./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_83-list2_racing1.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_8a84862a-2140-4a91-a3af-599dff2d4a24/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a84862a-2140-4a91-a3af-599dff2d4a24/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_8a84862a-2140-4a91-a3af-599dff2d4a24/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a84862a-2140-4a91-a3af-599dff2d4a24/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_83-list2_racing1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a84862a-2140-4a91-a3af-599dff2d4a24/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_8a84862a-2140-4a91-a3af-599dff2d4a24/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 23c4aefdda14d4315577cd0030d174ab477745d4b270d2de822290a016a0ff8d --- 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 12:43:43,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:43:43,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:43:43,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:43:43,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:43:43,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:43:43,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:43:43,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:43:43,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:43:43,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:43:43,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:43:43,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:43:43,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:43:43,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:43:43,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:43:43,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:43:43,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:43:43,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:43:43,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:43:43,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:43:43,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:43:43,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:43:43,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:43:43,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:43:43,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:43:43,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:43:43,077 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:43:43,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:43:43,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:43:43,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:43:43,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:43:43,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:43:43,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:43:43,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:43:43,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:43:43,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:43:43,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:43:43,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:43:43,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:43:43,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:43:43,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:43:43,086 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a84862a-2140-4a91-a3af-599dff2d4a24/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 12:43:43,106 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:43:43,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:43:43,107 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:43:43,107 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:43:43,107 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:43:43,108 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:43:43,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:43:43,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:43:43,108 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:43:43,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:43:43,109 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:43:43,109 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 12:43:43,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:43:43,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:43:43,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:43:43,110 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 12:43:43,110 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 12:43:43,110 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 12:43:43,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:43:43,110 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 12:43:43,110 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:43:43,110 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:43:43,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:43:43,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:43:43,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:43:43,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:43:43,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:43:43,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:43:43,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:43:43,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:43:43,112 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:43:43,112 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:43:43,112 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:43:43,112 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:43:43,112 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_8a84862a-2140-4a91-a3af-599dff2d4a24/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a84862a-2140-4a91-a3af-599dff2d4a24/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23c4aefdda14d4315577cd0030d174ab477745d4b270d2de822290a016a0ff8d [2022-12-13 12:43:43,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:43:43,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:43:43,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:43:43,329 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:43:43,329 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:43:43,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a84862a-2140-4a91-a3af-599dff2d4a24/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_83-list2_racing1.i [2022-12-13 12:43:45,891 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:43:46,099 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:43:46,099 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a84862a-2140-4a91-a3af-599dff2d4a24/sv-benchmarks/c/goblint-regression/28-race_reach_83-list2_racing1.i [2022-12-13 12:43:46,109 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a84862a-2140-4a91-a3af-599dff2d4a24/bin/uautomizer-uyxdKDjOR8/data/749c87be6/7831f28c71744fc6ba45f92ffe33a2a9/FLAGf3ee29616 [2022-12-13 12:43:46,469 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a84862a-2140-4a91-a3af-599dff2d4a24/bin/uautomizer-uyxdKDjOR8/data/749c87be6/7831f28c71744fc6ba45f92ffe33a2a9 [2022-12-13 12:43:46,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:43:46,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:43:46,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:43:46,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:43:46,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:43:46,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:43:46" (1/1) ... [2022-12-13 12:43:46,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@468bf5af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:43:46, skipping insertion in model container [2022-12-13 12:43:46,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:43:46" (1/1) ... [2022-12-13 12:43:46,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:43:46,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:43:46,901 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_8a84862a-2140-4a91-a3af-599dff2d4a24/sv-benchmarks/c/goblint-regression/28-race_reach_83-list2_racing1.i[47038,47051] [2022-12-13 12:43:46,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:43:46,953 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:43:46,986 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_8a84862a-2140-4a91-a3af-599dff2d4a24/sv-benchmarks/c/goblint-regression/28-race_reach_83-list2_racing1.i[47038,47051] [2022-12-13 12:43:47,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:43:47,049 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:43:47,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:43:47 WrapperNode [2022-12-13 12:43:47,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:43:47,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:43:47,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:43:47,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:43:47,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:43:47" (1/1) ... [2022-12-13 12:43:47,073 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:43:47" (1/1) ... [2022-12-13 12:43:47,100 INFO L138 Inliner]: procedures = 279, calls = 86, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 339 [2022-12-13 12:43:47,100 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:43:47,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:43:47,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:43:47,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:43:47,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:43:47" (1/1) ... [2022-12-13 12:43:47,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:43:47" (1/1) ... [2022-12-13 12:43:47,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:43:47" (1/1) ... [2022-12-13 12:43:47,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:43:47" (1/1) ... [2022-12-13 12:43:47,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:43:47" (1/1) ... [2022-12-13 12:43:47,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:43:47" (1/1) ... [2022-12-13 12:43:47,129 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:43:47" (1/1) ... [2022-12-13 12:43:47,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:43:47" (1/1) ... [2022-12-13 12:43:47,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:43:47,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:43:47,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:43:47,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:43:47,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:43:47" (1/1) ... [2022-12-13 12:43:47,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:43:47,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a84862a-2140-4a91-a3af-599dff2d4a24/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:43:47,157 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a84862a-2140-4a91-a3af-599dff2d4a24/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:43:47,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a84862a-2140-4a91-a3af-599dff2d4a24/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:43:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 12:43:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 12:43:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-12-13 12:43:47,190 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-12-13 12:43:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 12:43:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 12:43:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-12-13 12:43:47,190 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-12-13 12:43:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 12:43:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 12:43:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 12:43:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 12:43:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 12:43:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure t3_fun [2022-12-13 12:43:47,191 INFO L138 BoogieDeclarations]: Found implementation of procedure t3_fun [2022-12-13 12:43:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 12:43:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:43:47,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:43:47,193 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 12:43:47,318 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:43:47,319 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:43:47,741 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:43:47,750 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:43:47,750 INFO L300 CfgBuilder]: Removed 28 assume(true) statements. [2022-12-13 12:43:47,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:43:47 BoogieIcfgContainer [2022-12-13 12:43:47,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:43:47,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:43:47,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:43:47,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:43:47,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:43:46" (1/3) ... [2022-12-13 12:43:47,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf21977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:43:47, skipping insertion in model container [2022-12-13 12:43:47,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:43:47" (2/3) ... [2022-12-13 12:43:47,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf21977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:43:47, skipping insertion in model container [2022-12-13 12:43:47,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:43:47" (3/3) ... [2022-12-13 12:43:47,758 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_83-list2_racing1.i [2022-12-13 12:43:47,772 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:43:47,772 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2022-12-13 12:43:47,772 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 12:43:47,876 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-12-13 12:43:47,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 387 places, 425 transitions, 892 flow [2022-12-13 12:43:48,323 INFO L130 PetriNetUnfolder]: 164/1302 cut-off events. [2022-12-13 12:43:48,323 INFO L131 PetriNetUnfolder]: For 36/65 co-relation queries the response was YES. [2022-12-13 12:43:48,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1363 conditions, 1302 events. 164/1302 cut-off events. For 36/65 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 9004 event pairs, 0 based on Foata normal form. 0/936 useless extension candidates. Maximal degree in co-relation 673. Up to 16 conditions per place. [2022-12-13 12:43:48,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 387 places, 425 transitions, 892 flow [2022-12-13 12:43:48,361 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 387 places, 425 transitions, 892 flow [2022-12-13 12:43:48,365 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:43:48,375 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 387 places, 425 transitions, 892 flow [2022-12-13 12:43:48,378 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 387 places, 425 transitions, 892 flow [2022-12-13 12:43:48,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 387 places, 425 transitions, 892 flow [2022-12-13 12:43:48,555 INFO L130 PetriNetUnfolder]: 164/1302 cut-off events. [2022-12-13 12:43:48,555 INFO L131 PetriNetUnfolder]: For 36/65 co-relation queries the response was YES. [2022-12-13 12:43:48,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1363 conditions, 1302 events. 164/1302 cut-off events. For 36/65 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 9004 event pairs, 0 based on Foata normal form. 0/936 useless extension candidates. Maximal degree in co-relation 673. Up to 16 conditions per place. [2022-12-13 12:43:48,604 INFO L119 LiptonReduction]: Number of co-enabled transitions 77264 [2022-12-13 12:44:11,033 INFO L134 LiptonReduction]: Checked pairs total: 231888 [2022-12-13 12:44:11,034 INFO L136 LiptonReduction]: Total number of compositions: 377 [2022-12-13 12:44:11,048 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:44:11,054 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;@65c70889, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:44:11,054 INFO L358 AbstractCegarLoop]: Starting to check reachability of 104 error locations. [2022-12-13 12:44:11,055 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 12:44:11,055 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:44:11,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:44:11,056 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 12:44:11,056 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2022-12-13 12:44:11,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:44:11,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1672, now seen corresponding path program 1 times [2022-12-13 12:44:11,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:44:11,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339282494] [2022-12-13 12:44:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:11,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:44:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:44:11,160 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 12:44:11,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:44:11,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339282494] [2022-12-13 12:44:11,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339282494] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:44:11,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:44:11,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 12:44:11,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590741117] [2022-12-13 12:44:11,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:44:11,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 12:44:11,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:44:11,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 12:44:11,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 12:44:11,197 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 381 out of 802 [2022-12-13 12:44:11,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 177 transitions, 396 flow. Second operand has 2 states, 2 states have (on average 381.5) internal successors, (763), 2 states have internal predecessors, (763), 0 states have call successors, (0), 0 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 12:44:11,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:44:11,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 381 of 802 [2022-12-13 12:44:11,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:45:18,104 INFO L130 PetriNetUnfolder]: 725399/1047591 cut-off events. [2022-12-13 12:45:18,104 INFO L131 PetriNetUnfolder]: For 10324/10324 co-relation queries the response was YES. [2022-12-13 12:45:19,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018621 conditions, 1047591 events. 725399/1047591 cut-off events. For 10324/10324 co-relation queries the response was YES. Maximal size of possible extension queue 22289. Compared 9453677 event pairs, 684381 based on Foata normal form. 56808/622821 useless extension candidates. Maximal degree in co-relation 1894570. Up to 965532 conditions per place. [2022-12-13 12:45:23,500 INFO L137 encePairwiseOnDemand]: 771/802 looper letters, 113 selfloop transitions, 0 changer transitions 0/144 dead transitions. [2022-12-13 12:45:23,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 144 transitions, 556 flow [2022-12-13 12:45:23,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 12:45:23,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 12:45:23,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 906 transitions. [2022-12-13 12:45:23,515 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5648379052369077 [2022-12-13 12:45:23,516 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 906 transitions. [2022-12-13 12:45:23,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 906 transitions. [2022-12-13 12:45:23,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:45:23,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 906 transitions. [2022-12-13 12:45:23,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 453.0) internal successors, (906), 2 states have internal predecessors, (906), 0 states have call successors, (0), 0 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 12:45:23,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 802.0) internal successors, (2406), 3 states have internal predecessors, (2406), 0 states have call successors, (0), 0 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 12:45:23,533 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 802.0) internal successors, (2406), 3 states have internal predecessors, (2406), 0 states have call successors, (0), 0 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 12:45:23,535 INFO L175 Difference]: Start difference. First operand has 148 places, 177 transitions, 396 flow. Second operand 2 states and 906 transitions. [2022-12-13 12:45:23,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 144 transitions, 556 flow [2022-12-13 12:45:23,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 144 transitions, 556 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 12:45:23,788 INFO L231 Difference]: Finished difference. Result has 139 places, 144 transitions, 330 flow [2022-12-13 12:45:23,789 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=330, PETRI_PLACES=139, PETRI_TRANSITIONS=144} [2022-12-13 12:45:23,791 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, -9 predicate places. [2022-12-13 12:45:23,791 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 144 transitions, 330 flow [2022-12-13 12:45:23,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 381.5) internal successors, (763), 2 states have internal predecessors, (763), 0 states have call successors, (0), 0 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 12:45:23,792 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:45:23,792 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:45:23,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 12:45:23,792 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2022-12-13 12:45:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:45:23,793 INFO L85 PathProgramCache]: Analyzing trace with hash 53472, now seen corresponding path program 1 times [2022-12-13 12:45:23,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:45:23,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217713402] [2022-12-13 12:45:23,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:45:23,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:45:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:45:23,942 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 12:45:23,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:45:23,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217713402] [2022-12-13 12:45:23,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217713402] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:45:23,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:45:23,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:45:23,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767980734] [2022-12-13 12:45:23,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:45:23,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:45:23,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:45:23,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:45:23,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:45:24,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 371 out of 802 [2022-12-13 12:45:24,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 144 transitions, 330 flow. Second operand has 3 states, 3 states have (on average 371.6666666666667) internal successors, (1115), 3 states have internal predecessors, (1115), 0 states have call successors, (0), 0 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 12:45:24,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:45:24,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 371 of 802 [2022-12-13 12:45:24,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:46:25,803 INFO L130 PetriNetUnfolder]: 689599/987091 cut-off events. [2022-12-13 12:46:25,803 INFO L131 PetriNetUnfolder]: For 10324/10324 co-relation queries the response was YES. [2022-12-13 12:46:27,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1916622 conditions, 987091 events. 689599/987091 cut-off events. For 10324/10324 co-relation queries the response was YES. Maximal size of possible extension queue 21431. Compared 8811398 event pairs, 476279 based on Foata normal form. 0/536227 useless extension candidates. Maximal degree in co-relation 1916616. Up to 675199 conditions per place. [2022-12-13 12:46:30,552 INFO L137 encePairwiseOnDemand]: 798/802 looper letters, 174 selfloop transitions, 2 changer transitions 0/207 dead transitions. [2022-12-13 12:46:30,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 207 transitions, 808 flow [2022-12-13 12:46:30,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:46:30,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:46:30,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1291 transitions. [2022-12-13 12:46:30,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5365752285951787 [2022-12-13 12:46:30,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1291 transitions. [2022-12-13 12:46:30,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1291 transitions. [2022-12-13 12:46:30,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:46:30,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1291 transitions. [2022-12-13 12:46:30,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 430.3333333333333) internal successors, (1291), 3 states have internal predecessors, (1291), 0 states have call successors, (0), 0 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 12:46:30,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 802.0) internal successors, (3208), 4 states have internal predecessors, (3208), 0 states have call successors, (0), 0 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 12:46:30,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 802.0) internal successors, (3208), 4 states have internal predecessors, (3208), 0 states have call successors, (0), 0 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 12:46:30,566 INFO L175 Difference]: Start difference. First operand has 139 places, 144 transitions, 330 flow. Second operand 3 states and 1291 transitions. [2022-12-13 12:46:30,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 207 transitions, 808 flow [2022-12-13 12:46:30,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 207 transitions, 808 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 12:46:30,778 INFO L231 Difference]: Finished difference. Result has 139 places, 142 transitions, 330 flow [2022-12-13 12:46:30,778 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=330, PETRI_PLACES=139, PETRI_TRANSITIONS=142} [2022-12-13 12:46:30,778 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, -9 predicate places. [2022-12-13 12:46:30,778 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 142 transitions, 330 flow [2022-12-13 12:46:30,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 371.6666666666667) internal successors, (1115), 3 states have internal predecessors, (1115), 0 states have call successors, (0), 0 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 12:46:30,779 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:46:30,779 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:46:30,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 12:46:30,779 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2022-12-13 12:46:30,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:46:30,780 INFO L85 PathProgramCache]: Analyzing trace with hash 53474, now seen corresponding path program 1 times [2022-12-13 12:46:30,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:46:30,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046816674] [2022-12-13 12:46:30,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:46:30,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:46:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:46:30,885 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 12:46:30,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:46:30,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046816674] [2022-12-13 12:46:30,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046816674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:46:30,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:46:30,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:46:30,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380267486] [2022-12-13 12:46:30,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:46:30,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:46:30,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:46:30,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:46:30,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:46:30,994 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 373 out of 802 [2022-12-13 12:46:30,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 142 transitions, 330 flow. Second operand has 3 states, 3 states have (on average 373.6666666666667) internal successors, (1121), 3 states have internal predecessors, (1121), 0 states have call successors, (0), 0 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 12:46:30,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:46:30,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 373 of 802 [2022-12-13 12:46:30,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:47:31,001 INFO L130 PetriNetUnfolder]: 686715/985565 cut-off events. [2022-12-13 12:47:31,001 INFO L131 PetriNetUnfolder]: For 20988/20988 co-relation queries the response was YES. [2022-12-13 12:47:32,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1915084 conditions, 985565 events. 686715/985565 cut-off events. For 20988/20988 co-relation queries the response was YES. Maximal size of possible extension queue 20820. Compared 8728308 event pairs, 648478 based on Foata normal form. 0/549238 useless extension candidates. Maximal degree in co-relation 1915077. Up to 913123 conditions per place. [2022-12-13 12:47:35,844 INFO L137 encePairwiseOnDemand]: 797/802 looper letters, 111 selfloop transitions, 3 changer transitions 0/145 dead transitions. [2022-12-13 12:47:35,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 145 transitions, 564 flow [2022-12-13 12:47:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:47:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:47:35,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1235 transitions. [2022-12-13 12:47:35,847 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5133000831255196 [2022-12-13 12:47:35,847 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1235 transitions. [2022-12-13 12:47:35,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1235 transitions. [2022-12-13 12:47:35,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:47:35,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1235 transitions. [2022-12-13 12:47:35,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 411.6666666666667) internal successors, (1235), 3 states have internal predecessors, (1235), 0 states have call successors, (0), 0 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 12:47:35,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 802.0) internal successors, (3208), 4 states have internal predecessors, (3208), 0 states have call successors, (0), 0 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 12:47:35,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 802.0) internal successors, (3208), 4 states have internal predecessors, (3208), 0 states have call successors, (0), 0 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 12:47:35,854 INFO L175 Difference]: Start difference. First operand has 139 places, 142 transitions, 330 flow. Second operand 3 states and 1235 transitions. [2022-12-13 12:47:35,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 145 transitions, 564 flow [2022-12-13 12:47:37,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 145 transitions, 560 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 12:47:37,212 INFO L231 Difference]: Finished difference. Result has 140 places, 144 transitions, 347 flow [2022-12-13 12:47:37,213 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=802, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=140, PETRI_TRANSITIONS=144} [2022-12-13 12:47:37,213 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, -8 predicate places. [2022-12-13 12:47:37,213 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 144 transitions, 347 flow [2022-12-13 12:47:37,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 373.6666666666667) internal successors, (1121), 3 states have internal predecessors, (1121), 0 states have call successors, (0), 0 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 12:47:37,214 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:47:37,214 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 12:47:37,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 12:47:37,214 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2022-12-13 12:47:37,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:37,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1594274354, now seen corresponding path program 1 times [2022-12-13 12:47:37,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:37,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86029721] [2022-12-13 12:47:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:37,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:37,313 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 12:47:37,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:37,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86029721] [2022-12-13 12:47:37,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86029721] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:37,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820557357] [2022-12-13 12:47:37,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:37,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:37,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a84862a-2140-4a91-a3af-599dff2d4a24/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:37,315 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a84862a-2140-4a91-a3af-599dff2d4a24/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:37,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a84862a-2140-4a91-a3af-599dff2d4a24/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 12:47:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:37,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 12:47:37,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:37,477 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 12:47:37,478 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 12:47:37,522 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 12:47:37,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:37,557 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 12:47:37,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820557357] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:37,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:37,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 12:47:37,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129613015] [2022-12-13 12:47:37,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:37,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 12:47:37,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:37,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 12:47:37,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:47:38,010 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 802 [2022-12-13 12:47:38,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 144 transitions, 347 flow. Second operand has 8 states, 8 states have (on average 368.875) internal successors, (2951), 8 states have internal predecessors, (2951), 0 states have call successors, (0), 0 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 12:47:38,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:47:38,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 802 [2022-12-13 12:47:38,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand