./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-30.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-30.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d7df89eaaa05ee1c4077455abbd501c07d86257ca2c037ce71ae27b3838effb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 03:32:01,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:32:01,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:32:01,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:32:01,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:32:01,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:32:01,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:32:01,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:32:01,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:32:01,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:32:01,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:32:01,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:32:01,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:32:01,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:32:01,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:32:01,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:32:01,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:32:01,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:32:01,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:32:01,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:32:01,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:32:01,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:32:01,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:32:01,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:32:01,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:32:01,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:32:01,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:32:01,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:32:01,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:32:01,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:32:01,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:32:01,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:32:01,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:32:01,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:32:01,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:32:01,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:32:01,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:32:01,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:32:01,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:32:01,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:32:01,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:32:01,504 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 03:32:01,552 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:32:01,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:32:01,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:32:01,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:32:01,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:32:01,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:32:01,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:32:01,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:32:01,556 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:32:01,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:32:01,557 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:32:01,557 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 03:32:01,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:32:01,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:32:01,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:32:01,558 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 03:32:01,559 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 03:32:01,559 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 03:32:01,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:32:01,559 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 03:32:01,560 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:32:01,560 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:32:01,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:32:01,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:32:01,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:32:01,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:32:01,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:32:01,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:32:01,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:32:01,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:32:01,563 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:32:01,564 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:32:01,564 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:32:01,564 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_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d7df89eaaa05ee1c4077455abbd501c07d86257ca2c037ce71ae27b3838effb [2022-11-23 03:32:01,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:32:01,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:32:01,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:32:01,957 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:32:01,958 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:32:01,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-30.i [2022-11-23 03:32:05,167 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:32:05,422 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:32:05,422 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-30.i [2022-11-23 03:32:05,449 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/data/df56ef5df/bb4ecbc5583c4af5a7188312067f5378/FLAGd5d29c951 [2022-11-23 03:32:05,465 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/data/df56ef5df/bb4ecbc5583c4af5a7188312067f5378 [2022-11-23 03:32:05,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:32:05,469 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:32:05,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:32:05,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:32:05,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:32:05,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:32:05" (1/1) ... [2022-11-23 03:32:05,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@585e8c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:05, skipping insertion in model container [2022-11-23 03:32:05,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:32:05" (1/1) ... [2022-11-23 03:32:05,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:32:05,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:32:05,887 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_3fbeb9b2-7c89-4864-a706-26ace13d64ed/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-30.i[30190,30203] [2022-11-23 03:32:05,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:32:05,914 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:32:05,957 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_3fbeb9b2-7c89-4864-a706-26ace13d64ed/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-30.i[30190,30203] [2022-11-23 03:32:05,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:32:06,017 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:32:06,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:06 WrapperNode [2022-11-23 03:32:06,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:32:06,020 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:32:06,020 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:32:06,020 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:32:06,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:06" (1/1) ... [2022-11-23 03:32:06,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:06" (1/1) ... [2022-11-23 03:32:06,104 INFO L138 Inliner]: procedures = 163, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 71 [2022-11-23 03:32:06,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:32:06,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:32:06,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:32:06,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:32:06,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:06" (1/1) ... [2022-11-23 03:32:06,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:06" (1/1) ... [2022-11-23 03:32:06,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:06" (1/1) ... [2022-11-23 03:32:06,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:06" (1/1) ... [2022-11-23 03:32:06,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:06" (1/1) ... [2022-11-23 03:32:06,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:06" (1/1) ... [2022-11-23 03:32:06,163 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:06" (1/1) ... [2022-11-23 03:32:06,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:06" (1/1) ... [2022-11-23 03:32:06,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:32:06,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:32:06,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:32:06,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:32:06,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:06" (1/1) ... [2022-11-23 03:32:06,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:32:06,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:32:06,236 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:32:06,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:32:06,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 03:32:06,291 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2022-11-23 03:32:06,291 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2022-11-23 03:32:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:32:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 03:32:06,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:32:06,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:32:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:32:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2022-11-23 03:32:06,294 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2022-11-23 03:32:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:32:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 03:32:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:32:06,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:32:06,297 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:32:06,480 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:32:06,483 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:32:06,824 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:32:06,832 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:32:06,832 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 03:32:06,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:32:06 BoogieIcfgContainer [2022-11-23 03:32:06,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:32:06,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:32:06,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:32:06,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:32:06,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:32:05" (1/3) ... [2022-11-23 03:32:06,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b5cfb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:32:06, skipping insertion in model container [2022-11-23 03:32:06,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:06" (2/3) ... [2022-11-23 03:32:06,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b5cfb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:32:06, skipping insertion in model container [2022-11-23 03:32:06,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:32:06" (3/3) ... [2022-11-23 03:32:06,846 INFO L112 eAbstractionObserver]: Analyzing ICFG reorder_c11_bad-30.i [2022-11-23 03:32:06,868 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:32:06,868 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-23 03:32:06,868 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:32:06,968 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-23 03:32:07,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 103 transitions, 228 flow [2022-11-23 03:32:07,133 INFO L130 PetriNetUnfolder]: 24/243 cut-off events. [2022-11-23 03:32:07,134 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-23 03:32:07,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 243 events. 24/243 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 890 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 126. Up to 8 conditions per place. [2022-11-23 03:32:07,142 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 103 transitions, 228 flow [2022-11-23 03:32:07,147 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 103 transitions, 228 flow [2022-11-23 03:32:07,151 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:32:07,174 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 103 transitions, 228 flow [2022-11-23 03:32:07,177 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 103 transitions, 228 flow [2022-11-23 03:32:07,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 103 transitions, 228 flow [2022-11-23 03:32:07,281 INFO L130 PetriNetUnfolder]: 24/243 cut-off events. [2022-11-23 03:32:07,282 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-23 03:32:07,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 243 events. 24/243 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 890 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 126. Up to 8 conditions per place. [2022-11-23 03:32:07,287 INFO L119 LiptonReduction]: Number of co-enabled transitions 1488 [2022-11-23 03:32:11,379 INFO L134 LiptonReduction]: Checked pairs total: 2714 [2022-11-23 03:32:11,379 INFO L136 LiptonReduction]: Total number of compositions: 89 [2022-11-23 03:32:11,399 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:32:11,411 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;@22d29dea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:32:11,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-11-23 03:32:11,415 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-11-23 03:32:11,416 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:32:11,416 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:32:11,418 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:32:11,419 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 03:32:11,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:32:11,427 INFO L85 PathProgramCache]: Analyzing trace with hash 12139, now seen corresponding path program 1 times [2022-11-23 03:32:11,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:32:11,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928240414] [2022-11-23 03:32:11,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:32:11,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:32:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:32:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:32:11,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:32:11,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928240414] [2022-11-23 03:32:11,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928240414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:32:11,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:32:11,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:32:11,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761147949] [2022-11-23 03:32:11,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:32:11,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:32:11,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:32:11,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:32:11,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:32:11,970 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2022-11-23 03:32:11,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:11,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:32:11,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2022-11-23 03:32:11,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:32:12,224 INFO L130 PetriNetUnfolder]: 244/511 cut-off events. [2022-11-23 03:32:12,225 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-23 03:32:12,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1038 conditions, 511 events. 244/511 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2490 event pairs, 196 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 794. Up to 429 conditions per place. [2022-11-23 03:32:12,235 INFO L137 encePairwiseOnDemand]: 187/192 looper letters, 31 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2022-11-23 03:32:12,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 38 transitions, 166 flow [2022-11-23 03:32:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:32:12,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:32:12,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2022-11-23 03:32:12,267 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2022-11-23 03:32:12,269 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2022-11-23 03:32:12,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2022-11-23 03:32:12,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:32:12,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2022-11-23 03:32:12,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:12,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:12,291 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:12,294 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 94 flow. Second operand 3 states and 282 transitions. [2022-11-23 03:32:12,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 38 transitions, 166 flow [2022-11-23 03:32:12,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 166 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 03:32:12,304 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 96 flow [2022-11-23 03:32:12,307 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2022-11-23 03:32:12,312 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2022-11-23 03:32:12,312 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 96 flow [2022-11-23 03:32:12,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:12,313 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:32:12,313 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:32:12,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:32:12,314 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 03:32:12,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:32:12,318 INFO L85 PathProgramCache]: Analyzing trace with hash 12138, now seen corresponding path program 1 times [2022-11-23 03:32:12,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:32:12,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326040901] [2022-11-23 03:32:12,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:32:12,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:32:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:32:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:32:12,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:32:12,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326040901] [2022-11-23 03:32:12,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326040901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:32:12,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:32:12,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:32:12,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48801700] [2022-11-23 03:32:12,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:32:12,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:32:12,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:32:12,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:32:12,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:32:12,693 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 192 [2022-11-23 03:32:12,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:12,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:32:12,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 192 [2022-11-23 03:32:12,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:32:12,829 INFO L130 PetriNetUnfolder]: 232/481 cut-off events. [2022-11-23 03:32:12,830 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-23 03:32:12,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1010 conditions, 481 events. 232/481 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2219 event pairs, 100 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 842. Up to 457 conditions per place. [2022-11-23 03:32:12,834 INFO L137 encePairwiseOnDemand]: 188/192 looper letters, 31 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2022-11-23 03:32:12,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 168 flow [2022-11-23 03:32:12,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:32:12,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:32:12,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2022-11-23 03:32:12,837 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4670138888888889 [2022-11-23 03:32:12,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2022-11-23 03:32:12,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2022-11-23 03:32:12,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:32:12,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2022-11-23 03:32:12,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:12,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:12,842 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:12,843 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 96 flow. Second operand 3 states and 269 transitions. [2022-11-23 03:32:12,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 168 flow [2022-11-23 03:32:12,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:32:12,846 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 100 flow [2022-11-23 03:32:12,847 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2022-11-23 03:32:12,847 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2022-11-23 03:32:12,848 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 100 flow [2022-11-23 03:32:12,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:12,848 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:32:12,849 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 03:32:12,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:32:12,849 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 03:32:12,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:32:12,850 INFO L85 PathProgramCache]: Analyzing trace with hash 361829227, now seen corresponding path program 1 times [2022-11-23 03:32:12,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:32:12,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994623010] [2022-11-23 03:32:12,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:32:12,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:32:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:32:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:32:12,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:32:12,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994623010] [2022-11-23 03:32:12,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994623010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:32:12,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465664012] [2022-11-23 03:32:12,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:32:12,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:32:12,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:32:13,000 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:32:13,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:32:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:32:13,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 03:32:13,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:32:13,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:32:13,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 03:32:13,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 03:32:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:32:13,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:32:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:32:13,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465664012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:32:13,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:32:13,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-23 03:32:13,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350594376] [2022-11-23 03:32:13,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:32:13,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:32:13,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:32:13,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:32:13,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:32:13,749 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 192 [2022-11-23 03:32:13,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 100 flow. Second operand has 8 states, 8 states have (on average 69.875) internal successors, (559), 8 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:13,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:32:13,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 192 [2022-11-23 03:32:13,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:32:13,792 INFO L130 PetriNetUnfolder]: 4/18 cut-off events. [2022-11-23 03:32:13,792 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:32:13,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 18 events. 4/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 0 based on Foata normal form. 3/21 useless extension candidates. Maximal degree in co-relation 45. Up to 10 conditions per place. [2022-11-23 03:32:13,793 INFO L137 encePairwiseOnDemand]: 188/192 looper letters, 7 selfloop transitions, 2 changer transitions 0/10 dead transitions. [2022-11-23 03:32:13,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 10 transitions, 49 flow [2022-11-23 03:32:13,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:32:13,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:32:13,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 283 transitions. [2022-11-23 03:32:13,796 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3684895833333333 [2022-11-23 03:32:13,796 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 283 transitions. [2022-11-23 03:32:13,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 283 transitions. [2022-11-23 03:32:13,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:32:13,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 283 transitions. [2022-11-23 03:32:13,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:13,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:13,801 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:13,801 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 100 flow. Second operand 4 states and 283 transitions. [2022-11-23 03:32:13,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 10 transitions, 49 flow [2022-11-23 03:32:13,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 10 transitions, 43 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 03:32:13,802 INFO L231 Difference]: Finished difference. Result has 14 places, 7 transitions, 23 flow [2022-11-23 03:32:13,803 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=23, PETRI_PLACES=14, PETRI_TRANSITIONS=7} [2022-11-23 03:32:13,804 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, -23 predicate places. [2022-11-23 03:32:13,804 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 7 transitions, 23 flow [2022-11-23 03:32:13,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 69.875) internal successors, (559), 8 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:13,805 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:32:13,805 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-23 03:32:13,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:32:14,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:32:14,012 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-23 03:32:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:32:14,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1668195628, now seen corresponding path program 1 times [2022-11-23 03:32:14,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:32:14,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307038520] [2022-11-23 03:32:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:32:14,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:32:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:32:14,046 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 03:32:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:32:14,093 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 03:32:14,094 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 03:32:14,100 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2022-11-23 03:32:14,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (11 of 13 remaining) [2022-11-23 03:32:14,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2022-11-23 03:32:14,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2022-11-23 03:32:14,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2022-11-23 03:32:14,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2022-11-23 03:32:14,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2022-11-23 03:32:14,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2022-11-23 03:32:14,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2022-11-23 03:32:14,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining) [2022-11-23 03:32:14,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (2 of 13 remaining) [2022-11-23 03:32:14,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 13 remaining) [2022-11-23 03:32:14,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2022-11-23 03:32:14,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 03:32:14,114 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-23 03:32:14,120 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 03:32:14,120 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-23 03:32:14,197 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-23 03:32:14,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 122 transitions, 292 flow [2022-11-23 03:32:14,325 INFO L130 PetriNetUnfolder]: 107/793 cut-off events. [2022-11-23 03:32:14,326 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-23 03:32:14,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 793 events. 107/793 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4292 event pairs, 2 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 468. Up to 32 conditions per place. [2022-11-23 03:32:14,332 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 122 transitions, 292 flow [2022-11-23 03:32:14,337 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 122 transitions, 292 flow [2022-11-23 03:32:14,337 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:32:14,338 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 122 transitions, 292 flow [2022-11-23 03:32:14,338 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 122 transitions, 292 flow [2022-11-23 03:32:14,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 122 transitions, 292 flow [2022-11-23 03:32:14,451 INFO L130 PetriNetUnfolder]: 107/793 cut-off events. [2022-11-23 03:32:14,451 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-23 03:32:14,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 793 events. 107/793 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4292 event pairs, 2 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 468. Up to 32 conditions per place. [2022-11-23 03:32:14,470 INFO L119 LiptonReduction]: Number of co-enabled transitions 3568 [2022-11-23 03:32:18,272 INFO L134 LiptonReduction]: Checked pairs total: 7587 [2022-11-23 03:32:18,272 INFO L136 LiptonReduction]: Total number of compositions: 97 [2022-11-23 03:32:18,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:32:18,276 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;@22d29dea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:32:18,276 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-11-23 03:32:18,278 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-11-23 03:32:18,278 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:32:18,279 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:32:18,279 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:32:18,279 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 03:32:18,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:32:18,280 INFO L85 PathProgramCache]: Analyzing trace with hash 19704, now seen corresponding path program 1 times [2022-11-23 03:32:18,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:32:18,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054001771] [2022-11-23 03:32:18,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:32:18,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:32:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:32:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:32:18,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:32:18,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054001771] [2022-11-23 03:32:18,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054001771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:32:18,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:32:18,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:32:18,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819284927] [2022-11-23 03:32:18,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:32:18,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:32:18,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:32:18,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:32:18,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:32:18,470 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 219 [2022-11-23 03:32:18,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:18,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:32:18,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 219 [2022-11-23 03:32:18,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:32:19,933 INFO L130 PetriNetUnfolder]: 7826/11957 cut-off events. [2022-11-23 03:32:19,933 INFO L131 PetriNetUnfolder]: For 1002/1002 co-relation queries the response was YES. [2022-11-23 03:32:19,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24263 conditions, 11957 events. 7826/11957 cut-off events. For 1002/1002 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 69897 event pairs, 5448 based on Foata normal form. 0/7809 useless extension candidates. Maximal degree in co-relation 7512. Up to 11562 conditions per place. [2022-11-23 03:32:20,074 INFO L137 encePairwiseOnDemand]: 215/219 looper letters, 45 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2022-11-23 03:32:20,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 248 flow [2022-11-23 03:32:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:32:20,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:32:20,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 316 transitions. [2022-11-23 03:32:20,079 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4809741248097412 [2022-11-23 03:32:20,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 316 transitions. [2022-11-23 03:32:20,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 316 transitions. [2022-11-23 03:32:20,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:32:20,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 316 transitions. [2022-11-23 03:32:20,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:20,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:20,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:20,084 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 144 flow. Second operand 3 states and 316 transitions. [2022-11-23 03:32:20,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 248 flow [2022-11-23 03:32:20,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 53 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 03:32:20,091 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 158 flow [2022-11-23 03:32:20,092 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=49, 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=158, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2022-11-23 03:32:20,094 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2022-11-23 03:32:20,094 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 158 flow [2022-11-23 03:32:20,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:20,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:32:20,095 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:32:20,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 03:32:20,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 03:32:20,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:32:20,096 INFO L85 PathProgramCache]: Analyzing trace with hash 19703, now seen corresponding path program 1 times [2022-11-23 03:32:20,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:32:20,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233110215] [2022-11-23 03:32:20,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:32:20,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:32:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:32:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:32:20,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:32:20,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233110215] [2022-11-23 03:32:20,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233110215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:32:20,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:32:20,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:32:20,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698167598] [2022-11-23 03:32:20,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:32:20,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:32:20,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:32:20,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:32:20,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:32:20,211 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2022-11-23 03:32:20,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:20,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:32:20,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2022-11-23 03:32:20,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:32:21,637 INFO L130 PetriNetUnfolder]: 7300/11162 cut-off events. [2022-11-23 03:32:21,637 INFO L131 PetriNetUnfolder]: For 1026/1026 co-relation queries the response was YES. [2022-11-23 03:32:21,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22715 conditions, 11162 events. 7300/11162 cut-off events. For 1026/1026 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 64931 event pairs, 5876 based on Foata normal form. 0/7423 useless extension candidates. Maximal degree in co-relation 22681. Up to 9236 conditions per place. [2022-11-23 03:32:21,719 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 46 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2022-11-23 03:32:21,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 55 transitions, 268 flow [2022-11-23 03:32:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:32:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:32:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2022-11-23 03:32:21,721 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5007610350076104 [2022-11-23 03:32:21,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2022-11-23 03:32:21,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2022-11-23 03:32:21,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:32:21,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2022-11-23 03:32:21,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:21,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:21,726 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:21,726 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 158 flow. Second operand 3 states and 329 transitions. [2022-11-23 03:32:21,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 55 transitions, 268 flow [2022-11-23 03:32:21,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:32:21,730 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 158 flow [2022-11-23 03:32:21,730 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2022-11-23 03:32:21,731 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2022-11-23 03:32:21,731 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 158 flow [2022-11-23 03:32:21,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:21,732 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:32:21,732 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 03:32:21,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 03:32:21,733 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 03:32:21,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:32:21,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1029969640, now seen corresponding path program 1 times [2022-11-23 03:32:21,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:32:21,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132150320] [2022-11-23 03:32:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:32:21,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:32:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:32:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:32:21,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:32:21,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132150320] [2022-11-23 03:32:21,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132150320] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:32:21,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051453011] [2022-11-23 03:32:21,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:32:21,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:32:21,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:32:21,968 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:32:21,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:32:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:32:22,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 03:32:22,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:32:22,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:32:22,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 03:32:22,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 03:32:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:32:22,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:32:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:32:22,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051453011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:32:22,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:32:22,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-23 03:32:22,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355682858] [2022-11-23 03:32:22,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:32:22,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:32:22,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:32:22,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:32:22,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:32:22,545 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 219 [2022-11-23 03:32:22,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 158 flow. Second operand has 8 states, 8 states have (on average 80.875) internal successors, (647), 8 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:22,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:32:22,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 219 [2022-11-23 03:32:22,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:32:24,050 INFO L130 PetriNetUnfolder]: 6933/10585 cut-off events. [2022-11-23 03:32:24,054 INFO L131 PetriNetUnfolder]: For 978/978 co-relation queries the response was YES. [2022-11-23 03:32:24,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22023 conditions, 10585 events. 6933/10585 cut-off events. For 978/978 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 59607 event pairs, 2791 based on Foata normal form. 3/7342 useless extension candidates. Maximal degree in co-relation 18427. Up to 8810 conditions per place. [2022-11-23 03:32:24,136 INFO L137 encePairwiseOnDemand]: 213/219 looper letters, 54 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2022-11-23 03:32:24,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 66 transitions, 314 flow [2022-11-23 03:32:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:32:24,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:32:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 537 transitions. [2022-11-23 03:32:24,139 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.408675799086758 [2022-11-23 03:32:24,139 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 537 transitions. [2022-11-23 03:32:24,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 537 transitions. [2022-11-23 03:32:24,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:32:24,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 537 transitions. [2022-11-23 03:32:24,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:24,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:24,145 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:24,145 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 158 flow. Second operand 6 states and 537 transitions. [2022-11-23 03:32:24,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 66 transitions, 314 flow [2022-11-23 03:32:24,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:32:24,173 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 160 flow [2022-11-23 03:32:24,174 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2022-11-23 03:32:24,175 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2022-11-23 03:32:24,175 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 160 flow [2022-11-23 03:32:24,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 80.875) internal successors, (647), 8 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:24,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:32:24,180 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-23 03:32:24,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:32:24,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fbeb9b2-7c89-4864-a706-26ace13d64ed/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:32:24,387 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 03:32:24,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:32:24,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1354118329, now seen corresponding path program 1 times [2022-11-23 03:32:24,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:32:24,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032257054] [2022-11-23 03:32:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:32:24,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:32:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:32:24,413 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 03:32:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:32:24,437 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 03:32:24,437 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 03:32:24,438 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 14 remaining) [2022-11-23 03:32:24,440 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (12 of 14 remaining) [2022-11-23 03:32:24,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2022-11-23 03:32:24,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2022-11-23 03:32:24,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2022-11-23 03:32:24,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2022-11-23 03:32:24,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2022-11-23 03:32:24,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2022-11-23 03:32:24,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2022-11-23 03:32:24,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2022-11-23 03:32:24,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (3 of 14 remaining) [2022-11-23 03:32:24,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 14 remaining) [2022-11-23 03:32:24,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 14 remaining) [2022-11-23 03:32:24,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2022-11-23 03:32:24,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 03:32:24,445 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-23 03:32:24,446 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 03:32:24,446 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-23 03:32:24,493 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2022-11-23 03:32:24,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 141 transitions, 360 flow [2022-11-23 03:32:24,971 INFO L130 PetriNetUnfolder]: 496/2769 cut-off events. [2022-11-23 03:32:24,971 INFO L131 PetriNetUnfolder]: For 419/419 co-relation queries the response was YES. [2022-11-23 03:32:24,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3220 conditions, 2769 events. 496/2769 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 20313 event pairs, 64 based on Foata normal form. 0/2089 useless extension candidates. Maximal degree in co-relation 1654. Up to 192 conditions per place. [2022-11-23 03:32:24,991 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 141 transitions, 360 flow [2022-11-23 03:32:25,005 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 141 transitions, 360 flow [2022-11-23 03:32:25,005 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:32:25,006 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 141 transitions, 360 flow [2022-11-23 03:32:25,006 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 141 transitions, 360 flow [2022-11-23 03:32:25,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 141 transitions, 360 flow [2022-11-23 03:32:25,390 INFO L130 PetriNetUnfolder]: 496/2769 cut-off events. [2022-11-23 03:32:25,390 INFO L131 PetriNetUnfolder]: For 419/419 co-relation queries the response was YES. [2022-11-23 03:32:25,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3220 conditions, 2769 events. 496/2769 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 20313 event pairs, 64 based on Foata normal form. 0/2089 useless extension candidates. Maximal degree in co-relation 1654. Up to 192 conditions per place. [2022-11-23 03:32:25,465 INFO L119 LiptonReduction]: Number of co-enabled transitions 6240 [2022-11-23 03:32:29,691 INFO L134 LiptonReduction]: Checked pairs total: 14710 [2022-11-23 03:32:29,691 INFO L136 LiptonReduction]: Total number of compositions: 112 [2022-11-23 03:32:29,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:32:29,694 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;@22d29dea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:32:29,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-11-23 03:32:29,696 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2022-11-23 03:32:29,696 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:32:29,696 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:32:29,697 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:32:29,697 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 03:32:29,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:32:29,697 INFO L85 PathProgramCache]: Analyzing trace with hash 28342, now seen corresponding path program 1 times [2022-11-23 03:32:29,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:32:29,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42006776] [2022-11-23 03:32:29,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:32:29,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:32:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:32:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:32:29,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:32:29,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42006776] [2022-11-23 03:32:29,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42006776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:32:29,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:32:29,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:32:29,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733890767] [2022-11-23 03:32:29,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:32:29,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:32:29,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:32:29,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:32:29,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:32:29,874 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 253 [2022-11-23 03:32:29,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:29,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:32:29,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 253 [2022-11-23 03:32:29,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:32:52,227 INFO L130 PetriNetUnfolder]: 177468/238689 cut-off events. [2022-11-23 03:32:52,227 INFO L131 PetriNetUnfolder]: For 25743/25743 co-relation queries the response was YES. [2022-11-23 03:32:52,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487066 conditions, 238689 events. 177468/238689 cut-off events. For 25743/25743 co-relation queries the response was YES. Maximal size of possible extension queue 4739. Compared 1548525 event pairs, 139794 based on Foata normal form. 0/163167 useless extension candidates. Maximal degree in co-relation 110128. Up to 233116 conditions per place. [2022-11-23 03:32:53,996 INFO L137 encePairwiseOnDemand]: 249/253 looper letters, 55 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2022-11-23 03:32:53,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 318 flow [2022-11-23 03:32:53,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:32:53,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:32:54,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2022-11-23 03:32:54,004 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47299077733860345 [2022-11-23 03:32:54,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2022-11-23 03:32:54,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2022-11-23 03:32:54,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:32:54,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2022-11-23 03:32:54,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:54,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:54,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:54,009 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 194 flow. Second operand 3 states and 359 transitions. [2022-11-23 03:32:54,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 318 flow [2022-11-23 03:32:54,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 63 transitions, 318 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 03:32:54,029 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 208 flow [2022-11-23 03:32:54,030 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=59, 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=208, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2022-11-23 03:32:54,031 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2022-11-23 03:32:54,031 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 208 flow [2022-11-23 03:32:54,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:54,031 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:32:54,031 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:32:54,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 03:32:54,032 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 03:32:54,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:32:54,033 INFO L85 PathProgramCache]: Analyzing trace with hash 28341, now seen corresponding path program 1 times [2022-11-23 03:32:54,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:32:54,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340571847] [2022-11-23 03:32:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:32:54,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:32:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:32:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:32:54,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:32:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340571847] [2022-11-23 03:32:54,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340571847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:32:54,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:32:54,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:32:54,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586288169] [2022-11-23 03:32:54,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:32:54,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:32:54,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:32:54,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:32:54,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:32:54,175 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 253 [2022-11-23 03:32:54,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:32:54,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:32:54,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 253 [2022-11-23 03:32:54,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand