./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 17:48:24,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:48:24,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:48:24,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:48:24,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:48:24,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:48:24,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:48:24,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:48:24,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:48:24,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:48:25,000 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:48:25,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:48:25,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:48:25,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:48:25,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:48:25,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:48:25,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:48:25,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:48:25,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:48:25,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:48:25,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:48:25,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:48:25,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:48:25,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:48:25,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:48:25,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:48:25,019 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:48:25,020 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:48:25,020 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:48:25,021 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:48:25,021 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:48:25,022 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:48:25,023 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:48:25,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:48:25,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:48:25,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:48:25,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:48:25,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:48:25,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:48:25,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:48:25,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:48:25,028 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 17:48:25,048 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:48:25,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:48:25,049 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:48:25,049 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:48:25,050 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:48:25,050 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:48:25,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:48:25,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:48:25,051 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:48:25,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:48:25,051 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:48:25,051 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 17:48:25,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:48:25,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:48:25,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:48:25,052 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 17:48:25,052 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 17:48:25,052 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 17:48:25,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:48:25,053 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 17:48:25,053 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:48:25,053 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:48:25,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:48:25,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:48:25,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:48:25,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:48:25,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:48:25,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:48:25,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:48:25,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:48:25,054 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:48:25,054 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:48:25,054 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:48:25,055 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:48:25,055 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_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 [2022-12-13 17:48:25,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:48:25,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:48:25,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:48:25,229 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:48:25,229 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:48:25,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i [2022-12-13 17:48:27,773 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:48:27,982 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:48:27,982 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i [2022-12-13 17:48:27,995 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8/data/9e0be9abd/a581701f703749ad9afebf0d8f00016b/FLAG862564366 [2022-12-13 17:48:28,370 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8/data/9e0be9abd/a581701f703749ad9afebf0d8f00016b [2022-12-13 17:48:28,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:48:28,381 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:48:28,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:48:28,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:48:28,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:48:28,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:48:28" (1/1) ... [2022-12-13 17:48:28,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e5d8d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:48:28, skipping insertion in model container [2022-12-13 17:48:28,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:48:28" (1/1) ... [2022-12-13 17:48:28,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:48:28,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:48:28,712 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_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2022-12-13 17:48:28,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:48:28,743 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:48:28,768 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_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2022-12-13 17:48:28,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:48:28,814 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:48:28,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:48:28 WrapperNode [2022-12-13 17:48:28,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:48:28,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:48:28,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:48:28,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:48:28,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:48:28" (1/1) ... [2022-12-13 17:48:28,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:48:28" (1/1) ... [2022-12-13 17:48:28,852 INFO L138 Inliner]: procedures = 278, calls = 61, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 206 [2022-12-13 17:48:28,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:48:28,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:48:28,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:48:28,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:48:28,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:48:28" (1/1) ... [2022-12-13 17:48:28,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:48:28" (1/1) ... [2022-12-13 17:48:28,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:48:28" (1/1) ... [2022-12-13 17:48:28,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:48:28" (1/1) ... [2022-12-13 17:48:28,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:48:28" (1/1) ... [2022-12-13 17:48:28,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:48:28" (1/1) ... [2022-12-13 17:48:28,874 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:48:28" (1/1) ... [2022-12-13 17:48:28,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:48:28" (1/1) ... [2022-12-13 17:48:28,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:48:28,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:48:28,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:48:28,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:48:28,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:48:28" (1/1) ... [2022-12-13 17:48:28,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:48:28,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:48:28,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:48:28,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:48:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:48:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 17:48:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-12-13 17:48:28,934 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-12-13 17:48:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:48:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:48:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-12-13 17:48:28,934 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-12-13 17:48:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:48:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 17:48:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 17:48:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:48:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 17:48:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:48:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:48:28,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:48:28,937 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 17:48:29,040 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:48:29,041 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:48:29,387 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:48:29,396 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:48:29,396 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-12-13 17:48:29,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:48:29 BoogieIcfgContainer [2022-12-13 17:48:29,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:48:29,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:48:29,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:48:29,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:48:29,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:48:28" (1/3) ... [2022-12-13 17:48:29,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c2c829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:48:29, skipping insertion in model container [2022-12-13 17:48:29,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:48:28" (2/3) ... [2022-12-13 17:48:29,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c2c829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:48:29, skipping insertion in model container [2022-12-13 17:48:29,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:48:29" (3/3) ... [2022-12-13 17:48:29,409 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2022-12-13 17:48:29,425 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:48:29,425 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-12-13 17:48:29,425 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:48:29,519 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 17:48:29,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 261 transitions, 544 flow [2022-12-13 17:48:29,658 INFO L130 PetriNetUnfolder]: 52/501 cut-off events. [2022-12-13 17:48:29,659 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-12-13 17:48:29,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 501 events. 52/501 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2292 event pairs, 0 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 253. Up to 8 conditions per place. [2022-12-13 17:48:29,666 INFO L82 GeneralOperation]: Start removeDead. Operand has 243 places, 261 transitions, 544 flow [2022-12-13 17:48:29,672 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 243 places, 261 transitions, 544 flow [2022-12-13 17:48:29,675 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:48:29,683 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 243 places, 261 transitions, 544 flow [2022-12-13 17:48:29,685 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 243 places, 261 transitions, 544 flow [2022-12-13 17:48:29,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 261 transitions, 544 flow [2022-12-13 17:48:29,790 INFO L130 PetriNetUnfolder]: 52/501 cut-off events. [2022-12-13 17:48:29,791 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-12-13 17:48:29,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 501 events. 52/501 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2292 event pairs, 0 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 253. Up to 8 conditions per place. [2022-12-13 17:48:29,809 INFO L119 LiptonReduction]: Number of co-enabled transitions 22772 [2022-12-13 17:48:37,585 INFO L134 LiptonReduction]: Checked pairs total: 63875 [2022-12-13 17:48:37,585 INFO L136 LiptonReduction]: Total number of compositions: 226 [2022-12-13 17:48:37,595 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:48:37,600 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;@3e0b3c27, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:48:37,600 INFO L358 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2022-12-13 17:48:37,601 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 17:48:37,601 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:48:37,601 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:48:37,601 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 17:48:37,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 17:48:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:37,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1014, now seen corresponding path program 1 times [2022-12-13 17:48:37,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:37,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407540789] [2022-12-13 17:48:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:37,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:37,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:37,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407540789] [2022-12-13 17:48:37,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407540789] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:48:37,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:48:37,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 17:48:37,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808338788] [2022-12-13 17:48:37,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:48:37,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 17:48:37,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:37,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 17:48:37,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 17:48:37,716 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 487 [2022-12-13 17:48:37,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 105 transitions, 232 flow. Second operand has 2 states, 2 states have (on average 238.5) internal successors, (477), 2 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:37,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:48:37,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 487 [2022-12-13 17:48:37,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:48:39,385 INFO L130 PetriNetUnfolder]: 12680/22065 cut-off events. [2022-12-13 17:48:39,385 INFO L131 PetriNetUnfolder]: For 172/172 co-relation queries the response was YES. [2022-12-13 17:48:39,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41648 conditions, 22065 events. 12680/22065 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 174300 event pairs, 12082 based on Foata normal form. 771/12012 useless extension candidates. Maximal degree in co-relation 39297. Up to 19450 conditions per place. [2022-12-13 17:48:39,481 INFO L137 encePairwiseOnDemand]: 472/487 looper letters, 69 selfloop transitions, 0 changer transitions 0/89 dead transitions. [2022-12-13 17:48:39,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 89 transitions, 338 flow [2022-12-13 17:48:39,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 17:48:39,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 17:48:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 560 transitions. [2022-12-13 17:48:39,494 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5749486652977412 [2022-12-13 17:48:39,495 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 560 transitions. [2022-12-13 17:48:39,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 560 transitions. [2022-12-13 17:48:39,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:48:39,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 560 transitions. [2022-12-13 17:48:39,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 280.0) internal successors, (560), 2 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:39,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 487.0) internal successors, (1461), 3 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:39,513 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 487.0) internal successors, (1461), 3 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:39,514 INFO L175 Difference]: Start difference. First operand has 93 places, 105 transitions, 232 flow. Second operand 2 states and 560 transitions. [2022-12-13 17:48:39,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 89 transitions, 338 flow [2022-12-13 17:48:39,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:48:39,524 INFO L231 Difference]: Finished difference. Result has 89 places, 89 transitions, 200 flow [2022-12-13 17:48:39,526 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=487, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=200, PETRI_PLACES=89, PETRI_TRANSITIONS=89} [2022-12-13 17:48:39,530 INFO L288 CegarLoopForPetriNet]: 93 programPoint places, -4 predicate places. [2022-12-13 17:48:39,530 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 89 transitions, 200 flow [2022-12-13 17:48:39,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 238.5) internal successors, (477), 2 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:39,531 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:48:39,531 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:48:39,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:48:39,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 17:48:39,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:39,532 INFO L85 PathProgramCache]: Analyzing trace with hash 32474, now seen corresponding path program 1 times [2022-12-13 17:48:39,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:39,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22102643] [2022-12-13 17:48:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:39,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:39,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:39,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22102643] [2022-12-13 17:48:39,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22102643] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:48:39,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:48:39,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:48:39,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86039406] [2022-12-13 17:48:39,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:48:39,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:48:39,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:39,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:48:39,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:48:39,789 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 487 [2022-12-13 17:48:39,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 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) [2022-12-13 17:48:39,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:48:39,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 487 [2022-12-13 17:48:39,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:48:41,171 INFO L130 PetriNetUnfolder]: 12543/21458 cut-off events. [2022-12-13 17:48:41,171 INFO L131 PetriNetUnfolder]: For 188/188 co-relation queries the response was YES. [2022-12-13 17:48:41,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40784 conditions, 21458 events. 12543/21458 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 165129 event pairs, 11518 based on Foata normal form. 0/10985 useless extension candidates. Maximal degree in co-relation 40779. Up to 19179 conditions per place. [2022-12-13 17:48:41,231 INFO L137 encePairwiseOnDemand]: 482/487 looper letters, 70 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2022-12-13 17:48:41,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 93 transitions, 354 flow [2022-12-13 17:48:41,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:48:41,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:48:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 765 transitions. [2022-12-13 17:48:41,235 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5236139630390144 [2022-12-13 17:48:41,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 765 transitions. [2022-12-13 17:48:41,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 765 transitions. [2022-12-13 17:48:41,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:48:41,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 765 transitions. [2022-12-13 17:48:41,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:41,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 487.0) internal successors, (1948), 4 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:41,240 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 487.0) internal successors, (1948), 4 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:41,240 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 200 flow. Second operand 3 states and 765 transitions. [2022-12-13 17:48:41,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 93 transitions, 354 flow [2022-12-13 17:48:41,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:48:41,244 INFO L231 Difference]: Finished difference. Result has 92 places, 91 transitions, 221 flow [2022-12-13 17:48:41,244 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=487, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=92, PETRI_TRANSITIONS=91} [2022-12-13 17:48:41,245 INFO L288 CegarLoopForPetriNet]: 93 programPoint places, -1 predicate places. [2022-12-13 17:48:41,245 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 91 transitions, 221 flow [2022-12-13 17:48:41,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 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) [2022-12-13 17:48:41,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:48:41,245 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:48:41,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:48:41,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 17:48:41,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:41,246 INFO L85 PathProgramCache]: Analyzing trace with hash 32473, now seen corresponding path program 1 times [2022-12-13 17:48:41,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:41,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91455403] [2022-12-13 17:48:41,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:41,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:41,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:41,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91455403] [2022-12-13 17:48:41,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91455403] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:48:41,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:48:41,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:48:41,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836779726] [2022-12-13 17:48:41,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:48:41,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:48:41,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:41,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:48:41,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:48:41,373 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 487 [2022-12-13 17:48:41,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 91 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:41,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:48:41,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 487 [2022-12-13 17:48:41,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:48:42,782 INFO L130 PetriNetUnfolder]: 12455/20764 cut-off events. [2022-12-13 17:48:42,782 INFO L131 PetriNetUnfolder]: For 669/669 co-relation queries the response was YES. [2022-12-13 17:48:42,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40573 conditions, 20764 events. 12455/20764 cut-off events. For 669/669 co-relation queries the response was YES. Maximal size of possible extension queue 767. Compared 155120 event pairs, 8011 based on Foata normal form. 0/10986 useless extension candidates. Maximal degree in co-relation 40566. Up to 13424 conditions per place. [2022-12-13 17:48:42,843 INFO L137 encePairwiseOnDemand]: 483/487 looper letters, 107 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2022-12-13 17:48:42,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 128 transitions, 515 flow [2022-12-13 17:48:42,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:48:42,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:48:42,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 796 transitions. [2022-12-13 17:48:42,845 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5448323066392882 [2022-12-13 17:48:42,846 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 796 transitions. [2022-12-13 17:48:42,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 796 transitions. [2022-12-13 17:48:42,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:48:42,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 796 transitions. [2022-12-13 17:48:42,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:42,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 487.0) internal successors, (1948), 4 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:42,849 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 487.0) internal successors, (1948), 4 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:42,849 INFO L175 Difference]: Start difference. First operand has 92 places, 91 transitions, 221 flow. Second operand 3 states and 796 transitions. [2022-12-13 17:48:42,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 128 transitions, 515 flow [2022-12-13 17:48:42,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 128 transitions, 512 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:48:42,852 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 218 flow [2022-12-13 17:48:42,852 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=487, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2022-12-13 17:48:42,852 INFO L288 CegarLoopForPetriNet]: 93 programPoint places, -2 predicate places. [2022-12-13 17:48:42,852 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 218 flow [2022-12-13 17:48:42,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:42,853 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:48:42,853 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:48:42,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:48:42,853 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 17:48:42,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:42,853 INFO L85 PathProgramCache]: Analyzing trace with hash 968220741, now seen corresponding path program 1 times [2022-12-13 17:48:42,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:42,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718985228] [2022-12-13 17:48:42,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:42,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:43,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:43,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718985228] [2022-12-13 17:48:43,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718985228] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:48:43,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:48:43,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:48:43,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028551760] [2022-12-13 17:48:43,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:48:43,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:48:43,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:43,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:48:43,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:48:43,106 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 487 [2022-12-13 17:48:43,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:43,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:48:43,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 487 [2022-12-13 17:48:43,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:48:45,582 INFO L130 PetriNetUnfolder]: 21809/37472 cut-off events. [2022-12-13 17:48:45,582 INFO L131 PetriNetUnfolder]: For 1489/1489 co-relation queries the response was YES. [2022-12-13 17:48:45,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72341 conditions, 37472 events. 21809/37472 cut-off events. For 1489/1489 co-relation queries the response was YES. Maximal size of possible extension queue 1512. Compared 323049 event pairs, 9224 based on Foata normal form. 0/20041 useless extension candidates. Maximal degree in co-relation 72334. Up to 17484 conditions per place. [2022-12-13 17:48:45,709 INFO L137 encePairwiseOnDemand]: 484/487 looper letters, 128 selfloop transitions, 3 changer transitions 0/151 dead transitions. [2022-12-13 17:48:45,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 151 transitions, 625 flow [2022-12-13 17:48:45,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:48:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:48:45,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 836 transitions. [2022-12-13 17:48:45,711 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5722108145106092 [2022-12-13 17:48:45,711 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 836 transitions. [2022-12-13 17:48:45,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 836 transitions. [2022-12-13 17:48:45,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:48:45,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 836 transitions. [2022-12-13 17:48:45,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:45,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 487.0) internal successors, (1948), 4 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:45,715 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 487.0) internal successors, (1948), 4 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:45,715 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 218 flow. Second operand 3 states and 836 transitions. [2022-12-13 17:48:45,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 151 transitions, 625 flow [2022-12-13 17:48:45,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 151 transitions, 619 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:48:45,729 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 231 flow [2022-12-13 17:48:45,729 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=487, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=231, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2022-12-13 17:48:45,729 INFO L288 CegarLoopForPetriNet]: 93 programPoint places, -1 predicate places. [2022-12-13 17:48:45,730 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 231 flow [2022-12-13 17:48:45,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:45,730 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:48:45,730 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:48:45,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:48:45,730 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 17:48:45,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:45,731 INFO L85 PathProgramCache]: Analyzing trace with hash 968220740, now seen corresponding path program 1 times [2022-12-13 17:48:45,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:45,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262986699] [2022-12-13 17:48:45,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:45,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:45,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:45,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262986699] [2022-12-13 17:48:45,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262986699] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:48:45,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:48:45,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:48:45,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455871207] [2022-12-13 17:48:45,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:48:45,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:48:45,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:45,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:48:45,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:48:45,880 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 487 [2022-12-13 17:48:45,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 231 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:45,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:48:45,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 487 [2022-12-13 17:48:45,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:48:48,848 INFO L130 PetriNetUnfolder]: 26738/46764 cut-off events. [2022-12-13 17:48:48,849 INFO L131 PetriNetUnfolder]: For 3635/3635 co-relation queries the response was YES. [2022-12-13 17:48:48,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89587 conditions, 46764 events. 26738/46764 cut-off events. For 3635/3635 co-relation queries the response was YES. Maximal size of possible extension queue 1767. Compared 419541 event pairs, 13024 based on Foata normal form. 0/26158 useless extension candidates. Maximal degree in co-relation 89579. Up to 29750 conditions per place. [2022-12-13 17:48:49,036 INFO L137 encePairwiseOnDemand]: 482/487 looper letters, 126 selfloop transitions, 5 changer transitions 0/150 dead transitions. [2022-12-13 17:48:49,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 150 transitions, 626 flow [2022-12-13 17:48:49,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:48:49,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:48:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 836 transitions. [2022-12-13 17:48:49,039 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5722108145106092 [2022-12-13 17:48:49,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 836 transitions. [2022-12-13 17:48:49,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 836 transitions. [2022-12-13 17:48:49,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:48:49,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 836 transitions. [2022-12-13 17:48:49,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:49,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 487.0) internal successors, (1948), 4 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:49,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 487.0) internal successors, (1948), 4 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:49,044 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 231 flow. Second operand 3 states and 836 transitions. [2022-12-13 17:48:49,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 150 transitions, 626 flow [2022-12-13 17:48:49,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 150 transitions, 623 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:48:49,048 INFO L231 Difference]: Finished difference. Result has 95 places, 93 transitions, 262 flow [2022-12-13 17:48:49,048 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=487, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=95, PETRI_TRANSITIONS=93} [2022-12-13 17:48:49,049 INFO L288 CegarLoopForPetriNet]: 93 programPoint places, 2 predicate places. [2022-12-13 17:48:49,049 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 93 transitions, 262 flow [2022-12-13 17:48:49,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:49,049 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:48:49,049 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:48:49,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:48:49,050 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 17:48:49,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:49,050 INFO L85 PathProgramCache]: Analyzing trace with hash 968220506, now seen corresponding path program 1 times [2022-12-13 17:48:49,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:49,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140412016] [2022-12-13 17:48:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:49,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:49,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:49,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140412016] [2022-12-13 17:48:49,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140412016] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:48:49,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776378344] [2022-12-13 17:48:49,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:49,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:49,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:48:49,139 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:48:49,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:48:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:49,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:48:49,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:48:49,270 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:48:49,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 17:48:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:49,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:48:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:49,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776378344] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:48:49,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:48:49,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 17:48:49,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977470190] [2022-12-13 17:48:49,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:48:49,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:48:49,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:49,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:48:49,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:48:49,761 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 487 [2022-12-13 17:48:49,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 93 transitions, 262 flow. Second operand has 8 states, 8 states have (on average 227.875) internal successors, (1823), 8 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:49,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:48:49,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 487 [2022-12-13 17:48:49,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:48:51,908 INFO L130 PetriNetUnfolder]: 12869/21920 cut-off events. [2022-12-13 17:48:51,908 INFO L131 PetriNetUnfolder]: For 2445/2445 co-relation queries the response was YES. [2022-12-13 17:48:51,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43722 conditions, 21920 events. 12869/21920 cut-off events. For 2445/2445 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 169302 event pairs, 7570 based on Foata normal form. 13/12629 useless extension candidates. Maximal degree in co-relation 43713. Up to 19613 conditions per place. [2022-12-13 17:48:51,975 INFO L137 encePairwiseOnDemand]: 482/487 looper letters, 85 selfloop transitions, 6 changer transitions 0/112 dead transitions. [2022-12-13 17:48:51,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 112 transitions, 478 flow [2022-12-13 17:48:51,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:48:51,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:48:51,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1449 transitions. [2022-12-13 17:48:51,977 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49589322381930184 [2022-12-13 17:48:51,977 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1449 transitions. [2022-12-13 17:48:51,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1449 transitions. [2022-12-13 17:48:51,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:48:51,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1449 transitions. [2022-12-13 17:48:51,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 241.5) internal successors, (1449), 6 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:51,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 487.0) internal successors, (3409), 7 states have internal predecessors, (3409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:51,983 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 487.0) internal successors, (3409), 7 states have internal predecessors, (3409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:51,983 INFO L175 Difference]: Start difference. First operand has 95 places, 93 transitions, 262 flow. Second operand 6 states and 1449 transitions. [2022-12-13 17:48:51,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 112 transitions, 478 flow [2022-12-13 17:48:51,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 112 transitions, 468 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:48:51,989 INFO L231 Difference]: Finished difference. Result has 97 places, 90 transitions, 250 flow [2022-12-13 17:48:51,989 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=487, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=250, PETRI_PLACES=97, PETRI_TRANSITIONS=90} [2022-12-13 17:48:51,989 INFO L288 CegarLoopForPetriNet]: 93 programPoint places, 4 predicate places. [2022-12-13 17:48:51,989 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 90 transitions, 250 flow [2022-12-13 17:48:51,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 227.875) internal successors, (1823), 8 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:51,990 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:48:51,990 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:48:51,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:48:52,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53423011-bb7a-4b8b-ba7c-bfedc1adc1a6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 17:48:52,192 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 17:48:52,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:52,193 INFO L85 PathProgramCache]: Analyzing trace with hash -49927434, now seen corresponding path program 1 times [2022-12-13 17:48:52,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:52,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006752992] [2022-12-13 17:48:52,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:52,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:52,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:52,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006752992] [2022-12-13 17:48:52,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006752992] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:48:52,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:48:52,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:48:52,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561019167] [2022-12-13 17:48:52,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:48:52,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:48:52,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:52,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:48:52,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:48:52,325 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 487 [2022-12-13 17:48:52,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 90 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:52,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:48:52,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 487 [2022-12-13 17:48:52,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:48:53,922 INFO L130 PetriNetUnfolder]: 15508/27153 cut-off events. [2022-12-13 17:48:53,922 INFO L131 PetriNetUnfolder]: For 2332/2332 co-relation queries the response was YES. [2022-12-13 17:48:53,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53673 conditions, 27153 events. 15508/27153 cut-off events. For 2332/2332 co-relation queries the response was YES. Maximal size of possible extension queue 1109. Compared 230903 event pairs, 4900 based on Foata normal form. 0/15535 useless extension candidates. Maximal degree in co-relation 53664. Up to 16520 conditions per place. [2022-12-13 17:48:54,029 INFO L137 encePairwiseOnDemand]: 482/487 looper letters, 125 selfloop transitions, 6 changer transitions 0/149 dead transitions. [2022-12-13 17:48:54,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 149 transitions, 653 flow [2022-12-13 17:48:54,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:48:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:48:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 818 transitions. [2022-12-13 17:48:54,031 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5598904859685148 [2022-12-13 17:48:54,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 818 transitions. [2022-12-13 17:48:54,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 818 transitions. [2022-12-13 17:48:54,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:48:54,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 818 transitions. [2022-12-13 17:48:54,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:54,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 487.0) internal successors, (1948), 4 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:54,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 487.0) internal successors, (1948), 4 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:54,034 INFO L175 Difference]: Start difference. First operand has 97 places, 90 transitions, 250 flow. Second operand 3 states and 818 transitions. [2022-12-13 17:48:54,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 149 transitions, 653 flow [2022-12-13 17:48:54,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 149 transitions, 630 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-12-13 17:48:54,037 INFO L231 Difference]: Finished difference. Result has 97 places, 93 transitions, 275 flow [2022-12-13 17:48:54,037 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=487, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=275, PETRI_PLACES=97, PETRI_TRANSITIONS=93} [2022-12-13 17:48:54,038 INFO L288 CegarLoopForPetriNet]: 93 programPoint places, 4 predicate places. [2022-12-13 17:48:54,038 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 93 transitions, 275 flow [2022-12-13 17:48:54,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:54,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:48:54,038 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 17:48:54,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 17:48:54,039 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 17:48:54,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:54,039 INFO L85 PathProgramCache]: Analyzing trace with hash -49934599, now seen corresponding path program 1 times [2022-12-13 17:48:54,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:54,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338186688] [2022-12-13 17:48:54,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:54,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:48:54,052 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:48:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:48:54,078 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:48:54,078 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:48:54,079 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (64 of 65 remaining) [2022-12-13 17:48:54,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 65 remaining) [2022-12-13 17:48:54,081 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 65 remaining) [2022-12-13 17:48:54,081 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 65 remaining) [2022-12-13 17:48:54,081 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 65 remaining) [2022-12-13 17:48:54,081 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 65 remaining) [2022-12-13 17:48:54,081 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 65 remaining) [2022-12-13 17:48:54,082 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 65 remaining) [2022-12-13 17:48:54,082 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 65 remaining) [2022-12-13 17:48:54,082 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 65 remaining) [2022-12-13 17:48:54,082 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 65 remaining) [2022-12-13 17:48:54,082 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 65 remaining) [2022-12-13 17:48:54,082 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 65 remaining) [2022-12-13 17:48:54,082 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 65 remaining) [2022-12-13 17:48:54,082 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 65 remaining) [2022-12-13 17:48:54,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr14ASSERT_VIOLATIONMEMORY_LEAK (49 of 65 remaining) [2022-12-13 17:48:54,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 65 remaining) [2022-12-13 17:48:54,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 65 remaining) [2022-12-13 17:48:54,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 65 remaining) [2022-12-13 17:48:54,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 65 remaining) [2022-12-13 17:48:54,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 65 remaining) [2022-12-13 17:48:54,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 65 remaining) [2022-12-13 17:48:54,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 65 remaining) [2022-12-13 17:48:54,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 65 remaining) [2022-12-13 17:48:54,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 65 remaining) [2022-12-13 17:48:54,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 65 remaining) [2022-12-13 17:48:54,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 65 remaining) [2022-12-13 17:48:54,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 65 remaining) [2022-12-13 17:48:54,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (36 of 65 remaining) [2022-12-13 17:48:54,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (35 of 65 remaining) [2022-12-13 17:48:54,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 65 remaining) [2022-12-13 17:48:54,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 65 remaining) [2022-12-13 17:48:54,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 65 remaining) [2022-12-13 17:48:54,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 65 remaining) [2022-12-13 17:48:54,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 65 remaining) [2022-12-13 17:48:54,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 65 remaining) [2022-12-13 17:48:54,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 65 remaining) [2022-12-13 17:48:54,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 65 remaining) [2022-12-13 17:48:54,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 65 remaining) [2022-12-13 17:48:54,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 65 remaining) [2022-12-13 17:48:54,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 65 remaining) [2022-12-13 17:48:54,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 65 remaining) [2022-12-13 17:48:54,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 65 remaining) [2022-12-13 17:48:54,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 65 remaining) [2022-12-13 17:48:54,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 65 remaining) [2022-12-13 17:48:54,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 65 remaining) [2022-12-13 17:48:54,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 65 remaining) [2022-12-13 17:48:54,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 65 remaining) [2022-12-13 17:48:54,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 65 remaining) [2022-12-13 17:48:54,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 65 remaining) [2022-12-13 17:48:54,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 65 remaining) [2022-12-13 17:48:54,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 65 remaining) [2022-12-13 17:48:54,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 65 remaining) [2022-12-13 17:48:54,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 65 remaining) [2022-12-13 17:48:54,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr14ASSERT_VIOLATIONMEMORY_LEAK (10 of 65 remaining) [2022-12-13 17:48:54,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 65 remaining) [2022-12-13 17:48:54,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 65 remaining) [2022-12-13 17:48:54,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 65 remaining) [2022-12-13 17:48:54,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 65 remaining) [2022-12-13 17:48:54,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 65 remaining) [2022-12-13 17:48:54,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 65 remaining) [2022-12-13 17:48:54,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 65 remaining) [2022-12-13 17:48:54,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 65 remaining) [2022-12-13 17:48:54,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 65 remaining) [2022-12-13 17:48:54,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 65 remaining) [2022-12-13 17:48:54,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 17:48:54,090 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:48:54,092 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:48:54,093 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 17:48:54,148 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-12-13 17:48:54,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 375 places, 408 transitions, 864 flow [2022-12-13 17:48:54,384 INFO L130 PetriNetUnfolder]: 191/1480 cut-off events. [2022-12-13 17:48:54,384 INFO L131 PetriNetUnfolder]: For 72/118 co-relation queries the response was YES. [2022-12-13 17:48:54,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1577 conditions, 1480 events. 191/1480 cut-off events. For 72/118 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 10075 event pairs, 2 based on Foata normal form. 0/1072 useless extension candidates. Maximal degree in co-relation 922. Up to 32 conditions per place. [2022-12-13 17:48:54,402 INFO L82 GeneralOperation]: Start removeDead. Operand has 375 places, 408 transitions, 864 flow [2022-12-13 17:48:54,416 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 375 places, 408 transitions, 864 flow [2022-12-13 17:48:54,416 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:48:54,416 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 375 places, 408 transitions, 864 flow [2022-12-13 17:48:54,416 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 375 places, 408 transitions, 864 flow [2022-12-13 17:48:54,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 375 places, 408 transitions, 864 flow [2022-12-13 17:48:54,607 INFO L130 PetriNetUnfolder]: 191/1480 cut-off events. [2022-12-13 17:48:54,607 INFO L131 PetriNetUnfolder]: For 72/118 co-relation queries the response was YES. [2022-12-13 17:48:54,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1577 conditions, 1480 events. 191/1480 cut-off events. For 72/118 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 10075 event pairs, 2 based on Foata normal form. 0/1072 useless extension candidates. Maximal degree in co-relation 922. Up to 32 conditions per place. [2022-12-13 17:48:54,680 INFO L119 LiptonReduction]: Number of co-enabled transitions 87992 [2022-12-13 17:49:04,163 INFO L134 LiptonReduction]: Checked pairs total: 298511 [2022-12-13 17:49:04,163 INFO L136 LiptonReduction]: Total number of compositions: 344 [2022-12-13 17:49:04,165 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:49:04,165 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;@3e0b3c27, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:49:04,165 INFO L358 AbstractCegarLoop]: Starting to check reachability of 90 error locations. [2022-12-13 17:49:04,165 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 17:49:04,165 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:49:04,165 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:49:04,165 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 17:49:04,166 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2022-12-13 17:49:04,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:04,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1910, now seen corresponding path program 1 times [2022-12-13 17:49:04,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:04,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773322997] [2022-12-13 17:49:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:04,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:04,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:04,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773322997] [2022-12-13 17:49:04,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773322997] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:49:04,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:49:04,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 17:49:04,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559589764] [2022-12-13 17:49:04,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:49:04,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 17:49:04,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:04,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 17:49:04,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 17:49:04,171 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 752 [2022-12-13 17:49:04,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 181 transitions, 410 flow. Second operand has 2 states, 2 states have (on average 366.5) internal successors, (733), 2 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:04,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:49:04,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 752 [2022-12-13 17:49:04,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand