./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 16:58:36,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:58:36,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:58:36,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:58:36,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:58:36,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:58:36,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:58:36,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:58:36,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:58:36,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:58:36,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:58:36,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:58:36,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:58:36,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:58:36,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:58:36,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:58:36,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:58:36,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:58:36,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:58:36,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:58:36,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:58:36,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:58:36,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:58:36,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:58:36,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:58:36,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:58:36,418 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:58:36,420 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:58:36,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:58:36,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:58:36,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:58:36,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:58:36,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:58:36,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:58:36,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:58:36,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:58:36,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:58:36,429 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:58:36,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:58:36,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:58:36,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:58:36,437 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 16:58:36,474 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:58:36,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:58:36,480 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:58:36,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:58:36,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:58:36,482 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:58:36,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:58:36,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:58:36,484 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:58:36,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:58:36,486 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:58:36,486 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 16:58:36,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:58:36,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:58:36,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:58:36,487 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 16:58:36,488 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 16:58:36,488 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 16:58:36,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:58:36,489 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 16:58:36,489 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:58:36,489 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:58:36,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:58:36,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:58:36,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:58:36,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:58:36,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:58:36,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:58:36,492 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:58:36,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:58:36,492 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:58:36,493 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:58:36,493 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:58:36,493 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_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 [2022-11-25 16:58:36,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:58:36,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:58:36,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:58:36,935 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:58:36,935 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:58:36,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2022-11-25 16:58:40,104 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:58:40,456 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:58:40,456 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2022-11-25 16:58:40,473 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/data/78df4bf81/13627fdc93bf4af5b7c335fa9bc83d91/FLAG079f4bf60 [2022-11-25 16:58:40,497 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/data/78df4bf81/13627fdc93bf4af5b7c335fa9bc83d91 [2022-11-25 16:58:40,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:58:40,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:58:40,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:58:40,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:58:40,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:58:40,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:58:40" (1/1) ... [2022-11-25 16:58:40,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c2700f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:40, skipping insertion in model container [2022-11-25 16:58:40,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:58:40" (1/1) ... [2022-11-25 16:58:40,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:58:40,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:58:40,964 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_872d0d51-7508-40dd-b2dc-f92d5f21fd63/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i[30212,30225] [2022-11-25 16:58:40,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:58:41,010 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:58:41,047 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_872d0d51-7508-40dd-b2dc-f92d5f21fd63/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i[30212,30225] [2022-11-25 16:58:41,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:58:41,095 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:58:41,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:41 WrapperNode [2022-11-25 16:58:41,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:58:41,097 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:58:41,097 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:58:41,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:58:41,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:41" (1/1) ... [2022-11-25 16:58:41,145 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:41" (1/1) ... [2022-11-25 16:58:41,188 INFO L138 Inliner]: procedures = 173, calls = 39, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2022-11-25 16:58:41,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:58:41,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:58:41,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:58:41,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:58:41,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:41" (1/1) ... [2022-11-25 16:58:41,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:41" (1/1) ... [2022-11-25 16:58:41,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:41" (1/1) ... [2022-11-25 16:58:41,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:41" (1/1) ... [2022-11-25 16:58:41,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:41" (1/1) ... [2022-11-25 16:58:41,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:41" (1/1) ... [2022-11-25 16:58:41,245 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:41" (1/1) ... [2022-11-25 16:58:41,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:41" (1/1) ... [2022-11-25 16:58:41,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:58:41,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:58:41,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:58:41,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:58:41,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:41" (1/1) ... [2022-11-25 16:58:41,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:58:41,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:58:41,313 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:58:41,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:58:41,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 16:58:41,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:58:41,368 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 16:58:41,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:58:41,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:58:41,369 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 16:58:41,369 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 16:58:41,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:58:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:58:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:58:41,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:58:41,375 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 16:58:41,570 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:58:41,573 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:58:41,952 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:58:41,964 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:58:41,964 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-25 16:58:41,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:58:41 BoogieIcfgContainer [2022-11-25 16:58:41,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:58:41,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:58:41,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:58:41,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:58:41,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:58:40" (1/3) ... [2022-11-25 16:58:41,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422cc3ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:58:41, skipping insertion in model container [2022-11-25 16:58:41,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:41" (2/3) ... [2022-11-25 16:58:41,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422cc3ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:58:41, skipping insertion in model container [2022-11-25 16:58:41,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:58:41" (3/3) ... [2022-11-25 16:58:41,987 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2022-11-25 16:58:42,009 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:58:42,010 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-25 16:58:42,010 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 16:58:42,098 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-25 16:58:42,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 154 transitions, 316 flow [2022-11-25 16:58:42,239 INFO L130 PetriNetUnfolder]: 26/237 cut-off events. [2022-11-25 16:58:42,239 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 16:58:42,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 237 events. 26/237 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 671 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 120. Up to 6 conditions per place. [2022-11-25 16:58:42,247 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 154 transitions, 316 flow [2022-11-25 16:58:42,254 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 154 transitions, 316 flow [2022-11-25 16:58:42,258 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:58:42,275 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 154 transitions, 316 flow [2022-11-25 16:58:42,278 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 154 transitions, 316 flow [2022-11-25 16:58:42,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 154 transitions, 316 flow [2022-11-25 16:58:42,339 INFO L130 PetriNetUnfolder]: 26/237 cut-off events. [2022-11-25 16:58:42,339 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 16:58:42,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 237 events. 26/237 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 671 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 120. Up to 6 conditions per place. [2022-11-25 16:58:42,344 INFO L119 LiptonReduction]: Number of co-enabled transitions 3916 [2022-11-25 16:58:48,001 INFO L134 LiptonReduction]: Checked pairs total: 5489 [2022-11-25 16:58:48,001 INFO L136 LiptonReduction]: Total number of compositions: 148 [2022-11-25 16:58:48,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:58:48,048 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;@537799e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:58:48,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-25 16:58:48,051 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 16:58:48,051 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:58:48,052 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:48,053 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 16:58:48,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 16:58:48,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:48,064 INFO L85 PathProgramCache]: Analyzing trace with hash 18413, now seen corresponding path program 1 times [2022-11-25 16:58:48,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:48,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287879039] [2022-11-25 16:58:48,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:48,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:48,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:48,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287879039] [2022-11-25 16:58:48,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287879039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:48,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:48,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:58:48,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474883471] [2022-11-25 16:58:48,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:48,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:58:48,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:48,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:58:48,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:58:48,694 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 302 [2022-11-25 16:58:48,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:48,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:48,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 302 [2022-11-25 16:58:48,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:48,897 INFO L130 PetriNetUnfolder]: 122/279 cut-off events. [2022-11-25 16:58:48,897 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 16:58:48,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 279 events. 122/279 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1253 event pairs, 0 based on Foata normal form. 7/199 useless extension candidates. Maximal degree in co-relation 515. Up to 256 conditions per place. [2022-11-25 16:58:48,901 INFO L137 encePairwiseOnDemand]: 289/302 looper letters, 36 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2022-11-25 16:58:48,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 40 transitions, 164 flow [2022-11-25 16:58:48,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:58:48,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:58:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2022-11-25 16:58:48,937 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5011037527593819 [2022-11-25 16:58:48,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2022-11-25 16:58:48,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2022-11-25 16:58:48,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:48,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2022-11-25 16:58:48,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:48,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 302.0) internal successors, (1208), 4 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:48,975 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 302.0) internal successors, (1208), 4 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:48,977 INFO L175 Difference]: Start difference. First operand has 32 places, 41 transitions, 90 flow. Second operand 3 states and 454 transitions. [2022-11-25 16:58:48,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 40 transitions, 164 flow [2022-11-25 16:58:48,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 164 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 16:58:48,985 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 82 flow [2022-11-25 16:58:48,988 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2022-11-25 16:58:48,993 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2022-11-25 16:58:48,994 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 82 flow [2022-11-25 16:58:48,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:48,995 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:48,995 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 16:58:48,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:58:48,996 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 16:58:48,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:48,999 INFO L85 PathProgramCache]: Analyzing trace with hash 18412, now seen corresponding path program 1 times [2022-11-25 16:58:48,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:49,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062646524] [2022-11-25 16:58:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:49,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:49,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:49,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062646524] [2022-11-25 16:58:49,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062646524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:49,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:49,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:58:49,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144725764] [2022-11-25 16:58:49,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:49,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:58:49,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:49,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:58:49,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:58:49,159 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 302 [2022-11-25 16:58:49,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:49,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:49,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 302 [2022-11-25 16:58:49,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:49,319 INFO L130 PetriNetUnfolder]: 110/241 cut-off events. [2022-11-25 16:58:49,319 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-25 16:58:49,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 241 events. 110/241 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 914 event pairs, 84 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 487. Up to 209 conditions per place. [2022-11-25 16:58:49,321 INFO L137 encePairwiseOnDemand]: 297/302 looper letters, 31 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2022-11-25 16:58:49,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 158 flow [2022-11-25 16:58:49,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:58:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:58:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 429 transitions. [2022-11-25 16:58:49,324 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4735099337748344 [2022-11-25 16:58:49,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 429 transitions. [2022-11-25 16:58:49,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 429 transitions. [2022-11-25 16:58:49,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:49,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 429 transitions. [2022-11-25 16:58:49,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:49,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 302.0) internal successors, (1208), 4 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:49,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 302.0) internal successors, (1208), 4 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:49,330 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 82 flow. Second operand 3 states and 429 transitions. [2022-11-25 16:58:49,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 158 flow [2022-11-25 16:58:49,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 36 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 16:58:49,332 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 80 flow [2022-11-25 16:58:49,333 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2022-11-25 16:58:49,334 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2022-11-25 16:58:49,334 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 80 flow [2022-11-25 16:58:49,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:49,335 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:49,335 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 16:58:49,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 16:58:49,335 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 16:58:49,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:49,336 INFO L85 PathProgramCache]: Analyzing trace with hash 548880264, now seen corresponding path program 1 times [2022-11-25 16:58:49,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:49,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136851075] [2022-11-25 16:58:49,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:49,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:49,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:49,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:49,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136851075] [2022-11-25 16:58:49,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136851075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:58:49,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163028291] [2022-11-25 16:58:49,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:49,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:49,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:58:49,471 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:58:49,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:58:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:49,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 16:58:49,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:58:49,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:58:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:49,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:58:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:49,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163028291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:58:49,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:58:49,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-25 16:58:49,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982921639] [2022-11-25 16:58:49,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:58:49,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:58:49,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:49,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:58:49,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:58:50,063 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 302 [2022-11-25 16:58:50,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 80 flow. Second operand has 8 states, 8 states have (on average 131.875) internal successors, (1055), 8 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:50,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:50,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 302 [2022-11-25 16:58:50,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:50,159 INFO L130 PetriNetUnfolder]: 12/42 cut-off events. [2022-11-25 16:58:50,159 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:58:50,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 42 events. 12/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 110 event pairs, 0 based on Foata normal form. 7/46 useless extension candidates. Maximal degree in co-relation 91. Up to 26 conditions per place. [2022-11-25 16:58:50,161 INFO L137 encePairwiseOnDemand]: 298/302 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2022-11-25 16:58:50,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 18 transitions, 79 flow [2022-11-25 16:58:50,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:58:50,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 16:58:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 539 transitions. [2022-11-25 16:58:50,164 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4461920529801324 [2022-11-25 16:58:50,164 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 539 transitions. [2022-11-25 16:58:50,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 539 transitions. [2022-11-25 16:58:50,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:50,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 539 transitions. [2022-11-25 16:58:50,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:50,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 302.0) internal successors, (1510), 5 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:50,172 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 302.0) internal successors, (1510), 5 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:50,172 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 80 flow. Second operand 4 states and 539 transitions. [2022-11-25 16:58:50,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 18 transitions, 79 flow [2022-11-25 16:58:50,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 18 transitions, 76 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 16:58:50,174 INFO L231 Difference]: Finished difference. Result has 18 places, 11 transitions, 32 flow [2022-11-25 16:58:50,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=32, PETRI_PLACES=18, PETRI_TRANSITIONS=11} [2022-11-25 16:58:50,177 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, -14 predicate places. [2022-11-25 16:58:50,178 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 11 transitions, 32 flow [2022-11-25 16:58:50,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.875) internal successors, (1055), 8 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:50,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:50,180 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 16:58:50,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 16:58:50,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:50,393 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 16:58:50,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:50,394 INFO L85 PathProgramCache]: Analyzing trace with hash -164580666, now seen corresponding path program 1 times [2022-11-25 16:58:50,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:50,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527914882] [2022-11-25 16:58:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:50,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:58:50,428 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 16:58:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:58:50,472 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 16:58:50,472 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 16:58:50,474 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-11-25 16:58:50,479 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2022-11-25 16:58:50,479 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2022-11-25 16:58:50,479 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2022-11-25 16:58:50,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2022-11-25 16:58:50,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2022-11-25 16:58:50,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2022-11-25 16:58:50,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2022-11-25 16:58:50,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 16:58:50,485 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-25 16:58:50,489 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 16:58:50,489 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 16:58:50,530 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 16:58:50,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 178 transitions, 374 flow [2022-11-25 16:58:50,609 INFO L130 PetriNetUnfolder]: 43/374 cut-off events. [2022-11-25 16:58:50,615 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 16:58:50,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 374 events. 43/374 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1397 event pairs, 0 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 239. Up to 9 conditions per place. [2022-11-25 16:58:50,622 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 178 transitions, 374 flow [2022-11-25 16:58:50,626 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 178 transitions, 374 flow [2022-11-25 16:58:50,627 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:58:50,627 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 178 transitions, 374 flow [2022-11-25 16:58:50,628 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 178 transitions, 374 flow [2022-11-25 16:58:50,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 178 transitions, 374 flow [2022-11-25 16:58:50,702 INFO L130 PetriNetUnfolder]: 43/374 cut-off events. [2022-11-25 16:58:50,702 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 16:58:50,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 374 events. 43/374 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1397 event pairs, 0 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 239. Up to 9 conditions per place. [2022-11-25 16:58:50,714 INFO L119 LiptonReduction]: Number of co-enabled transitions 9284 [2022-11-25 16:58:56,002 INFO L134 LiptonReduction]: Checked pairs total: 14457 [2022-11-25 16:58:56,003 INFO L136 LiptonReduction]: Total number of compositions: 172 [2022-11-25 16:58:56,007 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:58:56,010 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;@537799e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:58:56,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-25 16:58:56,012 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-11-25 16:58:56,013 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:58:56,013 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:56,013 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 16:58:56,013 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 16:58:56,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:56,014 INFO L85 PathProgramCache]: Analyzing trace with hash 30375, now seen corresponding path program 1 times [2022-11-25 16:58:56,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:56,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404704542] [2022-11-25 16:58:56,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:56,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:56,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:56,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404704542] [2022-11-25 16:58:56,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404704542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:56,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:56,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:58:56,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917478318] [2022-11-25 16:58:56,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:56,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:58:56,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:56,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:58:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:58:56,093 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 350 [2022-11-25 16:58:56,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 52 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:56,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:56,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 350 [2022-11-25 16:58:56,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:56,498 INFO L130 PetriNetUnfolder]: 1647/2698 cut-off events. [2022-11-25 16:58:56,499 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 16:58:56,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5416 conditions, 2698 events. 1647/2698 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13861 event pairs, 1332 based on Foata normal form. 57/2072 useless extension candidates. Maximal degree in co-relation 2016. Up to 2345 conditions per place. [2022-11-25 16:58:56,520 INFO L137 encePairwiseOnDemand]: 335/350 looper letters, 45 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2022-11-25 16:58:56,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 52 transitions, 218 flow [2022-11-25 16:58:56,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:58:56,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:58:56,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2022-11-25 16:58:56,523 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2022-11-25 16:58:56,523 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2022-11-25 16:58:56,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2022-11-25 16:58:56,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:56,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2022-11-25 16:58:56,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:56,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:56,531 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:56,531 INFO L175 Difference]: Start difference. First operand has 43 places, 52 transitions, 122 flow. Second operand 3 states and 511 transitions. [2022-11-25 16:58:56,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 52 transitions, 218 flow [2022-11-25 16:58:56,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 218 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 16:58:56,539 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 104 flow [2022-11-25 16:58:56,539 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2022-11-25 16:58:56,542 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2022-11-25 16:58:56,542 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 104 flow [2022-11-25 16:58:56,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:56,543 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:56,543 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 16:58:56,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 16:58:56,544 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 16:58:56,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:56,544 INFO L85 PathProgramCache]: Analyzing trace with hash 30376, now seen corresponding path program 1 times [2022-11-25 16:58:56,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:56,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244976856] [2022-11-25 16:58:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:56,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:56,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:56,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244976856] [2022-11-25 16:58:56,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244976856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:56,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:56,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:58:56,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389971255] [2022-11-25 16:58:56,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:56,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:58:56,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:56,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:58:56,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:58:56,726 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 350 [2022-11-25 16:58:56,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:56,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:56,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 350 [2022-11-25 16:58:56,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:57,090 INFO L130 PetriNetUnfolder]: 1644/2697 cut-off events. [2022-11-25 16:58:57,090 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2022-11-25 16:58:57,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5537 conditions, 2697 events. 1644/2697 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13710 event pairs, 708 based on Foata normal form. 0/2076 useless extension candidates. Maximal degree in co-relation 4761. Up to 2645 conditions per place. [2022-11-25 16:58:57,108 INFO L137 encePairwiseOnDemand]: 346/350 looper letters, 42 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2022-11-25 16:58:57,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 48 transitions, 208 flow [2022-11-25 16:58:57,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:58:57,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:58:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2022-11-25 16:58:57,112 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4780952380952381 [2022-11-25 16:58:57,112 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2022-11-25 16:58:57,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2022-11-25 16:58:57,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:57,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2022-11-25 16:58:57,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:57,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:57,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:57,119 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 104 flow. Second operand 3 states and 502 transitions. [2022-11-25 16:58:57,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 48 transitions, 208 flow [2022-11-25 16:58:57,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 48 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 16:58:57,125 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 112 flow [2022-11-25 16:58:57,129 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2022-11-25 16:58:57,134 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2022-11-25 16:58:57,135 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 112 flow [2022-11-25 16:58:57,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:57,135 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:57,136 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 16:58:57,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 16:58:57,136 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 16:58:57,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:57,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1990961733, now seen corresponding path program 1 times [2022-11-25 16:58:57,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:57,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630466177] [2022-11-25 16:58:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:57,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:57,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:57,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630466177] [2022-11-25 16:58:57,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630466177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:58:57,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300334183] [2022-11-25 16:58:57,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:57,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:57,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:58:57,336 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:58:57,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:58:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:57,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 16:58:57,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:58:57,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:58:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:57,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:58:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:57,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300334183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:58:57,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:58:57,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 16:58:57,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71175927] [2022-11-25 16:58:57,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:58:57,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 16:58:57,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:57,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 16:58:57,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:58:57,692 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 350 [2022-11-25 16:58:57,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 112 flow. Second operand has 7 states, 7 states have (on average 150.71428571428572) internal successors, (1055), 7 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:57,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:57,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 350 [2022-11-25 16:58:57,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:58,129 INFO L130 PetriNetUnfolder]: 1485/2503 cut-off events. [2022-11-25 16:58:58,130 INFO L131 PetriNetUnfolder]: For 128/128 co-relation queries the response was YES. [2022-11-25 16:58:58,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5141 conditions, 2503 events. 1485/2503 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12951 event pairs, 1 based on Foata normal form. 7/1981 useless extension candidates. Maximal degree in co-relation 974. Up to 1936 conditions per place. [2022-11-25 16:58:58,144 INFO L137 encePairwiseOnDemand]: 344/350 looper letters, 63 selfloop transitions, 5 changer transitions 0/72 dead transitions. [2022-11-25 16:58:58,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 72 transitions, 308 flow [2022-11-25 16:58:58,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:58:58,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:58:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 816 transitions. [2022-11-25 16:58:58,147 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4662857142857143 [2022-11-25 16:58:58,147 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 816 transitions. [2022-11-25 16:58:58,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 816 transitions. [2022-11-25 16:58:58,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:58,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 816 transitions. [2022-11-25 16:58:58,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.2) internal successors, (816), 5 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:58,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 350.0) internal successors, (2100), 6 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:58,155 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 350.0) internal successors, (2100), 6 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:58,156 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 112 flow. Second operand 5 states and 816 transitions. [2022-11-25 16:58:58,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 72 transitions, 308 flow [2022-11-25 16:58:58,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 72 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:58:58,158 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 120 flow [2022-11-25 16:58:58,159 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2022-11-25 16:58:58,159 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2022-11-25 16:58:58,159 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 120 flow [2022-11-25 16:58:58,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.71428571428572) internal successors, (1055), 7 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:58,160 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:58,160 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 16:58:58,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 16:58:58,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 16:58:58,371 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 16:58:58,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1990720303, now seen corresponding path program 1 times [2022-11-25 16:58:58,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:58,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130252196] [2022-11-25 16:58:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:58,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:58,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:58,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130252196] [2022-11-25 16:58:58,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130252196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:58,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:58,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:58:58,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10162686] [2022-11-25 16:58:58,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:58,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:58:58,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:58,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:58:58,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:58:58,465 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 350 [2022-11-25 16:58:58,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:58,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:58:58,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 350 [2022-11-25 16:58:58,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:58:59,023 INFO L130 PetriNetUnfolder]: 2255/3817 cut-off events. [2022-11-25 16:58:59,023 INFO L131 PetriNetUnfolder]: For 308/308 co-relation queries the response was YES. [2022-11-25 16:58:59,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8021 conditions, 3817 events. 2255/3817 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 20253 event pairs, 1016 based on Foata normal form. 0/3192 useless extension candidates. Maximal degree in co-relation 3198. Up to 1879 conditions per place. [2022-11-25 16:58:59,046 INFO L137 encePairwiseOnDemand]: 343/350 looper letters, 58 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2022-11-25 16:58:59,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 67 transitions, 310 flow [2022-11-25 16:58:59,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:58:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:58:59,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2022-11-25 16:58:59,049 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5009523809523809 [2022-11-25 16:58:59,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2022-11-25 16:58:59,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2022-11-25 16:58:59,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:58:59,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2022-11-25 16:58:59,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:59,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:59,055 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:59,055 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 120 flow. Second operand 3 states and 526 transitions. [2022-11-25 16:58:59,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 67 transitions, 310 flow [2022-11-25 16:58:59,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 67 transitions, 296 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-11-25 16:58:59,066 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 150 flow [2022-11-25 16:58:59,066 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2022-11-25 16:58:59,068 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2022-11-25 16:58:59,068 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 150 flow [2022-11-25 16:58:59,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:59,069 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:58:59,070 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 16:58:59,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 16:58:59,070 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 16:58:59,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:59,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1661988707, now seen corresponding path program 1 times [2022-11-25 16:58:59,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:59,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287840253] [2022-11-25 16:58:59,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:59,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:58:59,092 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 16:58:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:58:59,130 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 16:58:59,130 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 16:58:59,131 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-11-25 16:58:59,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2022-11-25 16:58:59,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-11-25 16:58:59,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-11-25 16:58:59,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2022-11-25 16:58:59,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2022-11-25 16:58:59,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2022-11-25 16:58:59,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2022-11-25 16:58:59,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-11-25 16:58:59,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 16:58:59,133 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-25 16:58:59,134 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 16:58:59,134 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 16:58:59,162 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 16:58:59,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 202 transitions, 434 flow [2022-11-25 16:58:59,240 INFO L130 PetriNetUnfolder]: 65/554 cut-off events. [2022-11-25 16:58:59,240 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 16:58:59,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 554 events. 65/554 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2353 event pairs, 1 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 382. Up to 16 conditions per place. [2022-11-25 16:58:59,245 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 202 transitions, 434 flow [2022-11-25 16:58:59,249 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 202 transitions, 434 flow [2022-11-25 16:58:59,249 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:58:59,249 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 202 transitions, 434 flow [2022-11-25 16:58:59,250 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 202 transitions, 434 flow [2022-11-25 16:58:59,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 202 transitions, 434 flow [2022-11-25 16:58:59,316 INFO L130 PetriNetUnfolder]: 65/554 cut-off events. [2022-11-25 16:58:59,316 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 16:58:59,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 554 events. 65/554 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2353 event pairs, 1 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 382. Up to 16 conditions per place. [2022-11-25 16:58:59,335 INFO L119 LiptonReduction]: Number of co-enabled transitions 15576 [2022-11-25 16:59:04,671 INFO L134 LiptonReduction]: Checked pairs total: 26007 [2022-11-25 16:59:04,671 INFO L136 LiptonReduction]: Total number of compositions: 192 [2022-11-25 16:59:04,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:59:04,674 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;@537799e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:59:04,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-11-25 16:59:04,675 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 16:59:04,676 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:59:04,676 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:04,676 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 16:59:04,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 16:59:04,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:04,677 INFO L85 PathProgramCache]: Analyzing trace with hash 43753, now seen corresponding path program 1 times [2022-11-25 16:59:04,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:04,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905802996] [2022-11-25 16:59:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:04,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:04,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:04,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905802996] [2022-11-25 16:59:04,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905802996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:04,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:04,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:59:04,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021735028] [2022-11-25 16:59:04,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:04,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:59:04,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:04,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:59:04,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:59:04,752 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 394 [2022-11-25 16:59:04,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 64 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:04,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:04,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 394 [2022-11-25 16:59:04,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:07,219 INFO L130 PetriNetUnfolder]: 13453/20049 cut-off events. [2022-11-25 16:59:07,220 INFO L131 PetriNetUnfolder]: For 635/635 co-relation queries the response was YES. [2022-11-25 16:59:07,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39657 conditions, 20049 events. 13453/20049 cut-off events. For 635/635 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 127422 event pairs, 11079 based on Foata normal form. 1195/16357 useless extension candidates. Maximal degree in co-relation 4811. Up to 16672 conditions per place. [2022-11-25 16:59:07,406 INFO L137 encePairwiseOnDemand]: 375/394 looper letters, 55 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2022-11-25 16:59:07,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 274 flow [2022-11-25 16:59:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:59:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:59:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2022-11-25 16:59:07,410 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49323181049069376 [2022-11-25 16:59:07,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2022-11-25 16:59:07,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2022-11-25 16:59:07,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:07,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2022-11-25 16:59:07,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:07,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:07,417 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:07,417 INFO L175 Difference]: Start difference. First operand has 52 places, 64 transitions, 158 flow. Second operand 3 states and 583 transitions. [2022-11-25 16:59:07,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 274 flow [2022-11-25 16:59:07,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 16:59:07,421 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 132 flow [2022-11-25 16:59:07,421 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2022-11-25 16:59:07,423 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2022-11-25 16:59:07,423 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 132 flow [2022-11-25 16:59:07,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:07,423 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:07,424 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 16:59:07,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 16:59:07,424 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 16:59:07,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:07,424 INFO L85 PathProgramCache]: Analyzing trace with hash 43754, now seen corresponding path program 1 times [2022-11-25 16:59:07,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:07,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877260349] [2022-11-25 16:59:07,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:07,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:07,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:07,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877260349] [2022-11-25 16:59:07,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877260349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:07,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:07,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:59:07,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52819888] [2022-11-25 16:59:07,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:07,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:59:07,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:07,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:59:07,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:59:07,534 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 394 [2022-11-25 16:59:07,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:07,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:07,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 394 [2022-11-25 16:59:07,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:10,088 INFO L130 PetriNetUnfolder]: 13450/20074 cut-off events. [2022-11-25 16:59:10,088 INFO L131 PetriNetUnfolder]: For 881/881 co-relation queries the response was YES. [2022-11-25 16:59:10,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40456 conditions, 20074 events. 13450/20074 cut-off events. For 881/881 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 126355 event pairs, 8322 based on Foata normal form. 0/15581 useless extension candidates. Maximal degree in co-relation 34595. Up to 19145 conditions per place. [2022-11-25 16:59:10,207 INFO L137 encePairwiseOnDemand]: 390/394 looper letters, 47 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2022-11-25 16:59:10,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 55 transitions, 244 flow [2022-11-25 16:59:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:59:10,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:59:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2022-11-25 16:59:10,211 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4746192893401015 [2022-11-25 16:59:10,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2022-11-25 16:59:10,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2022-11-25 16:59:10,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:10,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2022-11-25 16:59:10,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:10,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:10,218 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:10,218 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 132 flow. Second operand 3 states and 561 transitions. [2022-11-25 16:59:10,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 55 transitions, 244 flow [2022-11-25 16:59:10,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 16:59:10,259 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 140 flow [2022-11-25 16:59:10,260 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2022-11-25 16:59:10,261 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2022-11-25 16:59:10,261 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 140 flow [2022-11-25 16:59:10,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:10,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:10,262 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 16:59:10,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 16:59:10,262 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 16:59:10,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:10,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1786136804, now seen corresponding path program 1 times [2022-11-25 16:59:10,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:10,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402711175] [2022-11-25 16:59:10,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:10,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:10,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:10,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402711175] [2022-11-25 16:59:10,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402711175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:59:10,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795217483] [2022-11-25 16:59:10,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:10,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:10,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:59:10,393 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:59:10,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 16:59:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:10,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 16:59:10,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:59:10,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:59:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:10,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:59:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:10,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795217483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:59:10,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:59:10,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 16:59:10,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613239110] [2022-11-25 16:59:10,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:59:10,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 16:59:10,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:10,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 16:59:10,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:59:10,731 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 394 [2022-11-25 16:59:10,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 140 flow. Second operand has 7 states, 7 states have (on average 168.71428571428572) internal successors, (1181), 7 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:10,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:10,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 394 [2022-11-25 16:59:10,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:13,143 INFO L130 PetriNetUnfolder]: 13008/19336 cut-off events. [2022-11-25 16:59:13,143 INFO L131 PetriNetUnfolder]: For 1364/1364 co-relation queries the response was YES. [2022-11-25 16:59:13,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39608 conditions, 19336 events. 13008/19336 cut-off events. For 1364/1364 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 120076 event pairs, 22 based on Foata normal form. 6/15051 useless extension candidates. Maximal degree in co-relation 8270. Up to 13501 conditions per place. [2022-11-25 16:59:13,269 INFO L137 encePairwiseOnDemand]: 388/394 looper letters, 104 selfloop transitions, 8 changer transitions 0/118 dead transitions. [2022-11-25 16:59:13,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 118 transitions, 510 flow [2022-11-25 16:59:13,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:59:13,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 16:59:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1118 transitions. [2022-11-25 16:59:13,275 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47292724196277497 [2022-11-25 16:59:13,275 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1118 transitions. [2022-11-25 16:59:13,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1118 transitions. [2022-11-25 16:59:13,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:13,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1118 transitions. [2022-11-25 16:59:13,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.33333333333334) internal successors, (1118), 6 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:13,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 394.0) internal successors, (2758), 7 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:13,288 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 394.0) internal successors, (2758), 7 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:13,288 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 140 flow. Second operand 6 states and 1118 transitions. [2022-11-25 16:59:13,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 118 transitions, 510 flow [2022-11-25 16:59:13,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 118 transitions, 508 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:59:13,296 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 162 flow [2022-11-25 16:59:13,297 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=162, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2022-11-25 16:59:13,298 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2022-11-25 16:59:13,298 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 162 flow [2022-11-25 16:59:13,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 168.71428571428572) internal successors, (1181), 7 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:13,299 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:13,300 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 16:59:13,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 16:59:13,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_872d0d51-7508-40dd-b2dc-f92d5f21fd63/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 16:59:13,510 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 16:59:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:13,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1786439124, now seen corresponding path program 1 times [2022-11-25 16:59:13,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:13,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30494303] [2022-11-25 16:59:13,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:13,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:13,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:13,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30494303] [2022-11-25 16:59:13,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30494303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:13,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:13,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:59:13,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160321824] [2022-11-25 16:59:13,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:13,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:59:13,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:13,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:59:13,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:59:13,611 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 394 [2022-11-25 16:59:13,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:13,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:13,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 394 [2022-11-25 16:59:13,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:16,430 INFO L130 PetriNetUnfolder]: 19548/29934 cut-off events. [2022-11-25 16:59:16,430 INFO L131 PetriNetUnfolder]: For 1901/1901 co-relation queries the response was YES. [2022-11-25 16:59:16,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61592 conditions, 29934 events. 19548/29934 cut-off events. For 1901/1901 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 202067 event pairs, 9148 based on Foata normal form. 0/25120 useless extension candidates. Maximal degree in co-relation 7438. Up to 14665 conditions per place. [2022-11-25 16:59:16,604 INFO L137 encePairwiseOnDemand]: 385/394 looper letters, 72 selfloop transitions, 6 changer transitions 0/84 dead transitions. [2022-11-25 16:59:16,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 84 transitions, 401 flow [2022-11-25 16:59:16,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:59:16,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:59:16,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2022-11-25 16:59:16,610 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-11-25 16:59:16,610 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2022-11-25 16:59:16,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2022-11-25 16:59:16,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:16,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2022-11-25 16:59:16,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:16,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:16,618 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:16,618 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 162 flow. Second operand 3 states and 591 transitions. [2022-11-25 16:59:16,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 84 transitions, 401 flow [2022-11-25 16:59:16,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 84 transitions, 388 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 16:59:16,627 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 203 flow [2022-11-25 16:59:16,628 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2022-11-25 16:59:16,629 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2022-11-25 16:59:16,629 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 203 flow [2022-11-25 16:59:16,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:16,630 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:16,630 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:16,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 16:59:16,631 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 16:59:16,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:16,631 INFO L85 PathProgramCache]: Analyzing trace with hash -2120286996, now seen corresponding path program 1 times [2022-11-25 16:59:16,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:16,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521718702] [2022-11-25 16:59:16,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:16,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:59:16,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:16,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521718702] [2022-11-25 16:59:16,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521718702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:16,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:16,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:59:16,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191303872] [2022-11-25 16:59:16,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:16,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:59:16,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:16,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:59:16,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:59:16,686 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 394 [2022-11-25 16:59:16,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:16,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:16,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 394 [2022-11-25 16:59:16,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:20,499 INFO L130 PetriNetUnfolder]: 26535/40450 cut-off events. [2022-11-25 16:59:20,499 INFO L131 PetriNetUnfolder]: For 12703/12703 co-relation queries the response was YES. [2022-11-25 16:59:20,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93368 conditions, 40450 events. 26535/40450 cut-off events. For 12703/12703 co-relation queries the response was YES. Maximal size of possible extension queue 1270. Compared 287670 event pairs, 16178 based on Foata normal form. 0/37477 useless extension candidates. Maximal degree in co-relation 23135. Up to 29144 conditions per place. [2022-11-25 16:59:20,727 INFO L137 encePairwiseOnDemand]: 390/394 looper letters, 76 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2022-11-25 16:59:20,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 453 flow [2022-11-25 16:59:20,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:59:20,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:59:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 580 transitions. [2022-11-25 16:59:20,730 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4906937394247039 [2022-11-25 16:59:20,730 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 580 transitions. [2022-11-25 16:59:20,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 580 transitions. [2022-11-25 16:59:20,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:20,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 580 transitions. [2022-11-25 16:59:20,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:20,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:20,738 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:20,738 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 203 flow. Second operand 3 states and 580 transitions. [2022-11-25 16:59:20,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 453 flow [2022-11-25 16:59:20,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 431 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 16:59:20,792 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 210 flow [2022-11-25 16:59:20,792 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2022-11-25 16:59:20,793 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2022-11-25 16:59:20,794 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 210 flow [2022-11-25 16:59:20,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:20,794 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:20,795 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:20,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 16:59:20,795 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 16:59:20,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:20,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1304368973, now seen corresponding path program 1 times [2022-11-25 16:59:20,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:20,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885601468] [2022-11-25 16:59:20,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:20,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 16:59:20,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:20,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885601468] [2022-11-25 16:59:20,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885601468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:20,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:20,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:59:20,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577356147] [2022-11-25 16:59:20,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:20,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:59:20,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:20,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:59:20,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:59:20,999 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 394 [2022-11-25 16:59:21,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:21,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:21,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 394 [2022-11-25 16:59:21,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:24,362 INFO L130 PetriNetUnfolder]: 22991/35308 cut-off events. [2022-11-25 16:59:24,362 INFO L131 PetriNetUnfolder]: For 6884/6884 co-relation queries the response was YES. [2022-11-25 16:59:24,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81822 conditions, 35308 events. 22991/35308 cut-off events. For 6884/6884 co-relation queries the response was YES. Maximal size of possible extension queue 1175. Compared 248727 event pairs, 16073 based on Foata normal form. 544/32322 useless extension candidates. Maximal degree in co-relation 9899. Up to 28110 conditions per place. [2022-11-25 16:59:24,574 INFO L137 encePairwiseOnDemand]: 388/394 looper letters, 88 selfloop transitions, 7 changer transitions 0/101 dead transitions. [2022-11-25 16:59:24,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 101 transitions, 531 flow [2022-11-25 16:59:24,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:59:24,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 16:59:24,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 753 transitions. [2022-11-25 16:59:24,579 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47779187817258884 [2022-11-25 16:59:24,579 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 753 transitions. [2022-11-25 16:59:24,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 753 transitions. [2022-11-25 16:59:24,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:24,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 753 transitions. [2022-11-25 16:59:24,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 188.25) internal successors, (753), 4 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:24,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 394.0) internal successors, (1970), 5 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:24,588 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 394.0) internal successors, (1970), 5 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:24,588 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 210 flow. Second operand 4 states and 753 transitions. [2022-11-25 16:59:24,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 101 transitions, 531 flow [2022-11-25 16:59:24,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 101 transitions, 528 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:59:24,599 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 229 flow [2022-11-25 16:59:24,600 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=229, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2022-11-25 16:59:24,601 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 11 predicate places. [2022-11-25 16:59:24,601 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 229 flow [2022-11-25 16:59:24,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:24,602 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:24,602 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 16:59:24,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 16:59:24,603 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 16:59:24,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:24,606 INFO L85 PathProgramCache]: Analyzing trace with hash 102170465, now seen corresponding path program 1 times [2022-11-25 16:59:24,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:24,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061689894] [2022-11-25 16:59:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:24,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:59:24,639 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 16:59:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:59:24,671 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 16:59:24,672 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 16:59:24,673 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2022-11-25 16:59:24,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2022-11-25 16:59:24,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2022-11-25 16:59:24,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2022-11-25 16:59:24,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2022-11-25 16:59:24,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2022-11-25 16:59:24,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2022-11-25 16:59:24,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2022-11-25 16:59:24,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2022-11-25 16:59:24,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2022-11-25 16:59:24,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 16:59:24,676 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:24,677 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 16:59:24,677 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 16:59:24,703 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 16:59:24,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 226 transitions, 496 flow [2022-11-25 16:59:24,818 INFO L130 PetriNetUnfolder]: 99/822 cut-off events. [2022-11-25 16:59:24,819 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 16:59:24,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 822 events. 99/822 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3887 event pairs, 6 based on Foata normal form. 0/661 useless extension candidates. Maximal degree in co-relation 574. Up to 32 conditions per place. [2022-11-25 16:59:24,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 208 places, 226 transitions, 496 flow [2022-11-25 16:59:24,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 226 transitions, 496 flow [2022-11-25 16:59:24,833 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:59:24,834 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 208 places, 226 transitions, 496 flow [2022-11-25 16:59:24,835 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 208 places, 226 transitions, 496 flow [2022-11-25 16:59:24,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 226 transitions, 496 flow [2022-11-25 16:59:25,158 INFO L130 PetriNetUnfolder]: 99/822 cut-off events. [2022-11-25 16:59:25,158 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 16:59:25,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 822 events. 99/822 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3887 event pairs, 6 based on Foata normal form. 0/661 useless extension candidates. Maximal degree in co-relation 574. Up to 32 conditions per place. [2022-11-25 16:59:25,189 INFO L119 LiptonReduction]: Number of co-enabled transitions 22968 [2022-11-25 16:59:31,427 INFO L134 LiptonReduction]: Checked pairs total: 40317 [2022-11-25 16:59:31,427 INFO L136 LiptonReduction]: Total number of compositions: 214 [2022-11-25 16:59:31,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:59:31,430 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;@537799e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:59:31,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-11-25 16:59:31,432 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-11-25 16:59:31,432 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:59:31,432 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:31,432 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 16:59:31,432 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:59:31,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:31,433 INFO L85 PathProgramCache]: Analyzing trace with hash 58596, now seen corresponding path program 1 times [2022-11-25 16:59:31,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:31,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009206552] [2022-11-25 16:59:31,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:31,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:31,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:31,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009206552] [2022-11-25 16:59:31,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009206552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:31,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:31,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:59:31,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764962534] [2022-11-25 16:59:31,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:31,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:59:31,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:31,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:59:31,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:59:31,641 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 440 [2022-11-25 16:59:31,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 73 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:31,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:31,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 440 [2022-11-25 16:59:31,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:48,563 INFO L130 PetriNetUnfolder]: 149680/204973 cut-off events. [2022-11-25 16:59:48,563 INFO L131 PetriNetUnfolder]: For 7596/7596 co-relation queries the response was YES. [2022-11-25 16:59:48,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406406 conditions, 204973 events. 149680/204973 cut-off events. For 7596/7596 co-relation queries the response was YES. Maximal size of possible extension queue 5256. Compared 1416203 event pairs, 107937 based on Foata normal form. 8770/163829 useless extension candidates. Maximal degree in co-relation 51784. Up to 197241 conditions per place. [2022-11-25 16:59:49,486 INFO L137 encePairwiseOnDemand]: 421/440 looper letters, 58 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2022-11-25 16:59:49,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 66 transitions, 296 flow [2022-11-25 16:59:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:59:49,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:59:49,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 643 transitions. [2022-11-25 16:59:49,489 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4871212121212121 [2022-11-25 16:59:49,489 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 643 transitions. [2022-11-25 16:59:49,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 643 transitions. [2022-11-25 16:59:49,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:49,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 643 transitions. [2022-11-25 16:59:49,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:49,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:49,496 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:49,496 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 190 flow. Second operand 3 states and 643 transitions. [2022-11-25 16:59:49,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 66 transitions, 296 flow [2022-11-25 16:59:49,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 66 transitions, 296 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 16:59:49,499 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 174 flow [2022-11-25 16:59:49,500 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2022-11-25 16:59:49,500 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2022-11-25 16:59:49,501 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 174 flow [2022-11-25 16:59:49,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:49,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:49,501 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 16:59:49,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 16:59:49,502 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:59:49,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:49,503 INFO L85 PathProgramCache]: Analyzing trace with hash 58595, now seen corresponding path program 1 times [2022-11-25 16:59:49,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:49,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961156628] [2022-11-25 16:59:49,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:49,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:49,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:49,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961156628] [2022-11-25 16:59:49,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961156628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:49,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:49,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:59:49,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600140688] [2022-11-25 16:59:49,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:49,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:59:49,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:49,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:59:49,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:59:49,566 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 440 [2022-11-25 16:59:49,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:49,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:49,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 440 [2022-11-25 16:59:49,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand