./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/mult-comm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/mult-comm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS --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 a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e --- 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-4e7fbc6 [2022-11-23 04:09:02,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 04:09:02,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 04:09:02,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 04:09:02,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 04:09:02,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 04:09:02,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 04:09:02,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 04:09:02,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 04:09:02,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 04:09:02,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 04:09:02,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 04:09:02,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 04:09:02,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 04:09:02,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 04:09:02,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 04:09:02,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 04:09:02,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 04:09:02,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 04:09:02,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 04:09:02,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 04:09:02,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 04:09:02,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 04:09:02,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 04:09:02,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 04:09:02,697 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 04:09:02,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 04:09:02,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 04:09:02,699 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 04:09:02,700 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 04:09:02,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 04:09:02,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 04:09:02,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 04:09:02,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 04:09:02,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 04:09:02,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 04:09:02,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 04:09:02,708 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 04:09:02,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 04:09:02,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 04:09:02,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 04:09:02,711 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 04:09:02,757 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 04:09:02,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 04:09:02,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 04:09:02,758 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 04:09:02,759 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 04:09:02,759 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 04:09:02,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 04:09:02,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 04:09:02,760 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 04:09:02,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 04:09:02,761 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 04:09:02,761 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 04:09:02,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 04:09:02,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 04:09:02,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 04:09:02,762 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 04:09:02,763 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 04:09:02,763 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 04:09:02,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 04:09:02,764 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 04:09:02,764 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 04:09:02,764 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 04:09:02,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 04:09:02,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 04:09:02,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 04:09:02,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 04:09:02,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 04:09:02,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 04:09:02,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 04:09:02,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 04:09:02,773 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 04:09:02,773 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 04:09:02,773 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 04:09:02,774 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_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e [2022-11-23 04:09:03,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 04:09:03,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 04:09:03,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 04:09:03,182 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 04:09:03,182 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 04:09:03,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/mult-comm.wvr.c [2022-11-23 04:09:06,681 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 04:09:06,923 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 04:09:06,924 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/sv-benchmarks/c/weaver/mult-comm.wvr.c [2022-11-23 04:09:06,948 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/data/eee6fcb95/598e9f1f4b824ee28102f7333546b096/FLAG388a831e6 [2022-11-23 04:09:06,966 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/data/eee6fcb95/598e9f1f4b824ee28102f7333546b096 [2022-11-23 04:09:06,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 04:09:06,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 04:09:06,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 04:09:06,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 04:09:06,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 04:09:06,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:09:06" (1/1) ... [2022-11-23 04:09:06,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24212336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:06, skipping insertion in model container [2022-11-23 04:09:06,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:09:06" (1/1) ... [2022-11-23 04:09:06,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 04:09:07,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 04:09:07,269 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_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/sv-benchmarks/c/weaver/mult-comm.wvr.c[1910,1923] [2022-11-23 04:09:07,279 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 04:09:07,294 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 04:09:07,339 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_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/sv-benchmarks/c/weaver/mult-comm.wvr.c[1910,1923] [2022-11-23 04:09:07,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 04:09:07,365 INFO L208 MainTranslator]: Completed translation [2022-11-23 04:09:07,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07 WrapperNode [2022-11-23 04:09:07,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 04:09:07,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 04:09:07,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 04:09:07,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 04:09:07,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 04:09:07,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 04:09:07,406 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2022-11-23 04:09:07,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 04:09:07,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 04:09:07,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 04:09:07,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 04:09:07,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 04:09:07,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 04:09:07,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 04:09:07,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 04:09:07,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 04:09:07,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 04:09:07,438 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 04:09:07,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 04:09:07,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 04:09:07,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 04:09:07,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 04:09:07,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 04:09:07,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 04:09:07,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 04:09:07,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:09:07,497 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 04:09:07,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 04:09:07,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 04:09:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 04:09:07,545 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 04:09:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 04:09:07,545 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 04:09:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 04:09:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 04:09:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 04:09:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 04:09:07,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 04:09:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 04:09:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 04:09:07,548 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 04:09:07,653 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 04:09:07,656 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 04:09:07,911 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 04:09:07,920 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 04:09:07,921 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 04:09:07,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:09:07 BoogieIcfgContainer [2022-11-23 04:09:07,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 04:09:07,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 04:09:07,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 04:09:07,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 04:09:07,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:09:06" (1/3) ... [2022-11-23 04:09:07,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ca44dd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:09:07, skipping insertion in model container [2022-11-23 04:09:07,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (2/3) ... [2022-11-23 04:09:07,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ca44dd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:09:07, skipping insertion in model container [2022-11-23 04:09:07,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:09:07" (3/3) ... [2022-11-23 04:09:07,939 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2022-11-23 04:09:07,962 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 04:09:07,962 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-23 04:09:07,962 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 04:09:08,112 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 04:09:08,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 92 transitions, 200 flow [2022-11-23 04:09:08,231 INFO L130 PetriNetUnfolder]: 5/90 cut-off events. [2022-11-23 04:09:08,231 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 04:09:08,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 90 events. 5/90 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-11-23 04:09:08,236 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 92 transitions, 200 flow [2022-11-23 04:09:08,241 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 85 transitions, 182 flow [2022-11-23 04:09:08,245 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 04:09:08,263 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 85 transitions, 182 flow [2022-11-23 04:09:08,266 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 85 transitions, 182 flow [2022-11-23 04:09:08,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 85 transitions, 182 flow [2022-11-23 04:09:08,293 INFO L130 PetriNetUnfolder]: 5/85 cut-off events. [2022-11-23 04:09:08,293 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 04:09:08,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 5/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-11-23 04:09:08,296 INFO L119 LiptonReduction]: Number of co-enabled transitions 660 [2022-11-23 04:09:11,868 INFO L134 LiptonReduction]: Checked pairs total: 693 [2022-11-23 04:09:11,869 INFO L136 LiptonReduction]: Total number of compositions: 80 [2022-11-23 04:09:11,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 04:09:11,896 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;@65b9cf2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 04:09:11,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-23 04:09:11,898 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-23 04:09:11,899 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 04:09:11,899 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:09:11,900 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-23 04:09:11,901 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:09:11,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:09:11,907 INFO L85 PathProgramCache]: Analyzing trace with hash 339, now seen corresponding path program 1 times [2022-11-23 04:09:11,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:09:11,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285706218] [2022-11-23 04:09:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:11,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:09:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:12,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:09:12,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285706218] [2022-11-23 04:09:12,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285706218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:09:12,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:09:12,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-23 04:09:12,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300951270] [2022-11-23 04:09:12,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:09:12,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 04:09:12,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:09:12,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 04:09:12,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 04:09:12,064 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 172 [2022-11-23 04:09:12,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 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) [2022-11-23 04:09:12,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:09:12,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 172 [2022-11-23 04:09:12,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:09:12,198 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2022-11-23 04:09:12,198 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-23 04:09:12,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 518 event pairs, 42 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2022-11-23 04:09:12,205 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2022-11-23 04:09:12,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2022-11-23 04:09:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 04:09:12,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-23 04:09:12,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 190 transitions. [2022-11-23 04:09:12,225 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5523255813953488 [2022-11-23 04:09:12,226 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 190 transitions. [2022-11-23 04:09:12,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 190 transitions. [2022-11-23 04:09:12,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:09:12,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 190 transitions. [2022-11-23 04:09:12,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 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) [2022-11-23 04:09:12,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 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) [2022-11-23 04:09:12,277 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 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) [2022-11-23 04:09:12,280 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 190 transitions. [2022-11-23 04:09:12,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2022-11-23 04:09:12,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 04:09:12,287 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2022-11-23 04:09:12,290 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2022-11-23 04:09:12,301 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2022-11-23 04:09:12,301 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2022-11-23 04:09:12,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 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) [2022-11-23 04:09:12,302 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:09:12,302 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 04:09:12,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 04:09:12,303 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:09:12,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:09:12,307 INFO L85 PathProgramCache]: Analyzing trace with hash 332086, now seen corresponding path program 1 times [2022-11-23 04:09:12,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:09:12,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424394268] [2022-11-23 04:09:12,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:12,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:09:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:12,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:09:12,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424394268] [2022-11-23 04:09:12,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424394268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:09:12,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:09:12,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 04:09:12,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078812534] [2022-11-23 04:09:12,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:09:12,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:09:12,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:09:12,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:09:12,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:09:12,668 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 172 [2022-11-23 04:09:12,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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) [2022-11-23 04:09:12,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:09:12,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 172 [2022-11-23 04:09:12,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:09:12,769 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2022-11-23 04:09:12,769 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 04:09:12,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 464 event pairs, 39 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2022-11-23 04:09:12,776 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2022-11-23 04:09:12,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2022-11-23 04:09:12,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:09:12,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:09:12,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 256 transitions. [2022-11-23 04:09:12,787 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2022-11-23 04:09:12,788 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 256 transitions. [2022-11-23 04:09:12,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 256 transitions. [2022-11-23 04:09:12,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:09:12,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 256 transitions. [2022-11-23 04:09:12,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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) [2022-11-23 04:09:12,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-11-23 04:09:12,802 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-11-23 04:09:12,803 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 256 transitions. [2022-11-23 04:09:12,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2022-11-23 04:09:12,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 04:09:12,805 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2022-11-23 04:09:12,806 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2022-11-23 04:09:12,807 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2022-11-23 04:09:12,807 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2022-11-23 04:09:12,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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) [2022-11-23 04:09:12,809 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:09:12,809 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 04:09:12,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 04:09:12,814 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:09:12,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:09:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash 332085, now seen corresponding path program 1 times [2022-11-23 04:09:12,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:09:12,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846179381] [2022-11-23 04:09:12,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:12,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:09:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:12,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:09:12,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846179381] [2022-11-23 04:09:12,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846179381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:09:12,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:09:12,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 04:09:12,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734789135] [2022-11-23 04:09:12,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:09:12,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:09:12,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:09:12,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:09:12,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:09:13,020 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 172 [2022-11-23 04:09:13,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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) [2022-11-23 04:09:13,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:09:13,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 172 [2022-11-23 04:09:13,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:09:13,101 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2022-11-23 04:09:13,101 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 04:09:13,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 408 event pairs, 36 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2022-11-23 04:09:13,103 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2022-11-23 04:09:13,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2022-11-23 04:09:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:09:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:09:13,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2022-11-23 04:09:13,106 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2022-11-23 04:09:13,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2022-11-23 04:09:13,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2022-11-23 04:09:13,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:09:13,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2022-11-23 04:09:13,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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) [2022-11-23 04:09:13,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-11-23 04:09:13,113 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-11-23 04:09:13,113 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 242 transitions. [2022-11-23 04:09:13,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2022-11-23 04:09:13,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:09:13,114 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2022-11-23 04:09:13,115 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2022-11-23 04:09:13,116 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-11-23 04:09:13,117 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2022-11-23 04:09:13,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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) [2022-11-23 04:09:13,117 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:09:13,118 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 04:09:13,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 04:09:13,119 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:09:13,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:09:13,119 INFO L85 PathProgramCache]: Analyzing trace with hash 319140038, now seen corresponding path program 1 times [2022-11-23 04:09:13,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:09:13,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995573341] [2022-11-23 04:09:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:13,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:09:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:13,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:09:13,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995573341] [2022-11-23 04:09:13,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995573341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:09:13,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:09:13,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 04:09:13,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197947198] [2022-11-23 04:09:13,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:09:13,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 04:09:13,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:09:13,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 04:09:13,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 04:09:13,361 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 172 [2022-11-23 04:09:13,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 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) [2022-11-23 04:09:13,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:09:13,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 172 [2022-11-23 04:09:13,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:09:13,414 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2022-11-23 04:09:13,415 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 04:09:13,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 291 event pairs, 27 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2022-11-23 04:09:13,420 INFO L137 encePairwiseOnDemand]: 170/172 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2022-11-23 04:09:13,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2022-11-23 04:09:13,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:09:13,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:09:13,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2022-11-23 04:09:13,427 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2022-11-23 04:09:13,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 228 transitions. [2022-11-23 04:09:13,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 228 transitions. [2022-11-23 04:09:13,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:09:13,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 228 transitions. [2022-11-23 04:09:13,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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) [2022-11-23 04:09:13,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-11-23 04:09:13,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-11-23 04:09:13,439 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 228 transitions. [2022-11-23 04:09:13,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2022-11-23 04:09:13,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:09:13,441 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2022-11-23 04:09:13,441 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2022-11-23 04:09:13,442 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-11-23 04:09:13,442 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2022-11-23 04:09:13,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 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) [2022-11-23 04:09:13,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:09:13,443 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 04:09:13,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 04:09:13,443 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:09:13,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:09:13,444 INFO L85 PathProgramCache]: Analyzing trace with hash 319140039, now seen corresponding path program 1 times [2022-11-23 04:09:13,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:09:13,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731328459] [2022-11-23 04:09:13,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:13,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:09:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:13,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:09:13,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731328459] [2022-11-23 04:09:13,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731328459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:09:13,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:09:13,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 04:09:13,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327520360] [2022-11-23 04:09:13,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:09:13,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:09:13,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:09:13,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:09:13,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:09:13,579 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 172 [2022-11-23 04:09:13,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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) [2022-11-23 04:09:13,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:09:13,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 172 [2022-11-23 04:09:13,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:09:13,621 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2022-11-23 04:09:13,621 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 04:09:13,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 173 event pairs, 18 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2022-11-23 04:09:13,622 INFO L137 encePairwiseOnDemand]: 170/172 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2022-11-23 04:09:13,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2022-11-23 04:09:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:09:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:09:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2022-11-23 04:09:13,624 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2022-11-23 04:09:13,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2022-11-23 04:09:13,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2022-11-23 04:09:13,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:09:13,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2022-11-23 04:09:13,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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) [2022-11-23 04:09:13,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-11-23 04:09:13,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-11-23 04:09:13,628 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 242 transitions. [2022-11-23 04:09:13,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2022-11-23 04:09:13,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:09:13,630 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2022-11-23 04:09:13,630 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2022-11-23 04:09:13,634 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-11-23 04:09:13,634 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2022-11-23 04:09:13,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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) [2022-11-23 04:09:13,636 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:09:13,636 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:09:13,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 04:09:13,636 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:09:13,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:09:13,637 INFO L85 PathProgramCache]: Analyzing trace with hash 682968972, now seen corresponding path program 1 times [2022-11-23 04:09:13,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:09:13,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877977807] [2022-11-23 04:09:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:13,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:09:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:14,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:09:14,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877977807] [2022-11-23 04:09:14,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877977807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:09:14,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:09:14,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 04:09:14,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524420576] [2022-11-23 04:09:14,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:09:14,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:09:14,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:09:14,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:09:14,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:09:14,060 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 172 [2022-11-23 04:09:14,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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) [2022-11-23 04:09:14,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:09:14,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 172 [2022-11-23 04:09:14,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:09:14,133 INFO L130 PetriNetUnfolder]: 65/114 cut-off events. [2022-11-23 04:09:14,133 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 04:09:14,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 114 events. 65/114 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 316 event pairs, 9 based on Foata normal form. 1/75 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2022-11-23 04:09:14,135 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2022-11-23 04:09:14,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 108 flow [2022-11-23 04:09:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:09:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:09:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2022-11-23 04:09:14,137 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5232558139534884 [2022-11-23 04:09:14,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2022-11-23 04:09:14,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2022-11-23 04:09:14,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:09:14,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2022-11-23 04:09:14,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2022-11-23 04:09:14,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-11-23 04:09:14,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-11-23 04:09:14,142 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 270 transitions. [2022-11-23 04:09:14,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 108 flow [2022-11-23 04:09:14,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:09:14,144 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 57 flow [2022-11-23 04:09:14,144 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2022-11-23 04:09:14,145 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2022-11-23 04:09:14,145 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 57 flow [2022-11-23 04:09:14,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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) [2022-11-23 04:09:14,146 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:09:14,146 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:09:14,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 04:09:14,147 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:09:14,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:09:14,147 INFO L85 PathProgramCache]: Analyzing trace with hash 112994951, now seen corresponding path program 1 times [2022-11-23 04:09:14,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:09:14,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877853916] [2022-11-23 04:09:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:14,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:09:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:14,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:09:14,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877853916] [2022-11-23 04:09:14,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877853916] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:09:14,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043527260] [2022-11-23 04:09:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:14,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:09:14,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:09:14,490 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:09:14,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 04:09:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:14,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 04:09:14,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:09:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:14,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:09:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:15,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043527260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:09:15,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:09:15,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2022-11-23 04:09:15,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768848610] [2022-11-23 04:09:15,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:09:15,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 04:09:15,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:09:15,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 04:09:15,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-23 04:09:15,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 172 [2022-11-23 04:09:15,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 57 flow. Second operand has 11 states, 11 states have (on average 73.72727272727273) internal successors, (811), 11 states have internal predecessors, (811), 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) [2022-11-23 04:09:15,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:09:15,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 172 [2022-11-23 04:09:15,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:09:15,742 INFO L130 PetriNetUnfolder]: 78/152 cut-off events. [2022-11-23 04:09:15,742 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-23 04:09:15,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 152 events. 78/152 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 441 event pairs, 14 based on Foata normal form. 1/153 useless extension candidates. Maximal degree in co-relation 370. Up to 77 conditions per place. [2022-11-23 04:09:15,744 INFO L137 encePairwiseOnDemand]: 165/172 looper letters, 26 selfloop transitions, 5 changer transitions 20/51 dead transitions. [2022-11-23 04:09:15,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 51 transitions, 247 flow [2022-11-23 04:09:15,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 04:09:15,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 04:09:15,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 549 transitions. [2022-11-23 04:09:15,749 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45598006644518274 [2022-11-23 04:09:15,749 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 549 transitions. [2022-11-23 04:09:15,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 549 transitions. [2022-11-23 04:09:15,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:09:15,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 549 transitions. [2022-11-23 04:09:15,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.42857142857143) internal successors, (549), 7 states have internal predecessors, (549), 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) [2022-11-23 04:09:15,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 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) [2022-11-23 04:09:15,756 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 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) [2022-11-23 04:09:15,756 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 57 flow. Second operand 7 states and 549 transitions. [2022-11-23 04:09:15,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 51 transitions, 247 flow [2022-11-23 04:09:15,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 51 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:09:15,760 INFO L231 Difference]: Finished difference. Result has 33 places, 19 transitions, 84 flow [2022-11-23 04:09:15,760 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=19} [2022-11-23 04:09:15,761 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2022-11-23 04:09:15,761 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 19 transitions, 84 flow [2022-11-23 04:09:15,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 73.72727272727273) internal successors, (811), 11 states have internal predecessors, (811), 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) [2022-11-23 04:09:15,762 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:09:15,762 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:09:15,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 04:09:15,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:09:15,970 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:09:15,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:09:15,970 INFO L85 PathProgramCache]: Analyzing trace with hash 575728535, now seen corresponding path program 2 times [2022-11-23 04:09:15,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:09:15,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054425927] [2022-11-23 04:09:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:15,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:09:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:16,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:09:16,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054425927] [2022-11-23 04:09:16,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054425927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:09:16,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939773578] [2022-11-23 04:09:16,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:09:16,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:09:16,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:09:16,516 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:09:16,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 04:09:16,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:09:16,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:09:16,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 04:09:16,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:09:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:16,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:09:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:19,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939773578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:09:19,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:09:19,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-11-23 04:09:19,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021468149] [2022-11-23 04:09:19,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:09:19,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 04:09:19,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:09:19,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 04:09:19,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=80, Unknown=1, NotChecked=0, Total=132 [2022-11-23 04:09:19,372 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 172 [2022-11-23 04:09:19,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 19 transitions, 84 flow. Second operand has 12 states, 12 states have (on average 74.5) internal successors, (894), 12 states have internal predecessors, (894), 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) [2022-11-23 04:09:19,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:09:19,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 172 [2022-11-23 04:09:19,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:09:19,670 INFO L130 PetriNetUnfolder]: 121/224 cut-off events. [2022-11-23 04:09:19,670 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2022-11-23 04:09:19,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 224 events. 121/224 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 782 event pairs, 13 based on Foata normal form. 3/227 useless extension candidates. Maximal degree in co-relation 607. Up to 98 conditions per place. [2022-11-23 04:09:19,672 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 39 selfloop transitions, 17 changer transitions 12/69 dead transitions. [2022-11-23 04:09:19,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 69 transitions, 363 flow [2022-11-23 04:09:19,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 04:09:19,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-23 04:09:19,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 790 transitions. [2022-11-23 04:09:19,676 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2022-11-23 04:09:19,676 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 790 transitions. [2022-11-23 04:09:19,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 790 transitions. [2022-11-23 04:09:19,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:09:19,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 790 transitions. [2022-11-23 04:09:19,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 79.0) internal successors, (790), 10 states have internal predecessors, (790), 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) [2022-11-23 04:09:19,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 172.0) internal successors, (1892), 11 states have internal predecessors, (1892), 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) [2022-11-23 04:09:19,684 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 172.0) internal successors, (1892), 11 states have internal predecessors, (1892), 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) [2022-11-23 04:09:19,684 INFO L175 Difference]: Start difference. First operand has 33 places, 19 transitions, 84 flow. Second operand 10 states and 790 transitions. [2022-11-23 04:09:19,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 69 transitions, 363 flow [2022-11-23 04:09:19,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 69 transitions, 343 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-11-23 04:09:19,687 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 179 flow [2022-11-23 04:09:19,688 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=179, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2022-11-23 04:09:19,688 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 11 predicate places. [2022-11-23 04:09:19,688 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 179 flow [2022-11-23 04:09:19,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 74.5) internal successors, (894), 12 states have internal predecessors, (894), 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) [2022-11-23 04:09:19,689 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:09:19,689 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:09:19,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 04:09:19,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:09:19,896 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:09:19,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:09:19,896 INFO L85 PathProgramCache]: Analyzing trace with hash 435684627, now seen corresponding path program 1 times [2022-11-23 04:09:19,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:09:19,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786371978] [2022-11-23 04:09:19,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:19,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:09:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:20,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:09:20,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786371978] [2022-11-23 04:09:20,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786371978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:09:20,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606820107] [2022-11-23 04:09:20,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:20,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:09:20,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:09:20,208 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:09:20,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 04:09:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:20,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 04:09:20,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:09:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:20,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:09:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:21,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606820107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:09:21,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:09:21,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2022-11-23 04:09:21,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293039930] [2022-11-23 04:09:21,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:09:21,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 04:09:21,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:09:21,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 04:09:21,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 04:09:21,183 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 172 [2022-11-23 04:09:21,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 179 flow. Second operand has 9 states, 9 states have (on average 76.88888888888889) internal successors, (692), 9 states have internal predecessors, (692), 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) [2022-11-23 04:09:21,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:09:21,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 172 [2022-11-23 04:09:21,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:09:21,417 INFO L130 PetriNetUnfolder]: 110/212 cut-off events. [2022-11-23 04:09:21,418 INFO L131 PetriNetUnfolder]: For 293/312 co-relation queries the response was YES. [2022-11-23 04:09:21,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 212 events. 110/212 cut-off events. For 293/312 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 775 event pairs, 16 based on Foata normal form. 15/218 useless extension candidates. Maximal degree in co-relation 707. Up to 168 conditions per place. [2022-11-23 04:09:21,420 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 30 selfloop transitions, 6 changer transitions 13/52 dead transitions. [2022-11-23 04:09:21,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 341 flow [2022-11-23 04:09:21,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 04:09:21,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 04:09:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 482 transitions. [2022-11-23 04:09:21,424 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46705426356589147 [2022-11-23 04:09:21,424 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 482 transitions. [2022-11-23 04:09:21,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 482 transitions. [2022-11-23 04:09:21,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:09:21,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 482 transitions. [2022-11-23 04:09:21,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.33333333333333) internal successors, (482), 6 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) [2022-11-23 04:09:21,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 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) [2022-11-23 04:09:21,429 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 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) [2022-11-23 04:09:21,430 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 179 flow. Second operand 6 states and 482 transitions. [2022-11-23 04:09:21,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 341 flow [2022-11-23 04:09:21,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 52 transitions, 289 flow, removed 18 selfloop flow, removed 4 redundant places. [2022-11-23 04:09:21,438 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 163 flow [2022-11-23 04:09:21,439 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2022-11-23 04:09:21,440 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2022-11-23 04:09:21,440 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 163 flow [2022-11-23 04:09:21,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 76.88888888888889) internal successors, (692), 9 states have internal predecessors, (692), 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) [2022-11-23 04:09:21,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:09:21,442 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:09:21,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 04:09:21,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 04:09:21,649 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:09:21,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:09:21,650 INFO L85 PathProgramCache]: Analyzing trace with hash -936835127, now seen corresponding path program 2 times [2022-11-23 04:09:21,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:09:21,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789850837] [2022-11-23 04:09:21,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:21,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:09:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:22,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:09:22,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789850837] [2022-11-23 04:09:22,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789850837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:09:22,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147811375] [2022-11-23 04:09:22,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:09:22,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:09:22,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:09:22,043 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:09:22,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 04:09:22,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:09:22,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:09:22,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 04:09:22,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:09:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:22,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:09:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:22,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147811375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:09:22,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:09:22,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2022-11-23 04:09:22,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104461738] [2022-11-23 04:09:22,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:09:22,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 04:09:22,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:09:22,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 04:09:22,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-23 04:09:22,694 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 172 [2022-11-23 04:09:22,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 163 flow. Second operand has 10 states, 10 states have (on average 76.8) internal successors, (768), 10 states have internal predecessors, (768), 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) [2022-11-23 04:09:22,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:09:22,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 172 [2022-11-23 04:09:22,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:09:23,075 INFO L130 PetriNetUnfolder]: 141/273 cut-off events. [2022-11-23 04:09:23,076 INFO L131 PetriNetUnfolder]: For 312/330 co-relation queries the response was YES. [2022-11-23 04:09:23,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 273 events. 141/273 cut-off events. For 312/330 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1062 event pairs, 18 based on Foata normal form. 15/279 useless extension candidates. Maximal degree in co-relation 861. Up to 184 conditions per place. [2022-11-23 04:09:23,078 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 47 selfloop transitions, 15 changer transitions 6/71 dead transitions. [2022-11-23 04:09:23,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 71 transitions, 441 flow [2022-11-23 04:09:23,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 04:09:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 04:09:23,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 725 transitions. [2022-11-23 04:09:23,082 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46834625322997414 [2022-11-23 04:09:23,082 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 725 transitions. [2022-11-23 04:09:23,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 725 transitions. [2022-11-23 04:09:23,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:09:23,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 725 transitions. [2022-11-23 04:09:23,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 80.55555555555556) internal successors, (725), 9 states have internal predecessors, (725), 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) [2022-11-23 04:09:23,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 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) [2022-11-23 04:09:23,089 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 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) [2022-11-23 04:09:23,090 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 163 flow. Second operand 9 states and 725 transitions. [2022-11-23 04:09:23,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 71 transitions, 441 flow [2022-11-23 04:09:23,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 71 transitions, 428 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-23 04:09:23,094 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 236 flow [2022-11-23 04:09:23,099 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=236, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2022-11-23 04:09:23,100 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2022-11-23 04:09:23,100 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 236 flow [2022-11-23 04:09:23,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 76.8) internal successors, (768), 10 states have internal predecessors, (768), 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) [2022-11-23 04:09:23,101 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:09:23,101 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:09:23,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 04:09:23,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:09:23,309 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:09:23,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:09:23,309 INFO L85 PathProgramCache]: Analyzing trace with hash 553070017, now seen corresponding path program 3 times [2022-11-23 04:09:23,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:09:23,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451022681] [2022-11-23 04:09:23,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:23,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:09:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:23,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:09:23,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451022681] [2022-11-23 04:09:23,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451022681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:09:23,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091427325] [2022-11-23 04:09:23,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 04:09:23,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:09:23,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:09:23,654 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:09:23,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 04:09:23,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 04:09:23,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:09:23,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 04:09:23,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:09:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:23,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:09:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:24,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091427325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:09:24,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:09:24,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2022-11-23 04:09:24,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983314345] [2022-11-23 04:09:24,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:09:24,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 04:09:24,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:09:24,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 04:09:24,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-23 04:09:24,209 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 172 [2022-11-23 04:09:24,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 236 flow. Second operand has 10 states, 10 states have (on average 76.9) internal successors, (769), 10 states have internal predecessors, (769), 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) [2022-11-23 04:09:24,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:09:24,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 172 [2022-11-23 04:09:24,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:09:24,581 INFO L130 PetriNetUnfolder]: 168/333 cut-off events. [2022-11-23 04:09:24,581 INFO L131 PetriNetUnfolder]: For 522/522 co-relation queries the response was YES. [2022-11-23 04:09:24,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1154 conditions, 333 events. 168/333 cut-off events. For 522/522 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1361 event pairs, 36 based on Foata normal form. 3/334 useless extension candidates. Maximal degree in co-relation 1139. Up to 262 conditions per place. [2022-11-23 04:09:24,585 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 50 selfloop transitions, 15 changer transitions 12/79 dead transitions. [2022-11-23 04:09:24,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 538 flow [2022-11-23 04:09:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 04:09:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 04:09:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 725 transitions. [2022-11-23 04:09:24,589 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46834625322997414 [2022-11-23 04:09:24,589 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 725 transitions. [2022-11-23 04:09:24,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 725 transitions. [2022-11-23 04:09:24,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:09:24,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 725 transitions. [2022-11-23 04:09:24,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 80.55555555555556) internal successors, (725), 9 states have internal predecessors, (725), 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) [2022-11-23 04:09:24,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 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) [2022-11-23 04:09:24,596 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 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) [2022-11-23 04:09:24,596 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 236 flow. Second operand 9 states and 725 transitions. [2022-11-23 04:09:24,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 538 flow [2022-11-23 04:09:24,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 79 transitions, 495 flow, removed 16 selfloop flow, removed 3 redundant places. [2022-11-23 04:09:24,604 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 306 flow [2022-11-23 04:09:24,604 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=306, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2022-11-23 04:09:24,605 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 31 predicate places. [2022-11-23 04:09:24,605 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 306 flow [2022-11-23 04:09:24,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 76.9) internal successors, (769), 10 states have internal predecessors, (769), 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) [2022-11-23 04:09:24,606 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:09:24,606 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:09:24,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 04:09:24,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:09:24,818 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:09:24,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:09:24,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1903603341, now seen corresponding path program 3 times [2022-11-23 04:09:24,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:09:24,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288785210] [2022-11-23 04:09:24,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:24,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:09:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:25,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:09:25,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288785210] [2022-11-23 04:09:25,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288785210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:09:25,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019122651] [2022-11-23 04:09:25,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 04:09:25,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:09:25,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:09:25,143 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:09:25,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 04:09:25,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 04:09:25,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:09:25,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 04:09:25,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:09:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:25,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:09:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 04:09:25,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019122651] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 04:09:25,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 04:09:25,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 9 [2022-11-23 04:09:25,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108397921] [2022-11-23 04:09:25,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:09:25,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 04:09:25,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:09:25,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 04:09:25,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-11-23 04:09:25,631 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 172 [2022-11-23 04:09:25,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 306 flow. Second operand has 5 states, 5 states have (on average 76.6) internal successors, (383), 5 states have internal predecessors, (383), 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) [2022-11-23 04:09:25,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:09:25,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 172 [2022-11-23 04:09:25,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:09:25,765 INFO L130 PetriNetUnfolder]: 177/350 cut-off events. [2022-11-23 04:09:25,765 INFO L131 PetriNetUnfolder]: For 828/838 co-relation queries the response was YES. [2022-11-23 04:09:25,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1290 conditions, 350 events. 177/350 cut-off events. For 828/838 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1494 event pairs, 45 based on Foata normal form. 7/345 useless extension candidates. Maximal degree in co-relation 1271. Up to 309 conditions per place. [2022-11-23 04:09:25,769 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 48 selfloop transitions, 10 changer transitions 2/63 dead transitions. [2022-11-23 04:09:25,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 63 transitions, 491 flow [2022-11-23 04:09:25,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 04:09:25,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 04:09:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 400 transitions. [2022-11-23 04:09:25,772 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2022-11-23 04:09:25,773 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 400 transitions. [2022-11-23 04:09:25,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 400 transitions. [2022-11-23 04:09:25,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:09:25,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 400 transitions. [2022-11-23 04:09:25,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 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) [2022-11-23 04:09:25,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 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) [2022-11-23 04:09:25,777 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 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) [2022-11-23 04:09:25,777 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 306 flow. Second operand 5 states and 400 transitions. [2022-11-23 04:09:25,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 63 transitions, 491 flow [2022-11-23 04:09:25,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 63 transitions, 452 flow, removed 14 selfloop flow, removed 3 redundant places. [2022-11-23 04:09:25,786 INFO L231 Difference]: Finished difference. Result has 63 places, 54 transitions, 338 flow [2022-11-23 04:09:25,786 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=338, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2022-11-23 04:09:25,788 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2022-11-23 04:09:25,788 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 338 flow [2022-11-23 04:09:25,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.6) internal successors, (383), 5 states have internal predecessors, (383), 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) [2022-11-23 04:09:25,789 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:09:25,789 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:09:25,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 04:09:25,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 04:09:25,998 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:09:25,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:09:25,998 INFO L85 PathProgramCache]: Analyzing trace with hash -398159076, now seen corresponding path program 1 times [2022-11-23 04:09:25,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:09:25,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434073748] [2022-11-23 04:09:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:25,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:09:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:26,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:09:26,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434073748] [2022-11-23 04:09:26,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434073748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:09:26,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174739778] [2022-11-23 04:09:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:26,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:09:26,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:09:26,867 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:09:26,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 04:09:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:26,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 04:09:26,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:09:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:27,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:09:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:31,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174739778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:09:31,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:09:31,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2022-11-23 04:09:31,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345410367] [2022-11-23 04:09:31,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:09:31,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 04:09:31,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:09:31,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 04:09:31,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-11-23 04:09:31,999 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 172 [2022-11-23 04:09:32,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 338 flow. Second operand has 19 states, 19 states have (on average 69.84210526315789) internal successors, (1327), 19 states have internal predecessors, (1327), 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) [2022-11-23 04:09:32,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:09:32,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 172 [2022-11-23 04:09:32,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:09:35,753 INFO L130 PetriNetUnfolder]: 323/655 cut-off events. [2022-11-23 04:09:35,753 INFO L131 PetriNetUnfolder]: For 1669/1669 co-relation queries the response was YES. [2022-11-23 04:09:35,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2479 conditions, 655 events. 323/655 cut-off events. For 1669/1669 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3486 event pairs, 5 based on Foata normal form. 3/656 useless extension candidates. Maximal degree in co-relation 2458. Up to 193 conditions per place. [2022-11-23 04:09:35,759 INFO L137 encePairwiseOnDemand]: 164/172 looper letters, 101 selfloop transitions, 68 changer transitions 30/199 dead transitions. [2022-11-23 04:09:35,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 199 transitions, 1495 flow [2022-11-23 04:09:35,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 04:09:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-23 04:09:35,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1941 transitions. [2022-11-23 04:09:35,767 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4340339892665474 [2022-11-23 04:09:35,768 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1941 transitions. [2022-11-23 04:09:35,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1941 transitions. [2022-11-23 04:09:35,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:09:35,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1941 transitions. [2022-11-23 04:09:35,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 74.65384615384616) internal successors, (1941), 26 states have internal predecessors, (1941), 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) [2022-11-23 04:09:35,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 172.0) internal successors, (4644), 27 states have internal predecessors, (4644), 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) [2022-11-23 04:09:35,785 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 172.0) internal successors, (4644), 27 states have internal predecessors, (4644), 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) [2022-11-23 04:09:35,786 INFO L175 Difference]: Start difference. First operand has 63 places, 54 transitions, 338 flow. Second operand 26 states and 1941 transitions. [2022-11-23 04:09:35,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 199 transitions, 1495 flow [2022-11-23 04:09:35,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 199 transitions, 1463 flow, removed 14 selfloop flow, removed 2 redundant places. [2022-11-23 04:09:35,801 INFO L231 Difference]: Finished difference. Result has 101 places, 92 transitions, 949 flow [2022-11-23 04:09:35,802 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=949, PETRI_PLACES=101, PETRI_TRANSITIONS=92} [2022-11-23 04:09:35,802 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 72 predicate places. [2022-11-23 04:09:35,803 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 92 transitions, 949 flow [2022-11-23 04:09:35,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 69.84210526315789) internal successors, (1327), 19 states have internal predecessors, (1327), 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) [2022-11-23 04:09:35,804 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:09:35,804 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:09:35,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 04:09:36,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 04:09:36,011 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:09:36,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:09:36,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1149049316, now seen corresponding path program 2 times [2022-11-23 04:09:36,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:09:36,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71077929] [2022-11-23 04:09:36,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:36,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:09:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:36,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:09:36,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71077929] [2022-11-23 04:09:36,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71077929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:09:36,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337752546] [2022-11-23 04:09:36,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:09:36,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:09:36,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:09:36,719 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:09:36,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 04:09:36,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:09:36,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:09:36,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 04:09:36,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:09:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:39,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:09:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:41,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337752546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:09:41,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:09:41,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2022-11-23 04:09:41,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471996630] [2022-11-23 04:09:41,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:09:41,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 04:09:41,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:09:41,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 04:09:41,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-23 04:09:43,094 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 172 [2022-11-23 04:09:43,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 92 transitions, 949 flow. Second operand has 18 states, 18 states have (on average 69.94444444444444) internal successors, (1259), 18 states have internal predecessors, (1259), 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) [2022-11-23 04:09:43,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:09:43,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 172 [2022-11-23 04:09:43,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:09:47,112 INFO L130 PetriNetUnfolder]: 335/700 cut-off events. [2022-11-23 04:09:47,113 INFO L131 PetriNetUnfolder]: For 5218/5218 co-relation queries the response was YES. [2022-11-23 04:09:47,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3579 conditions, 700 events. 335/700 cut-off events. For 5218/5218 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3851 event pairs, 7 based on Foata normal form. 5/703 useless extension candidates. Maximal degree in co-relation 3545. Up to 282 conditions per place. [2022-11-23 04:09:47,121 INFO L137 encePairwiseOnDemand]: 164/172 looper letters, 113 selfloop transitions, 68 changer transitions 43/224 dead transitions. [2022-11-23 04:09:47,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 224 transitions, 2251 flow [2022-11-23 04:09:47,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-23 04:09:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-23 04:09:47,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2062 transitions. [2022-11-23 04:09:47,130 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.428156146179402 [2022-11-23 04:09:47,130 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2062 transitions. [2022-11-23 04:09:47,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2062 transitions. [2022-11-23 04:09:47,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:09:47,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2062 transitions. [2022-11-23 04:09:47,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 73.64285714285714) internal successors, (2062), 28 states have internal predecessors, (2062), 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) [2022-11-23 04:09:47,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 172.0) internal successors, (4988), 29 states have internal predecessors, (4988), 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) [2022-11-23 04:09:47,193 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 172.0) internal successors, (4988), 29 states have internal predecessors, (4988), 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) [2022-11-23 04:09:47,193 INFO L175 Difference]: Start difference. First operand has 101 places, 92 transitions, 949 flow. Second operand 28 states and 2062 transitions. [2022-11-23 04:09:47,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 224 transitions, 2251 flow [2022-11-23 04:09:47,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 224 transitions, 1925 flow, removed 143 selfloop flow, removed 10 redundant places. [2022-11-23 04:09:47,236 INFO L231 Difference]: Finished difference. Result has 120 places, 118 transitions, 1152 flow [2022-11-23 04:09:47,237 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1152, PETRI_PLACES=120, PETRI_TRANSITIONS=118} [2022-11-23 04:09:47,237 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 91 predicate places. [2022-11-23 04:09:47,237 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 118 transitions, 1152 flow [2022-11-23 04:09:47,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 69.94444444444444) internal successors, (1259), 18 states have internal predecessors, (1259), 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) [2022-11-23 04:09:47,238 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:09:47,239 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:09:47,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 04:09:47,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 04:09:47,446 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:09:47,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:09:47,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1923681223, now seen corresponding path program 3 times [2022-11-23 04:09:47,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:09:47,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141742833] [2022-11-23 04:09:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:47,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:09:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:48,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:09:48,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141742833] [2022-11-23 04:09:48,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141742833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:09:48,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427386831] [2022-11-23 04:09:48,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 04:09:48,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:09:48,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:09:48,963 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:09:48,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 04:09:49,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 04:09:49,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:09:49,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 04:09:49,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:09:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:49,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:10:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:10:30,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427386831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:10:30,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:10:30,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-11-23 04:10:30,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854889200] [2022-11-23 04:10:30,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:10:30,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 04:10:30,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:10:30,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 04:10:30,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=386, Unknown=16, NotChecked=0, Total=506 [2022-11-23 04:10:32,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:10:34,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:10:36,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:10:38,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:10:40,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:10:42,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:10:44,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:10:46,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:10:48,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:10:50,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:10:52,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:10:54,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:10:56,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:10:58,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:11:00,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:11:02,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:11:05,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:11:07,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:11:09,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:11:09,070 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 172 [2022-11-23 04:11:09,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 118 transitions, 1152 flow. Second operand has 23 states, 23 states have (on average 66.65217391304348) internal successors, (1533), 23 states have internal predecessors, (1533), 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) [2022-11-23 04:11:09,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:11:09,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 172 [2022-11-23 04:11:09,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:11:16,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 04:11:32,333 WARN L233 SmtUtils]: Spent 7.12s on a formula simplification. DAG size of input: 83 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 04:11:38,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:11:40,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:11:47,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 04:11:56,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:12:13,341 WARN L233 SmtUtils]: Spent 15.28s on a formula simplification. DAG size of input: 67 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 04:12:17,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:12:33,048 WARN L233 SmtUtils]: Spent 7.84s on a formula simplification. DAG size of input: 79 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 04:12:35,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:12:41,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:12:44,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 04:12:44,336 INFO L130 PetriNetUnfolder]: 388/800 cut-off events. [2022-11-23 04:12:44,336 INFO L131 PetriNetUnfolder]: For 4541/4541 co-relation queries the response was YES. [2022-11-23 04:12:44,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3929 conditions, 800 events. 388/800 cut-off events. For 4541/4541 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4465 event pairs, 5 based on Foata normal form. 7/805 useless extension candidates. Maximal degree in co-relation 3892. Up to 247 conditions per place. [2022-11-23 04:12:44,344 INFO L137 encePairwiseOnDemand]: 164/172 looper letters, 127 selfloop transitions, 110 changer transitions 26/263 dead transitions. [2022-11-23 04:12:44,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 263 transitions, 2568 flow [2022-11-23 04:12:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 04:12:44,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-23 04:12:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2344 transitions. [2022-11-23 04:12:44,349 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41296687808315713 [2022-11-23 04:12:44,350 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2344 transitions. [2022-11-23 04:12:44,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2344 transitions. [2022-11-23 04:12:44,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:12:44,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2344 transitions. [2022-11-23 04:12:44,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 71.03030303030303) internal successors, (2344), 33 states have internal predecessors, (2344), 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) [2022-11-23 04:12:44,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 172.0) internal successors, (5848), 34 states have internal predecessors, (5848), 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) [2022-11-23 04:12:44,364 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 172.0) internal successors, (5848), 34 states have internal predecessors, (5848), 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) [2022-11-23 04:12:44,365 INFO L175 Difference]: Start difference. First operand has 120 places, 118 transitions, 1152 flow. Second operand 33 states and 2344 transitions. [2022-11-23 04:12:44,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 263 transitions, 2568 flow [2022-11-23 04:12:44,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 263 transitions, 2274 flow, removed 119 selfloop flow, removed 17 redundant places. [2022-11-23 04:12:44,404 INFO L231 Difference]: Finished difference. Result has 138 places, 149 transitions, 1595 flow [2022-11-23 04:12:44,405 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1595, PETRI_PLACES=138, PETRI_TRANSITIONS=149} [2022-11-23 04:12:44,405 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 109 predicate places. [2022-11-23 04:12:44,405 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 149 transitions, 1595 flow [2022-11-23 04:12:44,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 66.65217391304348) internal successors, (1533), 23 states have internal predecessors, (1533), 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) [2022-11-23 04:12:44,406 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:12:44,406 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:12:44,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 04:12:44,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 04:12:44,616 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:12:44,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:12:44,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2088583640, now seen corresponding path program 4 times [2022-11-23 04:12:44,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:12:44,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585745491] [2022-11-23 04:12:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:12:44,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:12:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:12:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:12:45,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:12:45,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585745491] [2022-11-23 04:12:45,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585745491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:12:45,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498558243] [2022-11-23 04:12:45,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 04:12:45,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:12:45,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:12:45,167 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:12:45,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 04:12:45,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 04:12:45,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:12:45,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 04:12:45,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:12:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:12:45,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:12:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:12:51,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498558243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:12:51,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:12:51,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-23 04:12:51,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928629686] [2022-11-23 04:12:51,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:12:51,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 04:12:51,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:12:51,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 04:12:51,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=262, Unknown=1, NotChecked=0, Total=342 [2022-11-23 04:12:53,980 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 172 [2022-11-23 04:12:53,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 149 transitions, 1595 flow. Second operand has 19 states, 19 states have (on average 66.89473684210526) internal successors, (1271), 19 states have internal predecessors, (1271), 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) [2022-11-23 04:12:53,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:12:53,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 172 [2022-11-23 04:12:53,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:12:58,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 04:13:07,785 INFO L130 PetriNetUnfolder]: 457/916 cut-off events. [2022-11-23 04:13:07,785 INFO L131 PetriNetUnfolder]: For 4893/4893 co-relation queries the response was YES. [2022-11-23 04:13:07,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4760 conditions, 916 events. 457/916 cut-off events. For 4893/4893 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5113 event pairs, 34 based on Foata normal form. 2/914 useless extension candidates. Maximal degree in co-relation 4722. Up to 570 conditions per place. [2022-11-23 04:13:07,795 INFO L137 encePairwiseOnDemand]: 163/172 looper letters, 142 selfloop transitions, 81 changer transitions 16/239 dead transitions. [2022-11-23 04:13:07,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 239 transitions, 2709 flow [2022-11-23 04:13:07,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 04:13:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-23 04:13:07,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1337 transitions. [2022-11-23 04:13:07,799 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4091187270501836 [2022-11-23 04:13:07,799 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1337 transitions. [2022-11-23 04:13:07,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1337 transitions. [2022-11-23 04:13:07,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:07,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1337 transitions. [2022-11-23 04:13:07,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 70.36842105263158) internal successors, (1337), 19 states have internal predecessors, (1337), 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) [2022-11-23 04:13:07,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 172.0) internal successors, (3440), 20 states have internal predecessors, (3440), 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) [2022-11-23 04:13:07,808 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 172.0) internal successors, (3440), 20 states have internal predecessors, (3440), 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) [2022-11-23 04:13:07,808 INFO L175 Difference]: Start difference. First operand has 138 places, 149 transitions, 1595 flow. Second operand 19 states and 1337 transitions. [2022-11-23 04:13:07,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 239 transitions, 2709 flow [2022-11-23 04:13:07,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 239 transitions, 2339 flow, removed 101 selfloop flow, removed 18 redundant places. [2022-11-23 04:13:07,864 INFO L231 Difference]: Finished difference. Result has 143 places, 184 transitions, 1902 flow [2022-11-23 04:13:07,864 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1902, PETRI_PLACES=143, PETRI_TRANSITIONS=184} [2022-11-23 04:13:07,865 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 114 predicate places. [2022-11-23 04:13:07,865 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 184 transitions, 1902 flow [2022-11-23 04:13:07,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 66.89473684210526) internal successors, (1271), 19 states have internal predecessors, (1271), 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) [2022-11-23 04:13:07,866 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:07,866 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:13:07,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 04:13:08,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 04:13:08,072 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:13:08,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:08,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1764416412, now seen corresponding path program 5 times [2022-11-23 04:13:08,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:08,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246811993] [2022-11-23 04:13:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:08,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:13:08,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:08,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246811993] [2022-11-23 04:13:08,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246811993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:13:08,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338565780] [2022-11-23 04:13:08,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 04:13:08,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:13:08,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:13:08,695 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:13:08,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 04:13:08,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-23 04:13:08,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:13:08,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 04:13:08,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:13:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:13:09,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:13:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:13:13,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338565780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:13:13,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:13:13,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2022-11-23 04:13:13,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762138135] [2022-11-23 04:13:13,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:13:13,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 04:13:13,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:13:13,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 04:13:13,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-11-23 04:13:15,636 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 172 [2022-11-23 04:13:15,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 184 transitions, 1902 flow. Second operand has 18 states, 18 states have (on average 70.0) internal successors, (1260), 18 states have internal predecessors, (1260), 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) [2022-11-23 04:13:15,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:13:15,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 172 [2022-11-23 04:13:15,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:13:19,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 04:13:20,766 INFO L130 PetriNetUnfolder]: 554/1125 cut-off events. [2022-11-23 04:13:20,766 INFO L131 PetriNetUnfolder]: For 6863/6863 co-relation queries the response was YES. [2022-11-23 04:13:20,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5960 conditions, 1125 events. 554/1125 cut-off events. For 6863/6863 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 6747 event pairs, 30 based on Foata normal form. 2/1125 useless extension candidates. Maximal degree in co-relation 5917. Up to 647 conditions per place. [2022-11-23 04:13:20,776 INFO L137 encePairwiseOnDemand]: 163/172 looper letters, 172 selfloop transitions, 97 changer transitions 13/282 dead transitions. [2022-11-23 04:13:20,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 282 transitions, 3329 flow [2022-11-23 04:13:20,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 04:13:20,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-23 04:13:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1401 transitions. [2022-11-23 04:13:20,780 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.428702570379437 [2022-11-23 04:13:20,780 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1401 transitions. [2022-11-23 04:13:20,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1401 transitions. [2022-11-23 04:13:20,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:20,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1401 transitions. [2022-11-23 04:13:20,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 73.73684210526316) internal successors, (1401), 19 states have internal predecessors, (1401), 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) [2022-11-23 04:13:20,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 172.0) internal successors, (3440), 20 states have internal predecessors, (3440), 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) [2022-11-23 04:13:20,788 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 172.0) internal successors, (3440), 20 states have internal predecessors, (3440), 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) [2022-11-23 04:13:20,789 INFO L175 Difference]: Start difference. First operand has 143 places, 184 transitions, 1902 flow. Second operand 19 states and 1401 transitions. [2022-11-23 04:13:20,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 282 transitions, 3329 flow [2022-11-23 04:13:20,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 282 transitions, 3211 flow, removed 45 selfloop flow, removed 5 redundant places. [2022-11-23 04:13:20,855 INFO L231 Difference]: Finished difference. Result has 163 places, 219 transitions, 2621 flow [2022-11-23 04:13:20,855 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1798, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2621, PETRI_PLACES=163, PETRI_TRANSITIONS=219} [2022-11-23 04:13:20,856 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 134 predicate places. [2022-11-23 04:13:20,856 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 219 transitions, 2621 flow [2022-11-23 04:13:20,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.0) internal successors, (1260), 18 states have internal predecessors, (1260), 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) [2022-11-23 04:13:20,857 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:20,857 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:13:20,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 04:13:21,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 04:13:21,062 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:13:21,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:21,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1844102532, now seen corresponding path program 6 times [2022-11-23 04:13:21,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:21,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692750701] [2022-11-23 04:13:21,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:21,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:13:21,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:21,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692750701] [2022-11-23 04:13:21,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692750701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:13:21,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914552479] [2022-11-23 04:13:21,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 04:13:21,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:13:21,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:13:21,665 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:13:21,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 04:13:21,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-23 04:13:21,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:13:21,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 04:13:21,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:13:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:13:21,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:13:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:13:30,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914552479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:13:30,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:13:30,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2022-11-23 04:13:30,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825165147] [2022-11-23 04:13:30,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:13:30,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 04:13:30,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:13:30,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 04:13:30,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-11-23 04:13:32,157 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 172 [2022-11-23 04:13:32,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 219 transitions, 2621 flow. Second operand has 18 states, 18 states have (on average 69.88888888888889) internal successors, (1258), 18 states have internal predecessors, (1258), 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) [2022-11-23 04:13:32,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:13:32,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 172 [2022-11-23 04:13:32,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:13:36,037 INFO L130 PetriNetUnfolder]: 546/1112 cut-off events. [2022-11-23 04:13:36,037 INFO L131 PetriNetUnfolder]: For 8519/8519 co-relation queries the response was YES. [2022-11-23 04:13:36,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6451 conditions, 1112 events. 546/1112 cut-off events. For 8519/8519 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6670 event pairs, 32 based on Foata normal form. 3/1113 useless extension candidates. Maximal degree in co-relation 6402. Up to 647 conditions per place. [2022-11-23 04:13:36,048 INFO L137 encePairwiseOnDemand]: 163/172 looper letters, 174 selfloop transitions, 97 changer transitions 12/283 dead transitions. [2022-11-23 04:13:36,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 283 transitions, 3620 flow [2022-11-23 04:13:36,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 04:13:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-23 04:13:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1545 transitions. [2022-11-23 04:13:36,051 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4277408637873754 [2022-11-23 04:13:36,051 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1545 transitions. [2022-11-23 04:13:36,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1545 transitions. [2022-11-23 04:13:36,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:36,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1545 transitions. [2022-11-23 04:13:36,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 73.57142857142857) internal successors, (1545), 21 states have internal predecessors, (1545), 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) [2022-11-23 04:13:36,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 172.0) internal successors, (3784), 22 states have internal predecessors, (3784), 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) [2022-11-23 04:13:36,060 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 172.0) internal successors, (3784), 22 states have internal predecessors, (3784), 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) [2022-11-23 04:13:36,060 INFO L175 Difference]: Start difference. First operand has 163 places, 219 transitions, 2621 flow. Second operand 21 states and 1545 transitions. [2022-11-23 04:13:36,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 283 transitions, 3620 flow [2022-11-23 04:13:36,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 283 transitions, 3351 flow, removed 113 selfloop flow, removed 9 redundant places. [2022-11-23 04:13:36,155 INFO L231 Difference]: Finished difference. Result has 176 places, 221 transitions, 2671 flow [2022-11-23 04:13:36,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2671, PETRI_PLACES=176, PETRI_TRANSITIONS=221} [2022-11-23 04:13:36,156 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 147 predicate places. [2022-11-23 04:13:36,156 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 221 transitions, 2671 flow [2022-11-23 04:13:36,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 69.88888888888889) internal successors, (1258), 18 states have internal predecessors, (1258), 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) [2022-11-23 04:13:36,156 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:36,157 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:13:36,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 04:13:36,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 04:13:36,362 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 04:13:36,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash -782031644, now seen corresponding path program 7 times [2022-11-23 04:13:36,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:36,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842096013] [2022-11-23 04:13:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:36,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:13:36,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:36,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842096013] [2022-11-23 04:13:36,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842096013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:13:36,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359141114] [2022-11-23 04:13:36,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 04:13:36,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:13:36,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:13:36,927 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:13:36,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c4c8a-e47c-4b4f-9521-277223cfcbdb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 04:13:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:37,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 04:13:37,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:13:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:13:37,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:19:13,007 WARN L233 SmtUtils]: Spent 17.33s on a formula simplification. DAG size of input: 4292 DAG size of output: 4257 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)