:31:06,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:19,359 INFO L130 PetriNetUnfolder]: 127404/190916 cut-off events. [2022-12-13 11:31:19,359 INFO L131 PetriNetUnfolder]: For 2290/2290 co-relation queries the response was YES. [2022-12-13 11:31:19,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368884 conditions, 190916 events. 127404/190916 cut-off events. For 2290/2290 co-relation queries the response was YES. Maximal size of possible extension queue 5996. Compared 1649414 event pairs, 83005 based on Foata normal form. 10511/132428 useless extension candidates. Maximal degree in co-relation 25856. Up to 176349 conditions per place. [2022-12-13 11:31:20,343 INFO L137 encePairwiseOnDemand]: 366/396 looper letters, 76 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2022-12-13 11:31:20,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 95 transitions, 376 flow [2022-12-13 11:31:20,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:31:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:31:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 666 transitions. [2022-12-13 11:31:20,346 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2022-12-13 11:31:20,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 666 transitions. [2022-12-13 11:31:20,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 666 transitions. [2022-12-13 11:31:20,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:20,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 666 transitions. [2022-12-13 11:31:20,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:20,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:20,350 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:20,350 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 240 flow. Second operand 3 states and 666 transitions. [2022-12-13 11:31:20,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 95 transitions, 376 flow [2022-12-13 11:31:20,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 95 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 11:31:20,353 INFO L231 Difference]: Finished difference. Result has 86 places, 80 transitions, 202 flow [2022-12-13 11:31:20,354 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=86, PETRI_TRANSITIONS=80} [2022-12-13 11:31:20,354 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -3 predicate places. [2022-12-13 11:31:20,354 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 80 transitions, 202 flow [2022-12-13 11:31:20,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:20,355 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:20,355 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:31:20,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 11:31:20,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 11:31:20,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:20,356 INFO L85 PathProgramCache]: Analyzing trace with hash 42386, now seen corresponding path program 1 times [2022-12-13 11:31:20,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:20,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285223515] [2022-12-13 11:31:20,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:20,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:20,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:20,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285223515] [2022-12-13 11:31:20,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285223515] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:31:20,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:31:20,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:31:20,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472167907] [2022-12-13 11:31:20,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:31:20,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:31:20,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:20,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:31:20,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:31:20,438 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 396 [2022-12-13 11:31:20,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 80 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:20,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:20,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 396 [2022-12-13 11:31:20,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:31,491 INFO L130 PetriNetUnfolder]: 112901/166586 cut-off events. [2022-12-13 11:31:31,491 INFO L131 PetriNetUnfolder]: For 7221/7221 co-relation queries the response was YES. [2022-12-13 11:31:31,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332191 conditions, 166586 events. 112901/166586 cut-off events. For 7221/7221 co-relation queries the response was YES. Maximal size of possible extension queue 5209. Compared 1395566 event pairs, 97500 based on Foata normal form. 0/110833 useless extension candidates. Maximal degree in co-relation 332088. Up to 135303 conditions per place. [2022-12-13 11:31:32,220 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 95 selfloop transitions, 3 changer transitions 0/115 dead transitions. [2022-12-13 11:31:32,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 115 transitions, 468 flow [2022-12-13 11:31:32,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:31:32,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:31:32,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 642 transitions. [2022-12-13 11:31:32,223 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5404040404040404 [2022-12-13 11:31:32,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 642 transitions. [2022-12-13 11:31:32,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 642 transitions. [2022-12-13 11:31:32,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:32,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 642 transitions. [2022-12-13 11:31:32,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:32,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:32,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:32,227 INFO L175 Difference]: Start difference. First operand has 86 places, 80 transitions, 202 flow. Second operand 3 states and 642 transitions. [2022-12-13 11:31:32,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 115 transitions, 468 flow [2022-12-13 11:31:32,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 115 transitions, 466 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:31:32,232 INFO L231 Difference]: Finished difference. Result has 85 places, 78 transitions, 202 flow [2022-12-13 11:31:32,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=85, PETRI_TRANSITIONS=78} [2022-12-13 11:31:32,232 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -4 predicate places. [2022-12-13 11:31:32,232 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 78 transitions, 202 flow [2022-12-13 11:31:32,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:32,233 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:32,233 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:31:32,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 11:31:32,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 11:31:32,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:32,234 INFO L85 PathProgramCache]: Analyzing trace with hash 523131876, now seen corresponding path program 1 times [2022-12-13 11:31:32,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:32,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771360047] [2022-12-13 11:31:32,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:32,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:32,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:32,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771360047] [2022-12-13 11:31:32,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771360047] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:31:32,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:31:32,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:31:32,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901443147] [2022-12-13 11:31:32,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:31:32,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:31:32,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:32,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:31:32,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:31:32,393 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 396 [2022-12-13 11:31:32,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 78 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:32,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:32,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 396 [2022-12-13 11:31:32,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:39,266 INFO L130 PetriNetUnfolder]: 69435/103975 cut-off events. [2022-12-13 11:31:39,266 INFO L131 PetriNetUnfolder]: For 6253/6253 co-relation queries the response was YES. [2022-12-13 11:31:39,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210407 conditions, 103975 events. 69435/103975 cut-off events. For 6253/6253 co-relation queries the response was YES. Maximal size of possible extension queue 3192. Compared 842108 event pairs, 59858 based on Foata normal form. 4578/80682 useless extension candidates. Maximal degree in co-relation 180348. Up to 83621 conditions per place. [2022-12-13 11:31:39,852 INFO L137 encePairwiseOnDemand]: 387/396 looper letters, 83 selfloop transitions, 3 changer transitions 0/103 dead transitions. [2022-12-13 11:31:39,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 103 transitions, 424 flow [2022-12-13 11:31:39,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:31:39,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:31:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 785 transitions. [2022-12-13 11:31:39,854 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49558080808080807 [2022-12-13 11:31:39,854 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 785 transitions. [2022-12-13 11:31:39,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 785 transitions. [2022-12-13 11:31:39,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:39,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 785 transitions. [2022-12-13 11:31:39,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:39,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:39,858 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:39,858 INFO L175 Difference]: Start difference. First operand has 85 places, 78 transitions, 202 flow. Second operand 4 states and 785 transitions. [2022-12-13 11:31:39,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 103 transitions, 424 flow [2022-12-13 11:31:40,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 103 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:31:40,056 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 190 flow [2022-12-13 11:31:40,056 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2022-12-13 11:31:40,057 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -9 predicate places. [2022-12-13 11:31:40,057 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 190 flow [2022-12-13 11:31:40,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:40,057 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:40,057 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:31:40,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 11:31:40,057 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 11:31:40,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:40,057 INFO L85 PathProgramCache]: Analyzing trace with hash 522862156, now seen corresponding path program 1 times [2022-12-13 11:31:40,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:40,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951062638] [2022-12-13 11:31:40,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:40,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:40,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:40,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951062638] [2022-12-13 11:31:40,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951062638] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:31:40,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266465908] [2022-12-13 11:31:40,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:40,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:31:40,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:31:40,104 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:31:40,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:31:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:40,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:31:40,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:31:40,173 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 [2022-12-13 11:31:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:40,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:31:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:40,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266465908] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:31:40,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:31:40,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 11:31:40,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479777721] [2022-12-13 11:31:40,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:31:40,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 11:31:40,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:40,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 11:31:40,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:31:40,437 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 396 [2022-12-13 11:31:40,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 190 flow. Second operand has 7 states, 7 states have (on average 182.71428571428572) internal successors, (1279), 7 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:40,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:40,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 396 [2022-12-13 11:31:40,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:46,006 INFO L130 PetriNetUnfolder]: 66111/95026 cut-off events. [2022-12-13 11:31:46,006 INFO L131 PetriNetUnfolder]: For 6841/6841 co-relation queries the response was YES. [2022-12-13 11:31:46,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199935 conditions, 95026 events. 66111/95026 cut-off events. For 6841/6841 co-relation queries the response was YES. Maximal size of possible extension queue 2957. Compared 731191 event pairs, 37 based on Foata normal form. 12/72931 useless extension candidates. Maximal degree in co-relation 168940. Up to 69724 conditions per place. [2022-12-13 11:31:46,381 INFO L137 encePairwiseOnDemand]: 390/396 looper letters, 159 selfloop transitions, 8 changer transitions 0/184 dead transitions. [2022-12-13 11:31:46,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 184 transitions, 760 flow [2022-12-13 11:31:46,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:31:46,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:31:46,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1257 transitions. [2022-12-13 11:31:46,385 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5290404040404041 [2022-12-13 11:31:46,385 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1257 transitions. [2022-12-13 11:31:46,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1257 transitions. [2022-12-13 11:31:46,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:46,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1257 transitions. [2022-12-13 11:31:46,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 209.5) internal successors, (1257), 6 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:46,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:46,390 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:46,390 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 190 flow. Second operand 6 states and 1257 transitions. [2022-12-13 11:31:46,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 184 transitions, 760 flow [2022-12-13 11:31:47,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 184 transitions, 754 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:31:47,677 INFO L231 Difference]: Finished difference. Result has 83 places, 74 transitions, 212 flow [2022-12-13 11:31:47,677 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=83, PETRI_TRANSITIONS=74} [2022-12-13 11:31:47,677 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -6 predicate places. [2022-12-13 11:31:47,677 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 74 transitions, 212 flow [2022-12-13 11:31:47,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 182.71428571428572) internal successors, (1279), 7 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:47,678 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:47,678 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:31:47,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 11:31:47,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:31:47,879 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 11:31:47,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:47,880 INFO L85 PathProgramCache]: Analyzing trace with hash -962781148, now seen corresponding path program 1 times [2022-12-13 11:31:47,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:47,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945557272] [2022-12-13 11:31:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:47,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:47,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:47,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945557272] [2022-12-13 11:31:47,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945557272] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:31:47,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:31:47,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:31:47,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293474100] [2022-12-13 11:31:47,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:31:47,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:31:47,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:47,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:31:47,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:31:48,044 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 396 [2022-12-13 11:31:48,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 74 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:48,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:48,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 396 [2022-12-13 11:31:48,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:54,088 INFO L130 PetriNetUnfolder]: 63172/94517 cut-off events. [2022-12-13 11:31:54,088 INFO L131 PetriNetUnfolder]: For 9557/9557 co-relation queries the response was YES. [2022-12-13 11:31:54,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200441 conditions, 94517 events. 63172/94517 cut-off events. For 9557/9557 co-relation queries the response was YES. Maximal size of possible extension queue 2388. Compared 710725 event pairs, 43882 based on Foata normal form. 0/81999 useless extension candidates. Maximal degree in co-relation 58067. Up to 59662 conditions per place. [2022-12-13 11:31:54,407 INFO L137 encePairwiseOnDemand]: 369/396 looper letters, 105 selfloop transitions, 17 changer transitions 0/130 dead transitions. [2022-12-13 11:31:54,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 130 transitions, 568 flow [2022-12-13 11:31:54,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:31:54,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:31:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 766 transitions. [2022-12-13 11:31:54,409 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48358585858585856 [2022-12-13 11:31:54,410 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 766 transitions. [2022-12-13 11:31:54,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 766 transitions. [2022-12-13 11:31:54,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:54,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 766 transitions. [2022-12-13 11:31:54,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 191.5) internal successors, (766), 4 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:54,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:54,413 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:54,413 INFO L175 Difference]: Start difference. First operand has 83 places, 74 transitions, 212 flow. Second operand 4 states and 766 transitions. [2022-12-13 11:31:54,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 130 transitions, 568 flow [2022-12-13 11:31:54,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 130 transitions, 559 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 11:31:54,420 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 367 flow [2022-12-13 11:31:54,420 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=367, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2022-12-13 11:31:54,421 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -2 predicate places. [2022-12-13 11:31:54,421 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 367 flow [2022-12-13 11:31:54,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:54,421 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:54,421 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 11:31:54,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 11:31:54,421 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 11:31:54,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:54,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1425119286, now seen corresponding path program 1 times [2022-12-13 11:31:54,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:54,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474659012] [2022-12-13 11:31:54,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:54,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:54,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:54,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474659012] [2022-12-13 11:31:54,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474659012] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:31:54,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486700455] [2022-12-13 11:31:54,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:54,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:31:54,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:31:54,467 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:31:54,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:31:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:54,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 11:31:54,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:31:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:54,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:31:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:54,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486700455] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:31:54,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:31:54,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-13 11:31:54,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184010643] [2022-12-13 11:31:54,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:31:54,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 11:31:54,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:54,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 11:31:54,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-12-13 11:31:54,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 396 [2022-12-13 11:31:54,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 367 flow. Second operand has 9 states, 9 states have (on average 186.33333333333334) internal successors, (1677), 9 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:54,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:54,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 396 [2022-12-13 11:31:54,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:55,522 INFO L130 PetriNetUnfolder]: 7986/12688 cut-off events. [2022-12-13 11:31:55,522 INFO L131 PetriNetUnfolder]: For 9524/10094 co-relation queries the response was YES. [2022-12-13 11:31:55,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33245 conditions, 12688 events. 7986/12688 cut-off events. For 9524/10094 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 84578 event pairs, 236 based on Foata normal form. 1156/13513 useless extension candidates. Maximal degree in co-relation 33235. Up to 7914 conditions per place. [2022-12-13 11:31:55,578 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 83 selfloop transitions, 4 changer transitions 0/97 dead transitions. [2022-12-13 11:31:55,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 97 transitions, 470 flow [2022-12-13 11:31:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:31:55,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:31:55,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1193 transitions. [2022-12-13 11:31:55,580 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.502104377104377 [2022-12-13 11:31:55,580 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1193 transitions. [2022-12-13 11:31:55,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1193 transitions. [2022-12-13 11:31:55,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:55,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1193 transitions. [2022-12-13 11:31:55,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 198.83333333333334) internal successors, (1193), 6 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:55,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:55,585 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:55,585 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 367 flow. Second operand 6 states and 1193 transitions. [2022-12-13 11:31:55,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 97 transitions, 470 flow [2022-12-13 11:31:55,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 97 transitions, 456 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-12-13 11:31:55,594 INFO L231 Difference]: Finished difference. Result has 60 places, 43 transitions, 142 flow [2022-12-13 11:31:55,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=60, PETRI_TRANSITIONS=43} [2022-12-13 11:31:55,594 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -29 predicate places. [2022-12-13 11:31:55,594 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 43 transitions, 142 flow [2022-12-13 11:31:55,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 186.33333333333334) internal successors, (1677), 9 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:55,595 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:55,595 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 11:31:55,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 11:31:55,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d86097f7-a60e-4bdf-a091-27d0ef3dc769/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 11:31:55,796 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 11:31:55,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:55,798 INFO L85 PathProgramCache]: Analyzing trace with hash -327661665, now seen corresponding path program 1 times [2022-12-13 11:31:55,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:55,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143457809] [2022-12-13 11:31:55,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:55,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:31:55,828 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 11:31:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:31:55,840 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 11:31:55,840 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 11:31:55,841 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (40 of 41 remaining) [2022-12-13 11:31:55,841 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 41 remaining) [2022-12-13 11:31:55,841 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 41 remaining) [2022-12-13 11:31:55,841 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 41 remaining) [2022-12-13 11:31:55,841 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 41 remaining) [2022-12-13 11:31:55,841 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 41 remaining) [2022-12-13 11:31:55,841 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 41 remaining) [2022-12-13 11:31:55,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (33 of 41 remaining) [2022-12-13 11:31:55,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (32 of 41 remaining) [2022-12-13 11:31:55,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 41 remaining) [2022-12-13 11:31:55,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 41 remaining) [2022-12-13 11:31:55,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 41 remaining) [2022-12-13 11:31:55,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 41 remaining) [2022-12-13 11:31:55,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 41 remaining) [2022-12-13 11:31:55,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 41 remaining) [2022-12-13 11:31:55,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 41 remaining) [2022-12-13 11:31:55,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 41 remaining) [2022-12-13 11:31:55,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 41 remaining) [2022-12-13 11:31:55,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 41 remaining) [2022-12-13 11:31:55,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 41 remaining) [2022-12-13 11:31:55,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 41 remaining) [2022-12-13 11:31:55,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 41 remaining) [2022-12-13 11:31:55,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 41 remaining) [2022-12-13 11:31:55,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 41 remaining) [2022-12-13 11:31:55,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 41 remaining) [2022-12-13 11:31:55,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 41 remaining) [2022-12-13 11:31:55,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 41 remaining) [2022-12-13 11:31:55,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 41 remaining) [2022-12-13 11:31:55,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 41 remaining) [2022-12-13 11:31:55,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 41 remaining) [2022-12-13 11:31:55,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 41 remaining) [2022-12-13 11:31:55,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 41 remaining) [2022-12-13 11:31:55,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 41 remaining) [2022-12-13 11:31:55,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 41 remaining) [2022-12-13 11:31:55,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 41 remaining) [2022-12-13 11:31:55,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 41 remaining) [2022-12-13 11:31:55,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 41 remaining) [2022-12-13 11:31:55,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 41 remaining) [2022-12-13 11:31:55,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 41 remaining) [2022-12-13 11:31:55,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 41 remaining) [2022-12-13 11:31:55,846 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 41 remaining) [2022-12-13 11:31:55,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 11:31:55,846 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:31:55,846 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 11:31:55,846 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 11:31:55,870 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 11:31:55,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 566 flow [2022-12-13 11:31:55,987 INFO L130 PetriNetUnfolder]: 81/713 cut-off events. [2022-12-13 11:31:55,987 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 11:31:55,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 713 events. 81/713 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3198 event pairs, 6 based on Foata normal form. 0/527 useless extension candidates. Maximal degree in co-relation 483. Up to 32 conditions per place. [2022-12-13 11:31:55,991 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 261 transitions, 566 flow [2022-12-13 11:31:55,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 261 transitions, 566 flow [2022-12-13 11:31:55,994 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:31:55,995 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 261 transitions, 566 flow [2022-12-13 11:31:55,995 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 261 transitions, 566 flow [2022-12-13 11:31:55,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 566 flow [2022-12-13 11:31:56,060 INFO L130 PetriNetUnfolder]: 81/713 cut-off events. [2022-12-13 11:31:56,060 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 11:31:56,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 713 events. 81/713 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3198 event pairs, 6 based on Foata normal form. 0/527 useless extension candidates. Maximal degree in co-relation 483. Up to 32 conditions per place. [2022-12-13 11:31:56,080 INFO L119 LiptonReduction]: Number of co-enabled transitions 38880 [2022-12-13 11:31:59,309 INFO L134 LiptonReduction]: Checked pairs total: 112580 [2022-12-13 11:31:59,309 INFO L136 LiptonReduction]: Total number of compositions: 215 [2022-12-13 11:31:59,311 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:31:59,311 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;@163e3363, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:31:59,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2022-12-13 11:31:59,312 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2022-12-13 11:31:59,312 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:31:59,312 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:59,312 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:31:59,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2022-12-13 11:31:59,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:59,312 INFO L85 PathProgramCache]: Analyzing trace with hash 58966, now seen corresponding path program 1 times [2022-12-13 11:31:59,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:59,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437969466] [2022-12-13 11:31:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:59,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:59,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:59,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437969466] [2022-12-13 11:31:59,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437969466] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:31:59,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:31:59,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:31:59,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016992404] [2022-12-13 11:31:59,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:31:59,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:31:59,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:59,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:31:59,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:31:59,376 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 476 [2022-12-13 11:31:59,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 132 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:59,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:59,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 476 [2022-12-13 11:31:59,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand