./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f222d5749b9bb10b4d4c09b2c40e45ee19dec77732a8593ce917652e8ca8a43e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:54:41,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:54:41,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:54:41,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:54:41,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:54:41,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:54:41,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:54:41,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:54:41,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:54:41,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:54:41,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:54:41,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:54:41,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:54:41,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:54:41,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:54:41,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:54:41,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:54:41,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:54:41,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:54:41,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:54:41,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:54:41,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:54:41,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:54:41,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:54:41,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:54:42,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:54:42,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:54:42,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:54:42,001 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:54:42,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:54:42,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:54:42,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:54:42,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:54:42,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:54:42,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:54:42,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:54:42,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:54:42,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:54:42,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:54:42,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:54:42,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:54:42,010 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:54:42,036 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:54:42,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:54:42,037 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:54:42,037 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:54:42,038 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:54:42,038 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:54:42,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:54:42,039 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:54:42,039 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:54:42,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:54:42,040 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:54:42,040 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:54:42,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:54:42,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:54:42,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:54:42,041 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:54:42,041 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:54:42,041 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:54:42,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:54:42,042 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:54:42,042 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:54:42,042 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:54:42,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:54:42,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:54:42,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:54:42,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:54:42,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:54:42,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:54:42,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:54:42,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:54:42,044 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:54:42,045 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:54:42,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:54:42,045 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_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f222d5749b9bb10b4d4c09b2c40e45ee19dec77732a8593ce917652e8ca8a43e [2022-11-25 17:54:42,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:54:42,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:54:42,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:54:42,320 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:54:42,321 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:54:42,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2022-11-25 17:54:45,418 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:54:45,660 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:54:45,660 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2022-11-25 17:54:45,685 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/data/71e78e45d/52d94bfe55b0427faea2bf977b4b94b4/FLAG9d5f6444f [2022-11-25 17:54:45,703 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/data/71e78e45d/52d94bfe55b0427faea2bf977b4b94b4 [2022-11-25 17:54:45,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:54:45,711 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:54:45,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:54:45,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:54:45,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:54:45,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:54:45" (1/1) ... [2022-11-25 17:54:45,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73ccf802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:45, skipping insertion in model container [2022-11-25 17:54:45,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:54:45" (1/1) ... [2022-11-25 17:54:45,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:54:45,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:54:46,275 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_83b97fbc-6ab9-4900-8524-dfbdec33dcec/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i[30176,30189] [2022-11-25 17:54:46,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:54:46,323 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:54:46,378 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_83b97fbc-6ab9-4900-8524-dfbdec33dcec/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i[30176,30189] [2022-11-25 17:54:46,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:54:46,437 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:54:46,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46 WrapperNode [2022-11-25 17:54:46,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:54:46,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:54:46,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:54:46,440 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:54:46,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2022-11-25 17:54:46,472 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2022-11-25 17:54:46,494 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2022-11-25 17:54:46,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:54:46,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:54:46,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:54:46,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:54:46,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2022-11-25 17:54:46,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2022-11-25 17:54:46,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2022-11-25 17:54:46,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2022-11-25 17:54:46,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2022-11-25 17:54:46,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2022-11-25 17:54:46,554 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2022-11-25 17:54:46,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2022-11-25 17:54:46,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:54:46,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:54:46,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:54:46,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:54:46,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (1/1) ... [2022-11-25 17:54:46,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:54:46,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:54:46,614 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:54:46,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:54:46,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:54:46,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:54:46,668 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 17:54:46,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:54:46,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:54:46,669 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 17:54:46,671 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 17:54:46,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:54:46,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:54:46,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:54:46,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:54:46,681 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:54:46,869 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:54:46,871 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:54:47,217 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:54:47,225 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:54:47,226 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-25 17:54:47,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:54:47 BoogieIcfgContainer [2022-11-25 17:54:47,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:54:47,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:54:47,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:54:47,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:54:47,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:54:45" (1/3) ... [2022-11-25 17:54:47,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3862c218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:54:47, skipping insertion in model container [2022-11-25 17:54:47,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:54:46" (2/3) ... [2022-11-25 17:54:47,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3862c218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:54:47, skipping insertion in model container [2022-11-25 17:54:47,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:54:47" (3/3) ... [2022-11-25 17:54:47,248 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_51-mutexptr_racefree.i [2022-11-25 17:54:47,271 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:54:47,272 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-25 17:54:47,272 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:54:47,391 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-25 17:54:47,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 147 transitions, 302 flow [2022-11-25 17:54:47,528 INFO L130 PetriNetUnfolder]: 17/195 cut-off events. [2022-11-25 17:54:47,529 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:54:47,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 195 events. 17/195 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 562 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 96. Up to 4 conditions per place. [2022-11-25 17:54:47,535 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 147 transitions, 302 flow [2022-11-25 17:54:47,541 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 147 transitions, 302 flow [2022-11-25 17:54:47,545 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:54:47,560 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 147 transitions, 302 flow [2022-11-25 17:54:47,563 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 147 transitions, 302 flow [2022-11-25 17:54:47,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 147 transitions, 302 flow [2022-11-25 17:54:47,648 INFO L130 PetriNetUnfolder]: 17/195 cut-off events. [2022-11-25 17:54:47,648 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:54:47,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 195 events. 17/195 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 562 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 96. Up to 4 conditions per place. [2022-11-25 17:54:47,653 INFO L119 LiptonReduction]: Number of co-enabled transitions 4644 [2022-11-25 17:54:53,278 INFO L134 LiptonReduction]: Checked pairs total: 9198 [2022-11-25 17:54:53,279 INFO L136 LiptonReduction]: Total number of compositions: 144 [2022-11-25 17:54:53,296 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:54:53,303 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;@562c1134, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:54:53,303 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-11-25 17:54:53,306 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2022-11-25 17:54:53,306 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:54:53,307 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:53,307 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:54:53,308 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-25 17:54:53,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:53,312 INFO L85 PathProgramCache]: Analyzing trace with hash 18041, now seen corresponding path program 1 times [2022-11-25 17:54:53,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:53,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281795027] [2022-11-25 17:54:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:53,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:53,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:54:53,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281795027] [2022-11-25 17:54:53,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281795027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:54:53,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:54:53,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:54:53,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755699081] [2022-11-25 17:54:53,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:54:53,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:54:53,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:54:53,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:54:53,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:54:53,777 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 291 [2022-11-25 17:54:53,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 49 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:53,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:54:53,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 291 [2022-11-25 17:54:53,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:53,987 INFO L130 PetriNetUnfolder]: 196/458 cut-off events. [2022-11-25 17:54:53,987 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:54:53,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 458 events. 196/458 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2371 event pairs, 169 based on Foata normal form. 16/300 useless extension candidates. Maximal degree in co-relation 853. Up to 380 conditions per place. [2022-11-25 17:54:54,001 INFO L137 encePairwiseOnDemand]: 276/291 looper letters, 42 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2022-11-25 17:54:54,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 198 flow [2022-11-25 17:54:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:54:54,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:54:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2022-11-25 17:54:54,025 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5040091638029782 [2022-11-25 17:54:54,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2022-11-25 17:54:54,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2022-11-25 17:54:54,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:54:54,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2022-11-25 17:54:54,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:54,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:54,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:54,050 INFO L175 Difference]: Start difference. First operand has 43 places, 49 transitions, 106 flow. Second operand 3 states and 440 transitions. [2022-11-25 17:54:54,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 198 flow [2022-11-25 17:54:54,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:54:54,058 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 88 flow [2022-11-25 17:54:54,060 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, 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=88, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2022-11-25 17:54:54,064 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2022-11-25 17:54:54,065 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 88 flow [2022-11-25 17:54:54,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:54,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:54,066 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:54:54,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:54:54,066 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-25 17:54:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:54,069 INFO L85 PathProgramCache]: Analyzing trace with hash 18042, now seen corresponding path program 1 times [2022-11-25 17:54:54,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:54,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008488125] [2022-11-25 17:54:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:54,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:54,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:54,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:54:54,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008488125] [2022-11-25 17:54:54,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008488125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:54:54,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:54:54,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:54:54,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180624884] [2022-11-25 17:54:54,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:54:54,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:54:54,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:54:54,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:54:54,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:54:54,283 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2022-11-25 17:54:54,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:54,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:54:54,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2022-11-25 17:54:54,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:54,415 INFO L130 PetriNetUnfolder]: 195/445 cut-off events. [2022-11-25 17:54:54,415 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:54:54,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 445 events. 195/445 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2605 event pairs, 0 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 868. Up to 412 conditions per place. [2022-11-25 17:54:54,418 INFO L137 encePairwiseOnDemand]: 287/291 looper letters, 44 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2022-11-25 17:54:54,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 51 transitions, 208 flow [2022-11-25 17:54:54,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:54:54,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:54:54,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2022-11-25 17:54:54,421 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4948453608247423 [2022-11-25 17:54:54,421 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2022-11-25 17:54:54,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2022-11-25 17:54:54,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:54:54,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2022-11-25 17:54:54,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:54,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:54,427 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:54,427 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 88 flow. Second operand 3 states and 432 transitions. [2022-11-25 17:54:54,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 51 transitions, 208 flow [2022-11-25 17:54:54,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:54:54,433 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 92 flow [2022-11-25 17:54:54,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2022-11-25 17:54:54,434 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2022-11-25 17:54:54,434 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 92 flow [2022-11-25 17:54:54,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:54,435 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:54,435 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:54:54,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:54:54,436 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)] === [2022-11-25 17:54:54,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:54,439 INFO L85 PathProgramCache]: Analyzing trace with hash 537909923, now seen corresponding path program 1 times [2022-11-25 17:54:54,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:54,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559447057] [2022-11-25 17:54:54,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:54,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:54,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:54:54,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559447057] [2022-11-25 17:54:54,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559447057] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:54:54,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628797535] [2022-11-25 17:54:54,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:54,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:54,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:54:54,655 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:54:54,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:54:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:54,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:54:54,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:54,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:54:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:54,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:54:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:54,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628797535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:54:54,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:54:54,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-25 17:54:54,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932261757] [2022-11-25 17:54:54,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:54:54,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:54:54,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:54:54,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:54:54,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:54:55,305 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 291 [2022-11-25 17:54:55,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 92 flow. Second operand has 8 states, 8 states have (on average 125.875) internal successors, (1007), 8 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:55,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:54:55,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 291 [2022-11-25 17:54:55,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:55,437 INFO L130 PetriNetUnfolder]: 26/81 cut-off events. [2022-11-25 17:54:55,437 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-25 17:54:55,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 81 events. 26/81 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 220 event pairs, 12 based on Foata normal form. 14/85 useless extension candidates. Maximal degree in co-relation 169. Up to 54 conditions per place. [2022-11-25 17:54:55,438 INFO L137 encePairwiseOnDemand]: 287/291 looper letters, 29 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2022-11-25 17:54:55,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 36 transitions, 145 flow [2022-11-25 17:54:55,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:54:55,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:54:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 529 transitions. [2022-11-25 17:54:55,441 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45446735395189003 [2022-11-25 17:54:55,441 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 529 transitions. [2022-11-25 17:54:55,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 529 transitions. [2022-11-25 17:54:55,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:54:55,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 529 transitions. [2022-11-25 17:54:55,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:55,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:55,447 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:55,447 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 92 flow. Second operand 4 states and 529 transitions. [2022-11-25 17:54:55,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 36 transitions, 145 flow [2022-11-25 17:54:55,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 36 transitions, 139 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:54:55,449 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 53 flow [2022-11-25 17:54:55,449 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2022-11-25 17:54:55,450 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, -15 predicate places. [2022-11-25 17:54:55,450 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 53 flow [2022-11-25 17:54:55,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 125.875) internal successors, (1007), 8 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:55,451 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:55,451 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 17:54:55,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:55,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:55,658 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-25 17:54:55,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:55,658 INFO L85 PathProgramCache]: Analyzing trace with hash -504661151, now seen corresponding path program 1 times [2022-11-25 17:54:55,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:55,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870486427] [2022-11-25 17:54:55,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:55,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:54:55,686 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:54:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:54:55,720 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:54:55,720 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:54:55,721 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2022-11-25 17:54:55,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2022-11-25 17:54:55,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2022-11-25 17:54:55,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2022-11-25 17:54:55,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2022-11-25 17:54:55,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2022-11-25 17:54:55,729 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2022-11-25 17:54:55,730 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (17 of 25 remaining) [2022-11-25 17:54:55,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 25 remaining) [2022-11-25 17:54:55,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2022-11-25 17:54:55,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2022-11-25 17:54:55,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2022-11-25 17:54:55,732 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2022-11-25 17:54:55,733 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2022-11-25 17:54:55,733 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2022-11-25 17:54:55,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2022-11-25 17:54:55,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2022-11-25 17:54:55,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2022-11-25 17:54:55,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2022-11-25 17:54:55,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2022-11-25 17:54:55,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2022-11-25 17:54:55,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2022-11-25 17:54:55,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2022-11-25 17:54:55,740 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2022-11-25 17:54:55,740 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2022-11-25 17:54:55,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:54:55,740 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-25 17:54:55,743 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:54:55,743 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 17:54:55,793 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:54:55,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 192 transitions, 402 flow [2022-11-25 17:54:55,873 INFO L130 PetriNetUnfolder]: 31/318 cut-off events. [2022-11-25 17:54:55,873 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 17:54:55,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 318 events. 31/318 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1140 event pairs, 0 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 197. Up to 8 conditions per place. [2022-11-25 17:54:55,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 192 transitions, 402 flow [2022-11-25 17:54:55,882 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 192 transitions, 402 flow [2022-11-25 17:54:55,882 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:54:55,882 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 192 transitions, 402 flow [2022-11-25 17:54:55,883 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 192 transitions, 402 flow [2022-11-25 17:54:55,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 192 transitions, 402 flow [2022-11-25 17:54:55,928 INFO L130 PetriNetUnfolder]: 31/318 cut-off events. [2022-11-25 17:54:55,929 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 17:54:55,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 318 events. 31/318 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1140 event pairs, 0 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 197. Up to 8 conditions per place. [2022-11-25 17:54:55,942 INFO L119 LiptonReduction]: Number of co-enabled transitions 13932 [2022-11-25 17:55:02,144 INFO L134 LiptonReduction]: Checked pairs total: 33952 [2022-11-25 17:55:02,145 INFO L136 LiptonReduction]: Total number of compositions: 179 [2022-11-25 17:55:02,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:55:02,148 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;@562c1134, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:55:02,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2022-11-25 17:55:02,150 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-11-25 17:55:02,151 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:55:02,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:02,151 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:55:02,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-25 17:55:02,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:02,152 INFO L85 PathProgramCache]: Analyzing trace with hash 31331, now seen corresponding path program 1 times [2022-11-25 17:55:02,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:02,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574247467] [2022-11-25 17:55:02,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:02,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:02,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:02,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574247467] [2022-11-25 17:55:02,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574247467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:55:02,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:55:02,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:55:02,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014791029] [2022-11-25 17:55:02,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:55:02,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:55:02,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:02,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:55:02,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:55:02,310 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 371 [2022-11-25 17:55:02,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 78 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:02,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:02,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 371 [2022-11-25 17:55:02,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:03,651 INFO L130 PetriNetUnfolder]: 6218/10663 cut-off events. [2022-11-25 17:55:03,651 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2022-11-25 17:55:03,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20612 conditions, 10663 events. 6218/10663 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 79353 event pairs, 2964 based on Foata normal form. 512/7316 useless extension candidates. Maximal degree in co-relation 2023. Up to 9834 conditions per place. [2022-11-25 17:55:03,728 INFO L137 encePairwiseOnDemand]: 349/371 looper letters, 61 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2022-11-25 17:55:03,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 75 transitions, 294 flow [2022-11-25 17:55:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:55:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:55:03,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 586 transitions. [2022-11-25 17:55:03,730 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5265049415992812 [2022-11-25 17:55:03,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 586 transitions. [2022-11-25 17:55:03,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 586 transitions. [2022-11-25 17:55:03,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:03,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 586 transitions. [2022-11-25 17:55:03,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:03,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:03,736 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:03,737 INFO L175 Difference]: Start difference. First operand has 67 places, 78 transitions, 174 flow. Second operand 3 states and 586 transitions. [2022-11-25 17:55:03,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 75 transitions, 294 flow [2022-11-25 17:55:03,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 75 transitions, 294 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:55:03,742 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 152 flow [2022-11-25 17:55:03,742 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2022-11-25 17:55:03,744 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2022-11-25 17:55:03,745 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 152 flow [2022-11-25 17:55:03,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:03,750 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:03,750 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:55:03,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:55:03,750 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-25 17:55:03,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:03,751 INFO L85 PathProgramCache]: Analyzing trace with hash 31329, now seen corresponding path program 1 times [2022-11-25 17:55:03,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:03,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121427081] [2022-11-25 17:55:03,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:03,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:03,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:03,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121427081] [2022-11-25 17:55:03,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121427081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:55:03,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:55:03,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:55:03,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596534259] [2022-11-25 17:55:03,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:55:03,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:55:03,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:03,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:55:03,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:55:03,885 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 371 [2022-11-25 17:55:03,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:03,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:03,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 371 [2022-11-25 17:55:03,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:05,162 INFO L130 PetriNetUnfolder]: 5507/9372 cut-off events. [2022-11-25 17:55:05,162 INFO L131 PetriNetUnfolder]: For 463/463 co-relation queries the response was YES. [2022-11-25 17:55:05,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18791 conditions, 9372 events. 5507/9372 cut-off events. For 463/463 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 68282 event pairs, 4769 based on Foata normal form. 0/6220 useless extension candidates. Maximal degree in co-relation 18694. Up to 7588 conditions per place. [2022-11-25 17:55:05,215 INFO L137 encePairwiseOnDemand]: 366/371 looper letters, 69 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2022-11-25 17:55:05,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 84 transitions, 342 flow [2022-11-25 17:55:05,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:55:05,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:55:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2022-11-25 17:55:05,218 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5022461814914645 [2022-11-25 17:55:05,218 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2022-11-25 17:55:05,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2022-11-25 17:55:05,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:05,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2022-11-25 17:55:05,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:05,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:05,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:05,225 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 152 flow. Second operand 3 states and 559 transitions. [2022-11-25 17:55:05,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 84 transitions, 342 flow [2022-11-25 17:55:05,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 84 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:55:05,231 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 152 flow [2022-11-25 17:55:05,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2022-11-25 17:55:05,235 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2022-11-25 17:55:05,236 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 152 flow [2022-11-25 17:55:05,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:05,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:05,236 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:55:05,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:55:05,237 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)] === [2022-11-25 17:55:05,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:05,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1107396267, now seen corresponding path program 1 times [2022-11-25 17:55:05,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:05,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426324354] [2022-11-25 17:55:05,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:05,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:05,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:05,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426324354] [2022-11-25 17:55:05,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426324354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:55:05,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543918750] [2022-11-25 17:55:05,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:05,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:05,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:55:05,401 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:55:05,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:55:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:05,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:55:05,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:55:05,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:55:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:05,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:55:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:05,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543918750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:55:05,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:55:05,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-25 17:55:05,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696613079] [2022-11-25 17:55:05,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:55:05,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:55:05,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:05,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:55:05,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:55:05,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 371 [2022-11-25 17:55:05,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 152 flow. Second operand has 8 states, 8 states have (on average 162.875) internal successors, (1303), 8 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:05,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:05,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 371 [2022-11-25 17:55:05,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:06,383 INFO L130 PetriNetUnfolder]: 866/1641 cut-off events. [2022-11-25 17:55:06,383 INFO L131 PetriNetUnfolder]: For 416/416 co-relation queries the response was YES. [2022-11-25 17:55:06,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3468 conditions, 1641 events. 866/1641 cut-off events. For 416/416 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10135 event pairs, 143 based on Foata normal form. 195/1537 useless extension candidates. Maximal degree in co-relation 3458. Up to 1038 conditions per place. [2022-11-25 17:55:06,392 INFO L137 encePairwiseOnDemand]: 367/371 looper letters, 67 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2022-11-25 17:55:06,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 322 flow [2022-11-25 17:55:06,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:55:06,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:55:06,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 879 transitions. [2022-11-25 17:55:06,395 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4738544474393531 [2022-11-25 17:55:06,395 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 879 transitions. [2022-11-25 17:55:06,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 879 transitions. [2022-11-25 17:55:06,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:06,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 879 transitions. [2022-11-25 17:55:06,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 175.8) internal successors, (879), 5 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:06,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 371.0) internal successors, (2226), 6 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:06,402 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 371.0) internal successors, (2226), 6 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:06,402 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 152 flow. Second operand 5 states and 879 transitions. [2022-11-25 17:55:06,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 322 flow [2022-11-25 17:55:06,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 81 transitions, 319 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:55:06,404 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 107 flow [2022-11-25 17:55:06,404 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, 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=107, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2022-11-25 17:55:06,405 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -14 predicate places. [2022-11-25 17:55:06,405 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 107 flow [2022-11-25 17:55:06,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 162.875) internal successors, (1303), 8 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:06,406 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:06,406 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:55:06,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:55:06,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83b97fbc-6ab9-4900-8524-dfbdec33dcec/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 17:55:06,612 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)] === [2022-11-25 17:55:06,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:06,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1107028106, now seen corresponding path program 1 times [2022-11-25 17:55:06,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:06,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051307911] [2022-11-25 17:55:06,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:06,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:06,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:06,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051307911] [2022-11-25 17:55:06,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051307911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:55:06,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:55:06,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:55:06,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280024288] [2022-11-25 17:55:06,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:55:06,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:55:06,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:06,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:55:06,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:55:06,775 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 371 [2022-11-25 17:55:06,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:06,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:06,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 371 [2022-11-25 17:55:06,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:06,927 INFO L130 PetriNetUnfolder]: 622/1196 cut-off events. [2022-11-25 17:55:06,927 INFO L131 PetriNetUnfolder]: For 460/460 co-relation queries the response was YES. [2022-11-25 17:55:06,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2584 conditions, 1196 events. 622/1196 cut-off events. For 460/460 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6783 event pairs, 622 based on Foata normal form. 33/1063 useless extension candidates. Maximal degree in co-relation 2573. Up to 1053 conditions per place. [2022-11-25 17:55:06,935 INFO L137 encePairwiseOnDemand]: 366/371 looper letters, 26 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2022-11-25 17:55:06,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 38 transitions, 153 flow [2022-11-25 17:55:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:55:06,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:55:06,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 507 transitions. [2022-11-25 17:55:06,938 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4555256064690027 [2022-11-25 17:55:06,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 507 transitions. [2022-11-25 17:55:06,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 507 transitions. [2022-11-25 17:55:06,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:06,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 507 transitions. [2022-11-25 17:55:06,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:06,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:06,943 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:06,944 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 107 flow. Second operand 3 states and 507 transitions. [2022-11-25 17:55:06,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 38 transitions, 153 flow [2022-11-25 17:55:06,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 146 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-11-25 17:55:06,946 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 94 flow [2022-11-25 17:55:06,946 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=46, 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=94, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2022-11-25 17:55:06,949 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -19 predicate places. [2022-11-25 17:55:06,949 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 94 flow [2022-11-25 17:55:06,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:06,950 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:06,950 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:55:06,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:55:06,950 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)] === [2022-11-25 17:55:06,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:06,952 INFO L85 PathProgramCache]: Analyzing trace with hash 41866075, now seen corresponding path program 1 times [2022-11-25 17:55:06,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:06,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026955782] [2022-11-25 17:55:06,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:06,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:07,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:07,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026955782] [2022-11-25 17:55:07,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026955782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:55:07,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:55:07,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:55:07,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615751671] [2022-11-25 17:55:07,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:55:07,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:55:07,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:07,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:55:07,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:55:07,191 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 371 [2022-11-25 17:55:07,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 146.5) internal successors, (586), 4 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:07,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:07,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 371 [2022-11-25 17:55:07,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:07,333 INFO L130 PetriNetUnfolder]: 518/917 cut-off events. [2022-11-25 17:55:07,333 INFO L131 PetriNetUnfolder]: For 152/152 co-relation queries the response was YES. [2022-11-25 17:55:07,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1967 conditions, 917 events. 518/917 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4128 event pairs, 518 based on Foata normal form. 0/911 useless extension candidates. Maximal degree in co-relation 1957. Up to 883 conditions per place. [2022-11-25 17:55:07,364 INFO L137 encePairwiseOnDemand]: 362/371 looper letters, 24 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2022-11-25 17:55:07,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 30 transitions, 128 flow [2022-11-25 17:55:07,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:55:07,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:55:07,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2022-11-25 17:55:07,367 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4195867026055705 [2022-11-25 17:55:07,367 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2022-11-25 17:55:07,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2022-11-25 17:55:07,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:07,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2022-11-25 17:55:07,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:07,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:07,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:07,372 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 94 flow. Second operand 3 states and 467 transitions. [2022-11-25 17:55:07,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 30 transitions, 128 flow [2022-11-25 17:55:07,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 30 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:55:07,373 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 79 flow [2022-11-25 17:55:07,373 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=39, 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=79, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2022-11-25 17:55:07,375 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -26 predicate places. [2022-11-25 17:55:07,375 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 79 flow [2022-11-25 17:55:07,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.5) internal successors, (586), 4 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:07,376 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:07,376 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 17:55:07,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:55:07,376 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)] === [2022-11-25 17:55:07,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:07,377 INFO L85 PathProgramCache]: Analyzing trace with hash -2048633861, now seen corresponding path program 1 times [2022-11-25 17:55:07,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:07,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171571709] [2022-11-25 17:55:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:07,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:55:07,394 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:55:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:55:07,411 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:55:07,411 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:55:07,411 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2022-11-25 17:55:07,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2022-11-25 17:55:07,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2022-11-25 17:55:07,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2022-11-25 17:55:07,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2022-11-25 17:55:07,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2022-11-25 17:55:07,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2022-11-25 17:55:07,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (25 of 33 remaining) [2022-11-25 17:55:07,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 33 remaining) [2022-11-25 17:55:07,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2022-11-25 17:55:07,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2022-11-25 17:55:07,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2022-11-25 17:55:07,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2022-11-25 17:55:07,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2022-11-25 17:55:07,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2022-11-25 17:55:07,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2022-11-25 17:55:07,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2022-11-25 17:55:07,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2022-11-25 17:55:07,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2022-11-25 17:55:07,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2022-11-25 17:55:07,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2022-11-25 17:55:07,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2022-11-25 17:55:07,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2022-11-25 17:55:07,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2022-11-25 17:55:07,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2022-11-25 17:55:07,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2022-11-25 17:55:07,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2022-11-25 17:55:07,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2022-11-25 17:55:07,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2022-11-25 17:55:07,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2022-11-25 17:55:07,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2022-11-25 17:55:07,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2022-11-25 17:55:07,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 33 remaining) [2022-11-25 17:55:07,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:55:07,418 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-25 17:55:07,419 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:55:07,419 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 17:55:07,448 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:55:07,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 237 transitions, 504 flow [2022-11-25 17:55:07,519 INFO L130 PetriNetUnfolder]: 50/484 cut-off events. [2022-11-25 17:55:07,519 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 17:55:07,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 484 events. 50/484 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1939 event pairs, 1 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 326. Up to 16 conditions per place. [2022-11-25 17:55:07,523 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 237 transitions, 504 flow [2022-11-25 17:55:07,528 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 237 transitions, 504 flow [2022-11-25 17:55:07,528 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:55:07,528 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 237 transitions, 504 flow [2022-11-25 17:55:07,529 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 237 transitions, 504 flow [2022-11-25 17:55:07,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 237 transitions, 504 flow [2022-11-25 17:55:07,603 INFO L130 PetriNetUnfolder]: 50/484 cut-off events. [2022-11-25 17:55:07,604 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 17:55:07,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 484 events. 50/484 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1939 event pairs, 1 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 326. Up to 16 conditions per place. [2022-11-25 17:55:07,628 INFO L119 LiptonReduction]: Number of co-enabled transitions 26832 [2022-11-25 17:55:14,560 INFO L134 LiptonReduction]: Checked pairs total: 72128 [2022-11-25 17:55:14,561 INFO L136 LiptonReduction]: Total number of compositions: 215 [2022-11-25 17:55:14,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:55:14,564 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;@562c1134, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:55:14,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-11-25 17:55:14,566 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 17:55:14,566 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:55:14,566 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:14,567 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:55:14,567 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)] === [2022-11-25 17:55:14,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:14,567 INFO L85 PathProgramCache]: Analyzing trace with hash 47216, now seen corresponding path program 1 times [2022-11-25 17:55:14,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:14,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305491175] [2022-11-25 17:55:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:14,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:14,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:14,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305491175] [2022-11-25 17:55:14,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305491175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:55:14,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:55:14,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:55:14,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498069683] [2022-11-25 17:55:14,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:55:14,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:55:14,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:14,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:55:14,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:55:14,704 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 452 [2022-11-25 17:55:14,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:14,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:14,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 452 [2022-11-25 17:55:14,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:32,568 INFO L130 PetriNetUnfolder]: 129155/193097 cut-off events. [2022-11-25 17:55:32,568 INFO L131 PetriNetUnfolder]: For 2378/2378 co-relation queries the response was YES. [2022-11-25 17:55:32,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373523 conditions, 193097 events. 129155/193097 cut-off events. For 2378/2378 co-relation queries the response was YES. Maximal size of possible extension queue 6046. Compared 1673330 event pairs, 122473 based on Foata normal form. 10417/146209 useless extension candidates. Maximal degree in co-relation 72006. Up to 178753 conditions per place. [2022-11-25 17:55:33,937 INFO L137 encePairwiseOnDemand]: 422/452 looper letters, 77 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2022-11-25 17:55:33,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 96 transitions, 380 flow [2022-11-25 17:55:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:55:33,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:55:33,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2022-11-25 17:55:33,942 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5317109144542773 [2022-11-25 17:55:33,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2022-11-25 17:55:33,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2022-11-25 17:55:33,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:33,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2022-11-25 17:55:33,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:33,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:33,950 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:33,951 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 240 flow. Second operand 3 states and 721 transitions. [2022-11-25 17:55:33,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 96 transitions, 380 flow [2022-11-25 17:55:33,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 96 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:55:33,964 INFO L231 Difference]: Finished difference. Result has 86 places, 80 transitions, 202 flow [2022-11-25 17:55:33,964 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, 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} [2022-11-25 17:55:33,965 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -3 predicate places. [2022-11-25 17:55:33,966 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 80 transitions, 202 flow [2022-11-25 17:55:33,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:33,966 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:33,966 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:55:33,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:55:33,967 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)] === [2022-11-25 17:55:33,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:33,968 INFO L85 PathProgramCache]: Analyzing trace with hash 47214, now seen corresponding path program 1 times [2022-11-25 17:55:33,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:33,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032013635] [2022-11-25 17:55:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:33,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:34,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:34,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032013635] [2022-11-25 17:55:34,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032013635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:55:34,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:55:34,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:55:34,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530254734] [2022-11-25 17:55:34,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:55:34,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:55:34,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:34,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:55:34,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:55:34,096 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 452 [2022-11-25 17:55:34,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 80 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:34,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:34,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 452 [2022-11-25 17:55:34,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:49,509 INFO L130 PetriNetUnfolder]: 113613/168791 cut-off events. [2022-11-25 17:55:49,509 INFO L131 PetriNetUnfolder]: For 7852/7852 co-relation queries the response was YES. [2022-11-25 17:55:49,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336064 conditions, 168791 events. 113613/168791 cut-off events. For 7852/7852 co-relation queries the response was YES. Maximal size of possible extension queue 5326. Compared 1439050 event pairs, 97133 based on Foata normal form. 0/123531 useless extension candidates. Maximal degree in co-relation 335956. Up to 134834 conditions per place. [2022-11-25 17:55:50,453 INFO L137 encePairwiseOnDemand]: 447/452 looper letters, 96 selfloop transitions, 3 changer transitions 0/116 dead transitions. [2022-11-25 17:55:50,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 116 transitions, 472 flow [2022-11-25 17:55:50,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:55:50,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:55:50,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 697 transitions. [2022-11-25 17:55:50,456 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5140117994100295 [2022-11-25 17:55:50,456 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 697 transitions. [2022-11-25 17:55:50,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 697 transitions. [2022-11-25 17:55:50,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:50,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 697 transitions. [2022-11-25 17:55:50,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:50,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:50,462 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:50,462 INFO L175 Difference]: Start difference. First operand has 86 places, 80 transitions, 202 flow. Second operand 3 states and 697 transitions. [2022-11-25 17:55:50,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 116 transitions, 472 flow [2022-11-25 17:55:50,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 116 transitions, 470 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:55:50,477 INFO L231 Difference]: Finished difference. Result has 85 places, 78 transitions, 202 flow [2022-11-25 17:55:50,477 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, 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} [2022-11-25 17:55:50,478 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -4 predicate places. [2022-11-25 17:55:50,478 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 78 transitions, 202 flow [2022-11-25 17:55:50,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:50,478 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:50,479 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:55:50,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:55:50,479 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)] === [2022-11-25 17:55:50,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:50,479 INFO L85 PathProgramCache]: Analyzing trace with hash 692346697, now seen corresponding path program 1 times [2022-11-25 17:55:50,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:50,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344523686] [2022-11-25 17:55:50,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:50,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:50,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:50,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344523686] [2022-11-25 17:55:50,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344523686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:55:50,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:55:50,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:55:50,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163752202] [2022-11-25 17:55:50,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:55:50,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:55:50,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:50,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:55:50,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:55:50,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 452 [2022-11-25 17:55:50,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 78 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 191.25) internal successors, (765), 4 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:50,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:50,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 452 [2022-11-25 17:55:50,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand