./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 19:36:10,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:36:10,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:36:10,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:36:10,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:36:10,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:36:10,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:36:10,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:36:10,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:36:10,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:36:10,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:36:10,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:36:10,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:36:10,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:36:10,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:36:10,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:36:10,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:36:10,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:36:10,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:36:10,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:36:10,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:36:10,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:36:10,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:36:10,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:36:10,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:36:10,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:36:10,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:36:10,457 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:36:10,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:36:10,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:36:10,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:36:10,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:36:10,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:36:10,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:36:10,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:36:10,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:36:10,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:36:10,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:36:10,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:36:10,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:36:10,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:36:10,465 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 19:36:10,487 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:36:10,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:36:10,488 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:36:10,488 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:36:10,489 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:36:10,489 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:36:10,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:36:10,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:36:10,490 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:36:10,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:36:10,491 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:36:10,491 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:36:10,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:36:10,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:36:10,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:36:10,491 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 19:36:10,492 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 19:36:10,492 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 19:36:10,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:36:10,492 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 19:36:10,492 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:36:10,492 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:36:10,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:36:10,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:36:10,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:36:10,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:36:10,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:36:10,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:36:10,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:36:10,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:36:10,494 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:36:10,494 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:36:10,494 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:36:10,494 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:36:10,494 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_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 [2022-12-13 19:36:10,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:36:10,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:36:10,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:36:10,696 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:36:10,696 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:36:10,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2022-12-13 19:36:13,264 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:36:13,449 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:36:13,449 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2022-12-13 19:36:13,459 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/data/5ff21fa48/40ce4a7632d94c5d9e4354c236425cfd/FLAG87fb25c59 [2022-12-13 19:36:13,469 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/data/5ff21fa48/40ce4a7632d94c5d9e4354c236425cfd [2022-12-13 19:36:13,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:36:13,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:36:13,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:36:13,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:36:13,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:36:13,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:36:13" (1/1) ... [2022-12-13 19:36:13,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@535b24a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:13, skipping insertion in model container [2022-12-13 19:36:13,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:36:13" (1/1) ... [2022-12-13 19:36:13,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:36:13,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:36:13,695 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_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i[30287,30300] [2022-12-13 19:36:13,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:36:13,707 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:36:13,735 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_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i[30287,30300] [2022-12-13 19:36:13,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:36:13,756 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:36:13,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:13 WrapperNode [2022-12-13 19:36:13,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:36:13,757 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:36:13,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:36:13,757 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:36:13,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:13" (1/1) ... [2022-12-13 19:36:13,770 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:13" (1/1) ... [2022-12-13 19:36:13,782 INFO L138 Inliner]: procedures = 167, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 22 [2022-12-13 19:36:13,782 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:36:13,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:36:13,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:36:13,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:36:13,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:13" (1/1) ... [2022-12-13 19:36:13,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:13" (1/1) ... [2022-12-13 19:36:13,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:13" (1/1) ... [2022-12-13 19:36:13,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:13" (1/1) ... [2022-12-13 19:36:13,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:13" (1/1) ... [2022-12-13 19:36:13,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:13" (1/1) ... [2022-12-13 19:36:13,797 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:13" (1/1) ... [2022-12-13 19:36:13,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:13" (1/1) ... [2022-12-13 19:36:13,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:36:13,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:36:13,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:36:13,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:36:13,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:13" (1/1) ... [2022-12-13 19:36:13,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:36:13,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:36:13,824 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:36:13,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:36:13,850 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-13 19:36:13,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-13 19:36:13,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 19:36:13,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:36:13,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:36:13,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:36:13,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 19:36:13,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:36:13,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:36:13,852 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 19:36:13,934 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:36:13,936 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:36:14,062 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:36:14,068 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:36:14,068 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 19:36:14,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:36:14 BoogieIcfgContainer [2022-12-13 19:36:14,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:36:14,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:36:14,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:36:14,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:36:14,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:36:13" (1/3) ... [2022-12-13 19:36:14,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f381890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:36:14, skipping insertion in model container [2022-12-13 19:36:14,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:13" (2/3) ... [2022-12-13 19:36:14,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f381890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:36:14, skipping insertion in model container [2022-12-13 19:36:14,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:36:14" (3/3) ... [2022-12-13 19:36:14,078 INFO L112 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2022-12-13 19:36:14,099 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:36:14,099 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-12-13 19:36:14,099 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:36:14,165 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 19:36:14,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 74 transitions, 153 flow [2022-12-13 19:36:14,231 INFO L130 PetriNetUnfolder]: 10/90 cut-off events. [2022-12-13 19:36:14,231 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:36:14,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 90 events. 10/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 151 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2022-12-13 19:36:14,236 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 74 transitions, 153 flow [2022-12-13 19:36:14,240 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 74 transitions, 153 flow [2022-12-13 19:36:14,242 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:36:14,250 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 74 transitions, 153 flow [2022-12-13 19:36:14,252 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 74 transitions, 153 flow [2022-12-13 19:36:14,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 74 transitions, 153 flow [2022-12-13 19:36:14,274 INFO L130 PetriNetUnfolder]: 10/90 cut-off events. [2022-12-13 19:36:14,274 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:36:14,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 90 events. 10/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 151 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2022-12-13 19:36:14,276 INFO L119 LiptonReduction]: Number of co-enabled transitions 1520 [2022-12-13 19:36:15,727 INFO L134 LiptonReduction]: Checked pairs total: 1181 [2022-12-13 19:36:15,727 INFO L136 LiptonReduction]: Total number of compositions: 65 [2022-12-13 19:36:15,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:36:15,742 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;@674e0b22, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:36:15,742 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 19:36:15,744 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 19:36:15,744 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:36:15,744 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:15,744 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:36:15,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-13 19:36:15,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:15,748 INFO L85 PathProgramCache]: Analyzing trace with hash 10417, now seen corresponding path program 1 times [2022-12-13 19:36:15,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:36:15,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471696373] [2022-12-13 19:36:15,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:15,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:36:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:36:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:36:15,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:36:15,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471696373] [2022-12-13 19:36:15,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471696373] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:36:15,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:36:15,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:36:15,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909358226] [2022-12-13 19:36:15,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:36:15,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 19:36:15,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:36:15,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 19:36:15,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 19:36:15,877 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 139 [2022-12-13 19:36:15,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 20 transitions, 45 flow. Second operand has 2 states, 2 states have (on average 67.0) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:15,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:36:15,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 139 [2022-12-13 19:36:15,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:36:15,914 INFO L130 PetriNetUnfolder]: 40/80 cut-off events. [2022-12-13 19:36:15,914 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:36:15,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 80 events. 40/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 218 event pairs, 20 based on Foata normal form. 5/46 useless extension candidates. Maximal degree in co-relation 143. Up to 75 conditions per place. [2022-12-13 19:36:15,915 INFO L137 encePairwiseOnDemand]: 136/139 looper letters, 15 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2022-12-13 19:36:15,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 17 transitions, 69 flow [2022-12-13 19:36:15,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 19:36:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 19:36:15,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 150 transitions. [2022-12-13 19:36:15,924 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.539568345323741 [2022-12-13 19:36:15,925 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 150 transitions. [2022-12-13 19:36:15,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 150 transitions. [2022-12-13 19:36:15,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:36:15,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 150 transitions. [2022-12-13 19:36:15,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:15,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:15,933 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:15,934 INFO L175 Difference]: Start difference. First operand has 18 places, 20 transitions, 45 flow. Second operand 2 states and 150 transitions. [2022-12-13 19:36:15,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 17 transitions, 69 flow [2022-12-13 19:36:15,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:36:15,937 INFO L231 Difference]: Finished difference. Result has 17 places, 17 transitions, 39 flow [2022-12-13 19:36:15,938 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=39, PETRI_PLACES=17, PETRI_TRANSITIONS=17} [2022-12-13 19:36:15,941 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, -1 predicate places. [2022-12-13 19:36:15,941 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 17 transitions, 39 flow [2022-12-13 19:36:15,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 67.0) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:15,941 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:15,942 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:36:15,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 19:36:15,942 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-13 19:36:15,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:15,942 INFO L85 PathProgramCache]: Analyzing trace with hash 10428, now seen corresponding path program 1 times [2022-12-13 19:36:15,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:36:15,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305788757] [2022-12-13 19:36:15,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:15,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:36:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:36:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:36:16,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:36:16,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305788757] [2022-12-13 19:36:16,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305788757] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:36:16,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:36:16,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:36:16,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598587525] [2022-12-13 19:36:16,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:36:16,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:36:16,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:36:16,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:36:16,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:36:16,040 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 139 [2022-12-13 19:36:16,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 17 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:16,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:36:16,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 139 [2022-12-13 19:36:16,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:36:16,070 INFO L130 PetriNetUnfolder]: 31/63 cut-off events. [2022-12-13 19:36:16,070 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:36:16,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 63 events. 31/63 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 155 event pairs, 15 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 124. Up to 58 conditions per place. [2022-12-13 19:36:16,070 INFO L137 encePairwiseOnDemand]: 137/139 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2022-12-13 19:36:16,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 16 transitions, 65 flow [2022-12-13 19:36:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:36:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:36:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2022-12-13 19:36:16,072 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4748201438848921 [2022-12-13 19:36:16,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 198 transitions. [2022-12-13 19:36:16,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 198 transitions. [2022-12-13 19:36:16,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:36:16,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 198 transitions. [2022-12-13 19:36:16,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:16,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:16,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:16,074 INFO L175 Difference]: Start difference. First operand has 17 places, 17 transitions, 39 flow. Second operand 3 states and 198 transitions. [2022-12-13 19:36:16,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 16 transitions, 65 flow [2022-12-13 19:36:16,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 16 transitions, 65 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:36:16,075 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 39 flow [2022-12-13 19:36:16,075 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2022-12-13 19:36:16,075 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 0 predicate places. [2022-12-13 19:36:16,076 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 39 flow [2022-12-13 19:36:16,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:16,076 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:16,076 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:36:16,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 19:36:16,076 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-13 19:36:16,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:16,077 INFO L85 PathProgramCache]: Analyzing trace with hash 10427, now seen corresponding path program 1 times [2022-12-13 19:36:16,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:36:16,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916443674] [2022-12-13 19:36:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:16,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:36:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:36:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:36:16,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:36:16,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916443674] [2022-12-13 19:36:16,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916443674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:36:16,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:36:16,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:36:16,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357159228] [2022-12-13 19:36:16,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:36:16,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:36:16,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:36:16,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:36:16,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:36:16,128 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 139 [2022-12-13 19:36:16,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:16,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:36:16,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 139 [2022-12-13 19:36:16,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:36:16,148 INFO L130 PetriNetUnfolder]: 22/46 cut-off events. [2022-12-13 19:36:16,148 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:36:16,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 46 events. 22/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 96 event pairs, 10 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 92. Up to 42 conditions per place. [2022-12-13 19:36:16,149 INFO L137 encePairwiseOnDemand]: 137/139 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2022-12-13 19:36:16,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 15 transitions, 63 flow [2022-12-13 19:36:16,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:36:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:36:16,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 194 transitions. [2022-12-13 19:36:16,150 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46522781774580335 [2022-12-13 19:36:16,150 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 194 transitions. [2022-12-13 19:36:16,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 194 transitions. [2022-12-13 19:36:16,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:36:16,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 194 transitions. [2022-12-13 19:36:16,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:16,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:16,153 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:16,153 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 39 flow. Second operand 3 states and 194 transitions. [2022-12-13 19:36:16,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 15 transitions, 63 flow [2022-12-13 19:36:16,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 15 transitions, 62 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:36:16,153 INFO L231 Difference]: Finished difference. Result has 18 places, 15 transitions, 38 flow [2022-12-13 19:36:16,153 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=18, PETRI_TRANSITIONS=15} [2022-12-13 19:36:16,154 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 0 predicate places. [2022-12-13 19:36:16,154 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 15 transitions, 38 flow [2022-12-13 19:36:16,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:16,154 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:16,154 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 19:36:16,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 19:36:16,155 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-13 19:36:16,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:16,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1045834202, now seen corresponding path program 1 times [2022-12-13 19:36:16,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:36:16,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740496915] [2022-12-13 19:36:16,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:16,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:36:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:36:16,167 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 19:36:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:36:16,186 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 19:36:16,186 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 19:36:16,187 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-13 19:36:16,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2022-12-13 19:36:16,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2022-12-13 19:36:16,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2022-12-13 19:36:16,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2022-12-13 19:36:16,189 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2022-12-13 19:36:16,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 19:36:16,189 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 19:36:16,191 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 19:36:16,191 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 19:36:16,213 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 19:36:16,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 115 transitions, 242 flow [2022-12-13 19:36:16,238 INFO L130 PetriNetUnfolder]: 19/149 cut-off events. [2022-12-13 19:36:16,238 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:36:16,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 149 events. 19/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 371 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2022-12-13 19:36:16,239 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 115 transitions, 242 flow [2022-12-13 19:36:16,241 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 115 transitions, 242 flow [2022-12-13 19:36:16,241 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:36:16,241 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 115 transitions, 242 flow [2022-12-13 19:36:16,241 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 115 transitions, 242 flow [2022-12-13 19:36:16,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 115 transitions, 242 flow [2022-12-13 19:36:16,257 INFO L130 PetriNetUnfolder]: 19/149 cut-off events. [2022-12-13 19:36:16,257 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:36:16,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 149 events. 19/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 371 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2022-12-13 19:36:16,261 INFO L119 LiptonReduction]: Number of co-enabled transitions 6320 [2022-12-13 19:36:18,215 INFO L134 LiptonReduction]: Checked pairs total: 4688 [2022-12-13 19:36:18,215 INFO L136 LiptonReduction]: Total number of compositions: 99 [2022-12-13 19:36:18,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:36:18,217 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;@674e0b22, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:36:18,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 19:36:18,218 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 19:36:18,218 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:36:18,218 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:18,218 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:36:18,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 19:36:18,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:18,218 INFO L85 PathProgramCache]: Analyzing trace with hash 18537, now seen corresponding path program 1 times [2022-12-13 19:36:18,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:36:18,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831033854] [2022-12-13 19:36:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:18,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:36:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:36:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:36:18,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:36:18,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831033854] [2022-12-13 19:36:18,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831033854] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:36:18,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:36:18,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:36:18,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544057078] [2022-12-13 19:36:18,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:36:18,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 19:36:18,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:36:18,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 19:36:18,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 19:36:18,230 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 214 [2022-12-13 19:36:18,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 33 transitions, 78 flow. Second operand has 2 states, 2 states have (on average 102.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:18,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:36:18,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 214 [2022-12-13 19:36:18,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:36:18,300 INFO L130 PetriNetUnfolder]: 433/653 cut-off events. [2022-12-13 19:36:18,300 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-12-13 19:36:18,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1294 conditions, 653 events. 433/653 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2801 event pairs, 225 based on Foata normal form. 52/349 useless extension candidates. Maximal degree in co-relation 258. Up to 606 conditions per place. [2022-12-13 19:36:18,303 INFO L137 encePairwiseOnDemand]: 210/214 looper letters, 24 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2022-12-13 19:36:18,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 118 flow [2022-12-13 19:36:18,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 19:36:18,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 19:36:18,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 230 transitions. [2022-12-13 19:36:18,304 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5373831775700935 [2022-12-13 19:36:18,304 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 230 transitions. [2022-12-13 19:36:18,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 230 transitions. [2022-12-13 19:36:18,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:36:18,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 230 transitions. [2022-12-13 19:36:18,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 115.0) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:18,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:18,306 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:18,306 INFO L175 Difference]: Start difference. First operand has 28 places, 33 transitions, 78 flow. Second operand 2 states and 230 transitions. [2022-12-13 19:36:18,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 118 flow [2022-12-13 19:36:18,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 29 transitions, 116 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 19:36:18,307 INFO L231 Difference]: Finished difference. Result has 27 places, 29 transitions, 68 flow [2022-12-13 19:36:18,307 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=68, PETRI_PLACES=27, PETRI_TRANSITIONS=29} [2022-12-13 19:36:18,308 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2022-12-13 19:36:18,308 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 29 transitions, 68 flow [2022-12-13 19:36:18,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 102.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:18,308 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:18,308 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:36:18,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 19:36:18,308 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 19:36:18,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:18,309 INFO L85 PathProgramCache]: Analyzing trace with hash 18554, now seen corresponding path program 1 times [2022-12-13 19:36:18,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:36:18,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582138894] [2022-12-13 19:36:18,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:18,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:36:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:36:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:36:18,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:36:18,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582138894] [2022-12-13 19:36:18,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582138894] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:36:18,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:36:18,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:36:18,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718489107] [2022-12-13 19:36:18,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:36:18,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:36:18,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:36:18,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:36:18,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:36:18,371 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 214 [2022-12-13 19:36:18,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 29 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:18,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:36:18,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 214 [2022-12-13 19:36:18,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:36:18,434 INFO L130 PetriNetUnfolder]: 316/486 cut-off events. [2022-12-13 19:36:18,434 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 19:36:18,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 962 conditions, 486 events. 316/486 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 1943 event pairs, 160 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 957. Up to 445 conditions per place. [2022-12-13 19:36:18,436 INFO L137 encePairwiseOnDemand]: 212/214 looper letters, 22 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2022-12-13 19:36:18,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 28 transitions, 112 flow [2022-12-13 19:36:18,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:36:18,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:36:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2022-12-13 19:36:18,437 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49065420560747663 [2022-12-13 19:36:18,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2022-12-13 19:36:18,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2022-12-13 19:36:18,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:36:18,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2022-12-13 19:36:18,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:18,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:18,440 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:18,440 INFO L175 Difference]: Start difference. First operand has 27 places, 29 transitions, 68 flow. Second operand 3 states and 315 transitions. [2022-12-13 19:36:18,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 28 transitions, 112 flow [2022-12-13 19:36:18,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 112 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:36:18,441 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 68 flow [2022-12-13 19:36:18,441 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2022-12-13 19:36:18,441 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2022-12-13 19:36:18,442 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 68 flow [2022-12-13 19:36:18,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:18,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:18,442 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:36:18,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 19:36:18,442 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 19:36:18,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:18,442 INFO L85 PathProgramCache]: Analyzing trace with hash 18553, now seen corresponding path program 1 times [2022-12-13 19:36:18,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:36:18,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152172415] [2022-12-13 19:36:18,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:18,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:36:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:36:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:36:18,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:36:18,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152172415] [2022-12-13 19:36:18,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152172415] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:36:18,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:36:18,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:36:18,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514847320] [2022-12-13 19:36:18,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:36:18,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:36:18,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:36:18,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:36:18,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:36:18,479 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 214 [2022-12-13 19:36:18,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:18,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:36:18,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 214 [2022-12-13 19:36:18,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:36:18,535 INFO L130 PetriNetUnfolder]: 199/319 cut-off events. [2022-12-13 19:36:18,535 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 19:36:18,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 637 conditions, 319 events. 199/319 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1154 event pairs, 95 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 631. Up to 285 conditions per place. [2022-12-13 19:36:18,537 INFO L137 encePairwiseOnDemand]: 212/214 looper letters, 21 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2022-12-13 19:36:18,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 110 flow [2022-12-13 19:36:18,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:36:18,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:36:18,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2022-12-13 19:36:18,538 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4797507788161994 [2022-12-13 19:36:18,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 308 transitions. [2022-12-13 19:36:18,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 308 transitions. [2022-12-13 19:36:18,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:36:18,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 308 transitions. [2022-12-13 19:36:18,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:18,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:18,542 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:18,542 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 68 flow. Second operand 3 states and 308 transitions. [2022-12-13 19:36:18,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 110 flow [2022-12-13 19:36:18,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 109 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:36:18,543 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 67 flow [2022-12-13 19:36:18,543 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2022-12-13 19:36:18,544 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2022-12-13 19:36:18,544 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 67 flow [2022-12-13 19:36:18,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:18,544 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:18,544 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:36:18,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 19:36:18,545 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 19:36:18,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:18,545 INFO L85 PathProgramCache]: Analyzing trace with hash -32729510, now seen corresponding path program 1 times [2022-12-13 19:36:18,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:36:18,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071841260] [2022-12-13 19:36:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:18,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:36:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:36:18,570 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 19:36:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:36:18,589 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 19:36:18,589 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 19:36:18,589 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 7 remaining) [2022-12-13 19:36:18,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2022-12-13 19:36:18,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 19:36:18,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 19:36:18,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2022-12-13 19:36:18,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2022-12-13 19:36:18,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 19:36:18,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 19:36:18,590 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 19:36:18,594 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2022-12-13 19:36:18,594 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 19:36:18,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 07:36:18 BasicIcfg [2022-12-13 19:36:18,614 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 19:36:18,614 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 19:36:18,614 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 19:36:18,614 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 19:36:18,615 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:36:14" (3/4) ... [2022-12-13 19:36:18,617 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-13 19:36:18,618 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 19:36:18,618 INFO L158 Benchmark]: Toolchain (without parser) took 5146.11ms. Allocated memory was 119.5MB in the beginning and 165.7MB in the end (delta: 46.1MB). Free memory was 82.2MB in the beginning and 55.6MB in the end (delta: 26.6MB). Peak memory consumption was 73.1MB. Max. memory is 16.1GB. [2022-12-13 19:36:18,619 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 119.5MB. Free memory was 85.7MB in the beginning and 85.7MB in the end (delta: 24.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 19:36:18,619 INFO L158 Benchmark]: CACSL2BoogieTranslator took 283.55ms. Allocated memory is still 119.5MB. Free memory was 81.8MB in the beginning and 62.8MB in the end (delta: 19.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-12-13 19:36:18,619 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.11ms. Allocated memory is still 119.5MB. Free memory was 62.8MB in the beginning and 60.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 19:36:18,619 INFO L158 Benchmark]: Boogie Preprocessor took 16.60ms. Allocated memory is still 119.5MB. Free memory was 60.8MB in the beginning and 59.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 19:36:18,620 INFO L158 Benchmark]: RCFGBuilder took 270.21ms. Allocated memory is still 119.5MB. Free memory was 59.6MB in the beginning and 46.6MB in the end (delta: 13.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-13 19:36:18,620 INFO L158 Benchmark]: TraceAbstraction took 4541.72ms. Allocated memory was 119.5MB in the beginning and 165.7MB in the end (delta: 46.1MB). Free memory was 46.1MB in the beginning and 55.6MB in the end (delta: -9.5MB). Peak memory consumption was 37.5MB. Max. memory is 16.1GB. [2022-12-13 19:36:18,620 INFO L158 Benchmark]: Witness Printer took 3.59ms. Allocated memory is still 165.7MB. Free memory is still 55.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 19:36:18,622 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 119.5MB. Free memory was 85.7MB in the beginning and 85.7MB in the end (delta: 24.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 283.55ms. Allocated memory is still 119.5MB. Free memory was 81.8MB in the beginning and 62.8MB in the end (delta: 19.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.11ms. Allocated memory is still 119.5MB. Free memory was 62.8MB in the beginning and 60.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.60ms. Allocated memory is still 119.5MB. Free memory was 60.8MB in the beginning and 59.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 270.21ms. Allocated memory is still 119.5MB. Free memory was 59.6MB in the beginning and 46.6MB in the end (delta: 13.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 4541.72ms. Allocated memory was 119.5MB in the beginning and 165.7MB in the end (delta: 46.1MB). Free memory was 46.1MB in the beginning and 55.6MB in the end (delta: -9.5MB). Peak memory consumption was 37.5MB. Max. memory is 16.1GB. * Witness Printer took 3.59ms. Allocated memory is still 165.7MB. Free memory is still 55.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.5s, 68 PlacesBefore, 18 PlacesAfterwards, 74 TransitionsBefore, 20 TransitionsAfterwards, 1520 CoEnabledTransitionPairs, 5 FixpointIterations, 13 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 4 ChoiceCompositions, 65 TotalNumberOfCompositions, 1181 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1181, independent: 1181, independent conditional: 0, independent unconditional: 1181, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 724, independent: 724, independent conditional: 0, independent unconditional: 724, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1181, independent: 457, independent conditional: 0, independent unconditional: 457, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 724, unknown conditional: 0, unknown unconditional: 724] , Statistics on independence cache: Total cache size (in pairs): 11, Positive cache size: 11, Positive conditional cache size: 0, Positive unconditional cache size: 11, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 103 PlacesBefore, 28 PlacesAfterwards, 115 TransitionsBefore, 33 TransitionsAfterwards, 6320 CoEnabledTransitionPairs, 5 FixpointIterations, 13 TrivialSequentialCompositions, 62 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 17 ConcurrentYvCompositions, 7 ChoiceCompositions, 99 TotalNumberOfCompositions, 4688 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4688, independent: 4688, independent conditional: 0, independent unconditional: 4688, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3016, independent: 3016, independent conditional: 0, independent unconditional: 3016, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4688, independent: 1672, independent conditional: 0, independent unconditional: 1672, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 3016, unknown conditional: 0, unknown unconditional: 3016] , Statistics on independence cache: Total cache size (in pairs): 33, Positive cache size: 33, Positive conditional cache size: 0, Positive unconditional cache size: 33, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 695]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 695. Possible FailurePath: [L700] 0 pthread_t t; VAL [t={3:0}] [L701] COND TRUE 0 1 [L703] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [arg={0:0}, pthread_create(&t, 0, thr1, 0)=-1, t={3:0}] [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L687] 1 int i, j=1, k=1; [L688] 1 i=0 VAL [arg={0:0}, arg={0:0}, i=0, j=1, k=1, x=0, y=4294967301, z=5] [L688] COND FALSE 1 !(i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 [2022-12-13 19:36:20,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:36:20,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:36:20,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:36:20,467 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:36:20,467 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:36:20,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2022-12-13 19:36:23,039 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:36:23,192 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:36:23,193 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2022-12-13 19:36:23,201 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/data/22c483cfe/071431fbc7e44b2f9ec0c24bb83406af/FLAG6e1351412 [2022-12-13 19:36:23,212 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/data/22c483cfe/071431fbc7e44b2f9ec0c24bb83406af [2022-12-13 19:36:23,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:36:23,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:36:23,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:36:23,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:36:23,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:36:23,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:36:23" (1/1) ... [2022-12-13 19:36:23,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@676b4169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:23, skipping insertion in model container [2022-12-13 19:36:23,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:36:23" (1/1) ... [2022-12-13 19:36:23,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:36:23,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:36:23,529 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_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i[30287,30300] [2022-12-13 19:36:23,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:36:23,549 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:36:23,584 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_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i[30287,30300] [2022-12-13 19:36:23,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:36:23,623 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:36:23,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:23 WrapperNode [2022-12-13 19:36:23,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:36:23,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:36:23,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:36:23,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:36:23,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:23" (1/1) ... [2022-12-13 19:36:23,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:23" (1/1) ... [2022-12-13 19:36:23,654 INFO L138 Inliner]: procedures = 170, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2022-12-13 19:36:23,655 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:36:23,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:36:23,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:36:23,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:36:23,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:23" (1/1) ... [2022-12-13 19:36:23,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:23" (1/1) ... [2022-12-13 19:36:23,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:23" (1/1) ... [2022-12-13 19:36:23,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:23" (1/1) ... [2022-12-13 19:36:23,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:23" (1/1) ... [2022-12-13 19:36:23,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:23" (1/1) ... [2022-12-13 19:36:23,672 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:23" (1/1) ... [2022-12-13 19:36:23,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:23" (1/1) ... [2022-12-13 19:36:23,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:36:23,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:36:23,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:36:23,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:36:23,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:23" (1/1) ... [2022-12-13 19:36:23,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:36:23,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:36:23,699 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:36:23,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:36:23,735 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-13 19:36:23,735 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-13 19:36:23,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:36:23,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:36:23,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:36:23,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 19:36:23,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 19:36:23,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:36:23,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:36:23,738 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 19:36:23,847 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:36:23,849 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:36:23,988 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:36:23,993 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:36:23,993 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 19:36:23,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:36:23 BoogieIcfgContainer [2022-12-13 19:36:23,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:36:23,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:36:23,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:36:23,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:36:23,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:36:23" (1/3) ... [2022-12-13 19:36:23,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468a1cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:36:23, skipping insertion in model container [2022-12-13 19:36:23,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:36:23" (2/3) ... [2022-12-13 19:36:24,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468a1cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:36:24, skipping insertion in model container [2022-12-13 19:36:24,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:36:23" (3/3) ... [2022-12-13 19:36:24,001 INFO L112 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2022-12-13 19:36:24,015 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:36:24,015 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-12-13 19:36:24,015 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:36:24,060 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 19:36:24,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 75 transitions, 155 flow [2022-12-13 19:36:24,114 INFO L130 PetriNetUnfolder]: 10/91 cut-off events. [2022-12-13 19:36:24,114 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:36:24,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 91 events. 10/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 148 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2022-12-13 19:36:24,118 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 75 transitions, 155 flow [2022-12-13 19:36:24,121 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 75 transitions, 155 flow [2022-12-13 19:36:24,124 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:36:24,131 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 75 transitions, 155 flow [2022-12-13 19:36:24,133 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 75 transitions, 155 flow [2022-12-13 19:36:24,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 75 transitions, 155 flow [2022-12-13 19:36:24,149 INFO L130 PetriNetUnfolder]: 10/91 cut-off events. [2022-12-13 19:36:24,149 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:36:24,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 91 events. 10/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 148 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2022-12-13 19:36:24,150 INFO L119 LiptonReduction]: Number of co-enabled transitions 1520 [2022-12-13 19:36:26,588 INFO L134 LiptonReduction]: Checked pairs total: 1173 [2022-12-13 19:36:26,588 INFO L136 LiptonReduction]: Total number of compositions: 66 [2022-12-13 19:36:26,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:36:26,603 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;@3e8b753b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:36:26,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 19:36:26,604 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 19:36:26,604 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:36:26,604 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:26,605 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:36:26,605 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-13 19:36:26,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:26,608 INFO L85 PathProgramCache]: Analyzing trace with hash 10516, now seen corresponding path program 1 times [2022-12-13 19:36:26,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:36:26,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575553442] [2022-12-13 19:36:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:26,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:36:26,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:36:26,618 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:36:26,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 19:36:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:36:26,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 19:36:26,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:36:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:36:26,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:36:26,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:36:26,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575553442] [2022-12-13 19:36:26,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575553442] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:36:26,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:36:26,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:36:26,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370103750] [2022-12-13 19:36:26,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:36:26,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 19:36:26,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:36:26,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 19:36:26,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 19:36:26,702 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 141 [2022-12-13 19:36:26,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 20 transitions, 45 flow. Second operand has 2 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:26,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:36:26,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 141 [2022-12-13 19:36:26,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:36:26,751 INFO L130 PetriNetUnfolder]: 40/81 cut-off events. [2022-12-13 19:36:26,751 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:36:26,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 81 events. 40/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 231 event pairs, 20 based on Foata normal form. 5/47 useless extension candidates. Maximal degree in co-relation 143. Up to 75 conditions per place. [2022-12-13 19:36:26,753 INFO L137 encePairwiseOnDemand]: 138/141 looper letters, 15 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2022-12-13 19:36:26,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 17 transitions, 69 flow [2022-12-13 19:36:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 19:36:26,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 19:36:26,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2022-12-13 19:36:26,762 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2022-12-13 19:36:26,763 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2022-12-13 19:36:26,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2022-12-13 19:36:26,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:36:26,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2022-12-13 19:36:26,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:26,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:26,771 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:26,772 INFO L175 Difference]: Start difference. First operand has 18 places, 20 transitions, 45 flow. Second operand 2 states and 152 transitions. [2022-12-13 19:36:26,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 17 transitions, 69 flow [2022-12-13 19:36:26,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:36:26,775 INFO L231 Difference]: Finished difference. Result has 17 places, 17 transitions, 39 flow [2022-12-13 19:36:26,776 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=39, PETRI_PLACES=17, PETRI_TRANSITIONS=17} [2022-12-13 19:36:26,779 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, -1 predicate places. [2022-12-13 19:36:26,779 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 17 transitions, 39 flow [2022-12-13 19:36:26,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:26,779 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:26,779 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:36:26,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:36:26,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:36:26,982 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-13 19:36:26,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:26,984 INFO L85 PathProgramCache]: Analyzing trace with hash 10521, now seen corresponding path program 1 times [2022-12-13 19:36:26,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:36:26,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300817747] [2022-12-13 19:36:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:26,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:36:26,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:36:26,990 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:36:26,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 19:36:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:36:27,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:36:27,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:36:27,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 19:36:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:36:27,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:36:27,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:36:27,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300817747] [2022-12-13 19:36:27,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300817747] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:36:27,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:36:27,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:36:27,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900763022] [2022-12-13 19:36:27,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:36:27,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:36:27,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:36:27,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:36:27,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:36:27,180 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2022-12-13 19:36:27,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 17 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:27,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:36:27,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2022-12-13 19:36:27,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:36:27,221 INFO L130 PetriNetUnfolder]: 31/64 cut-off events. [2022-12-13 19:36:27,222 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:36:27,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 64 events. 31/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 167 event pairs, 15 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 126. Up to 58 conditions per place. [2022-12-13 19:36:27,223 INFO L137 encePairwiseOnDemand]: 139/141 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2022-12-13 19:36:27,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 16 transitions, 65 flow [2022-12-13 19:36:27,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:36:27,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:36:27,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2022-12-13 19:36:27,225 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46808510638297873 [2022-12-13 19:36:27,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 198 transitions. [2022-12-13 19:36:27,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 198 transitions. [2022-12-13 19:36:27,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:36:27,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 198 transitions. [2022-12-13 19:36:27,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:27,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:27,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:27,229 INFO L175 Difference]: Start difference. First operand has 17 places, 17 transitions, 39 flow. Second operand 3 states and 198 transitions. [2022-12-13 19:36:27,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 16 transitions, 65 flow [2022-12-13 19:36:27,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 16 transitions, 65 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:36:27,230 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 39 flow [2022-12-13 19:36:27,231 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2022-12-13 19:36:27,231 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 0 predicate places. [2022-12-13 19:36:27,231 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 39 flow [2022-12-13 19:36:27,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:27,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:27,232 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:36:27,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 19:36:27,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:36:27,434 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-13 19:36:27,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:27,436 INFO L85 PathProgramCache]: Analyzing trace with hash 10522, now seen corresponding path program 1 times [2022-12-13 19:36:27,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:36:27,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993543526] [2022-12-13 19:36:27,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:27,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:36:27,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:36:27,441 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:36:27,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 19:36:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:36:27,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:36:27,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:36:27,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 19:36:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:36:27,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:36:27,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:36:27,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993543526] [2022-12-13 19:36:27,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993543526] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:36:27,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:36:27,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:36:27,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076662416] [2022-12-13 19:36:27,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:36:27,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:36:27,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:36:27,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:36:27,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:36:27,558 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 141 [2022-12-13 19:36:27,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:27,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:36:27,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 141 [2022-12-13 19:36:27,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:36:27,597 INFO L130 PetriNetUnfolder]: 22/47 cut-off events. [2022-12-13 19:36:27,597 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:36:27,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 47 events. 22/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 110 event pairs, 10 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 94. Up to 42 conditions per place. [2022-12-13 19:36:27,598 INFO L137 encePairwiseOnDemand]: 139/141 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2022-12-13 19:36:27,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 15 transitions, 63 flow [2022-12-13 19:36:27,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:36:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:36:27,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 203 transitions. [2022-12-13 19:36:27,601 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4799054373522459 [2022-12-13 19:36:27,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 203 transitions. [2022-12-13 19:36:27,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 203 transitions. [2022-12-13 19:36:27,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:36:27,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 203 transitions. [2022-12-13 19:36:27,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:27,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:27,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:27,604 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 39 flow. Second operand 3 states and 203 transitions. [2022-12-13 19:36:27,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 15 transitions, 63 flow [2022-12-13 19:36:27,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 15 transitions, 62 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:36:27,605 INFO L231 Difference]: Finished difference. Result has 18 places, 15 transitions, 38 flow [2022-12-13 19:36:27,605 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=18, PETRI_TRANSITIONS=15} [2022-12-13 19:36:27,606 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 0 predicate places. [2022-12-13 19:36:27,606 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 15 transitions, 38 flow [2022-12-13 19:36:27,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:27,606 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:27,606 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 19:36:27,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 19:36:27,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:36:27,808 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-13 19:36:27,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:27,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1132708635, now seen corresponding path program 1 times [2022-12-13 19:36:27,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:36:27,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311671149] [2022-12-13 19:36:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:27,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:36:27,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:36:27,811 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:36:27,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 19:36:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:36:27,927 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 19:36:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:36:27,955 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-12-13 19:36:27,955 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 19:36:27,956 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-13 19:36:27,957 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2022-12-13 19:36:27,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2022-12-13 19:36:27,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2022-12-13 19:36:27,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2022-12-13 19:36:27,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2022-12-13 19:36:27,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 19:36:28,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:36:28,160 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 19:36:28,163 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 19:36:28,163 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 19:36:28,189 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 19:36:28,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 116 transitions, 244 flow [2022-12-13 19:36:28,215 INFO L130 PetriNetUnfolder]: 19/150 cut-off events. [2022-12-13 19:36:28,215 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:36:28,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 150 events. 19/150 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 363 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2022-12-13 19:36:28,216 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 116 transitions, 244 flow [2022-12-13 19:36:28,217 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 116 transitions, 244 flow [2022-12-13 19:36:28,218 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:36:28,218 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 116 transitions, 244 flow [2022-12-13 19:36:28,218 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 116 transitions, 244 flow [2022-12-13 19:36:28,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 116 transitions, 244 flow [2022-12-13 19:36:28,238 INFO L130 PetriNetUnfolder]: 19/150 cut-off events. [2022-12-13 19:36:28,238 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:36:28,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 150 events. 19/150 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 363 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2022-12-13 19:36:28,241 INFO L119 LiptonReduction]: Number of co-enabled transitions 6320 [2022-12-13 19:36:31,872 INFO L134 LiptonReduction]: Checked pairs total: 4716 [2022-12-13 19:36:31,873 INFO L136 LiptonReduction]: Total number of compositions: 100 [2022-12-13 19:36:31,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:36:31,874 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;@3e8b753b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:36:31,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 19:36:31,875 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 19:36:31,875 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:36:31,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:31,876 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:36:31,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 19:36:31,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:31,876 INFO L85 PathProgramCache]: Analyzing trace with hash 18729, now seen corresponding path program 1 times [2022-12-13 19:36:31,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:36:31,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384041668] [2022-12-13 19:36:31,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:31,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:36:31,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:36:31,878 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:36:31,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 19:36:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:36:31,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 19:36:31,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:36:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:36:31,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:36:31,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:36:31,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384041668] [2022-12-13 19:36:31,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384041668] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:36:31,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:36:31,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:36:31,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410726874] [2022-12-13 19:36:31,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:36:31,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 19:36:31,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:36:31,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 19:36:31,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 19:36:31,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 216 [2022-12-13 19:36:31,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 33 transitions, 78 flow. Second operand has 2 states, 2 states have (on average 103.0) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:31,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:36:31,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 216 [2022-12-13 19:36:31,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:36:32,005 INFO L130 PetriNetUnfolder]: 433/653 cut-off events. [2022-12-13 19:36:32,006 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-12-13 19:36:32,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1294 conditions, 653 events. 433/653 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 2848 event pairs, 225 based on Foata normal form. 52/352 useless extension candidates. Maximal degree in co-relation 258. Up to 606 conditions per place. [2022-12-13 19:36:32,009 INFO L137 encePairwiseOnDemand]: 212/216 looper letters, 24 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2022-12-13 19:36:32,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 118 flow [2022-12-13 19:36:32,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 19:36:32,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 19:36:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 232 transitions. [2022-12-13 19:36:32,010 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2022-12-13 19:36:32,010 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 232 transitions. [2022-12-13 19:36:32,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 232 transitions. [2022-12-13 19:36:32,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:36:32,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 232 transitions. [2022-12-13 19:36:32,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 116.0) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:32,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:32,013 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:32,013 INFO L175 Difference]: Start difference. First operand has 28 places, 33 transitions, 78 flow. Second operand 2 states and 232 transitions. [2022-12-13 19:36:32,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 118 flow [2022-12-13 19:36:32,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 29 transitions, 116 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 19:36:32,014 INFO L231 Difference]: Finished difference. Result has 27 places, 29 transitions, 68 flow [2022-12-13 19:36:32,014 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=68, PETRI_PLACES=27, PETRI_TRANSITIONS=29} [2022-12-13 19:36:32,014 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2022-12-13 19:36:32,014 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 29 transitions, 68 flow [2022-12-13 19:36:32,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 103.0) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:32,015 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:32,015 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:36:32,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-12-13 19:36:32,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:36:32,215 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 19:36:32,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:32,216 INFO L85 PathProgramCache]: Analyzing trace with hash 18743, now seen corresponding path program 1 times [2022-12-13 19:36:32,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:36:32,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738803201] [2022-12-13 19:36:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:32,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:36:32,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:36:32,217 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:36:32,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 19:36:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:36:32,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:36:32,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:36:32,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 19:36:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:36:32,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:36:32,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:36:32,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738803201] [2022-12-13 19:36:32,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738803201] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:36:32,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:36:32,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:36:32,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560830219] [2022-12-13 19:36:32,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:36:32,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:36:32,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:36:32,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:36:32,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:36:32,287 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 216 [2022-12-13 19:36:32,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 29 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:32,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:36:32,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 216 [2022-12-13 19:36:32,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:36:32,359 INFO L130 PetriNetUnfolder]: 316/486 cut-off events. [2022-12-13 19:36:32,359 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 19:36:32,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 962 conditions, 486 events. 316/486 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 1987 event pairs, 160 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 957. Up to 445 conditions per place. [2022-12-13 19:36:32,361 INFO L137 encePairwiseOnDemand]: 214/216 looper letters, 22 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2022-12-13 19:36:32,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 28 transitions, 112 flow [2022-12-13 19:36:32,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:36:32,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:36:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2022-12-13 19:36:32,363 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2022-12-13 19:36:32,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2022-12-13 19:36:32,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2022-12-13 19:36:32,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:36:32,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2022-12-13 19:36:32,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:32,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:32,366 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:32,366 INFO L175 Difference]: Start difference. First operand has 27 places, 29 transitions, 68 flow. Second operand 3 states and 318 transitions. [2022-12-13 19:36:32,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 28 transitions, 112 flow [2022-12-13 19:36:32,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 112 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:36:32,367 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 68 flow [2022-12-13 19:36:32,367 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2022-12-13 19:36:32,367 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2022-12-13 19:36:32,368 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 68 flow [2022-12-13 19:36:32,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:32,368 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:32,368 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:36:32,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 19:36:32,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:36:32,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 19:36:32,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:32,569 INFO L85 PathProgramCache]: Analyzing trace with hash 18742, now seen corresponding path program 1 times [2022-12-13 19:36:32,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:36:32,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495567786] [2022-12-13 19:36:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:32,570 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:36:32,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:36:32,571 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:36:32,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 19:36:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:36:32,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:36:32,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:36:32,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 19:36:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:36:32,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:36:32,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:36:32,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495567786] [2022-12-13 19:36:32,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495567786] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:36:32,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:36:32,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:36:32,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434481234] [2022-12-13 19:36:32,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:36:32,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:36:32,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:36:32,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:36:32,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:36:32,626 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 216 [2022-12-13 19:36:32,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:32,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:36:32,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 216 [2022-12-13 19:36:32,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:36:32,690 INFO L130 PetriNetUnfolder]: 199/319 cut-off events. [2022-12-13 19:36:32,690 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 19:36:32,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 637 conditions, 319 events. 199/319 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1153 event pairs, 95 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 631. Up to 285 conditions per place. [2022-12-13 19:36:32,692 INFO L137 encePairwiseOnDemand]: 214/216 looper letters, 21 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2022-12-13 19:36:32,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 110 flow [2022-12-13 19:36:32,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:36:32,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:36:32,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 311 transitions. [2022-12-13 19:36:32,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4799382716049383 [2022-12-13 19:36:32,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 311 transitions. [2022-12-13 19:36:32,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 311 transitions. [2022-12-13 19:36:32,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:36:32,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 311 transitions. [2022-12-13 19:36:32,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:32,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:32,695 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:32,695 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 68 flow. Second operand 3 states and 311 transitions. [2022-12-13 19:36:32,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 110 flow [2022-12-13 19:36:32,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 109 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:36:32,696 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 67 flow [2022-12-13 19:36:32,696 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2022-12-13 19:36:32,696 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2022-12-13 19:36:32,696 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 67 flow [2022-12-13 19:36:32,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:32,696 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:32,697 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:36:32,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 19:36:32,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:36:32,898 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 19:36:32,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:32,900 INFO L85 PathProgramCache]: Analyzing trace with hash 141941203, now seen corresponding path program 1 times [2022-12-13 19:36:32,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:36:32,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281245402] [2022-12-13 19:36:32,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:32,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:36:32,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:36:32,904 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:36:32,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 19:36:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:36:33,022 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 19:36:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:36:33,045 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-12-13 19:36:33,045 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 19:36:33,045 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 7 remaining) [2022-12-13 19:36:33,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2022-12-13 19:36:33,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 19:36:33,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 19:36:33,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2022-12-13 19:36:33,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2022-12-13 19:36:33,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 19:36:33,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-12-13 19:36:33,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ffaca38-d2f3-40d4-bfe1-2185d6fa2190/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:36:33,248 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 19:36:33,252 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2022-12-13 19:36:33,252 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 19:36:33,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 07:36:33 BasicIcfg [2022-12-13 19:36:33,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 19:36:33,272 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 19:36:33,272 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 19:36:33,272 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 19:36:33,273 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:36:23" (3/4) ... [2022-12-13 19:36:33,275 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-13 19:36:33,275 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 19:36:33,276 INFO L158 Benchmark]: Toolchain (without parser) took 10061.49ms. Allocated memory was 60.8MB in the beginning and 96.5MB in the end (delta: 35.7MB). Free memory was 28.6MB in the beginning and 47.4MB in the end (delta: -18.7MB). Peak memory consumption was 15.6MB. Max. memory is 16.1GB. [2022-12-13 19:36:33,276 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 60.8MB. Free memory was 39.4MB in the beginning and 39.3MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 19:36:33,277 INFO L158 Benchmark]: CACSL2BoogieTranslator took 408.43ms. Allocated memory was 60.8MB in the beginning and 96.5MB in the end (delta: 35.7MB). Free memory was 28.5MB in the beginning and 59.2MB in the end (delta: -30.7MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. [2022-12-13 19:36:33,277 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.36ms. Allocated memory is still 96.5MB. Free memory was 59.2MB in the beginning and 57.4MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 19:36:33,277 INFO L158 Benchmark]: Boogie Preprocessor took 19.96ms. Allocated memory is still 96.5MB. Free memory was 57.4MB in the beginning and 55.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 19:36:33,277 INFO L158 Benchmark]: RCFGBuilder took 319.37ms. Allocated memory is still 96.5MB. Free memory was 55.8MB in the beginning and 67.5MB in the end (delta: -11.7MB). Peak memory consumption was 8.3MB. Max. memory is 16.1GB. [2022-12-13 19:36:33,278 INFO L158 Benchmark]: TraceAbstraction took 9275.43ms. Allocated memory is still 96.5MB. Free memory was 67.0MB in the beginning and 47.7MB in the end (delta: 19.3MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. [2022-12-13 19:36:33,278 INFO L158 Benchmark]: Witness Printer took 3.33ms. Allocated memory is still 96.5MB. Free memory is still 47.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 19:36:33,280 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 60.8MB. Free memory was 39.4MB in the beginning and 39.3MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 408.43ms. Allocated memory was 60.8MB in the beginning and 96.5MB in the end (delta: 35.7MB). Free memory was 28.5MB in the beginning and 59.2MB in the end (delta: -30.7MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.36ms. Allocated memory is still 96.5MB. Free memory was 59.2MB in the beginning and 57.4MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 19.96ms. Allocated memory is still 96.5MB. Free memory was 57.4MB in the beginning and 55.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 319.37ms. Allocated memory is still 96.5MB. Free memory was 55.8MB in the beginning and 67.5MB in the end (delta: -11.7MB). Peak memory consumption was 8.3MB. Max. memory is 16.1GB. * TraceAbstraction took 9275.43ms. Allocated memory is still 96.5MB. Free memory was 67.0MB in the beginning and 47.7MB in the end (delta: 19.3MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. * Witness Printer took 3.33ms. Allocated memory is still 96.5MB. Free memory is still 47.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 69 PlacesBefore, 18 PlacesAfterwards, 75 TransitionsBefore, 20 TransitionsAfterwards, 1520 CoEnabledTransitionPairs, 4 FixpointIterations, 14 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 4 ChoiceCompositions, 66 TotalNumberOfCompositions, 1173 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1173, independent: 1173, independent conditional: 0, independent unconditional: 1173, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 721, independent: 721, independent conditional: 0, independent unconditional: 721, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1173, independent: 452, independent conditional: 0, independent unconditional: 452, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 721, unknown conditional: 0, unknown unconditional: 721] , Statistics on independence cache: Total cache size (in pairs): 11, Positive cache size: 11, Positive conditional cache size: 0, Positive unconditional cache size: 11, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.7s, 104 PlacesBefore, 28 PlacesAfterwards, 116 TransitionsBefore, 33 TransitionsAfterwards, 6320 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 62 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 17 ConcurrentYvCompositions, 7 ChoiceCompositions, 100 TotalNumberOfCompositions, 4716 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4716, independent: 4716, independent conditional: 0, independent unconditional: 4716, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3016, independent: 3016, independent conditional: 0, independent unconditional: 3016, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4716, independent: 1700, independent conditional: 0, independent unconditional: 1700, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 3016, unknown conditional: 0, unknown unconditional: 3016] , Statistics on independence cache: Total cache size (in pairs): 33, Positive cache size: 33, Positive conditional cache size: 0, Positive unconditional cache size: 33, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 695]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 695. Possible FailurePath: [L700] 0 pthread_t t; VAL [t={3:0}] [L701] COND TRUE 0 1 [L703] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [arg={0:0}, pthread_create(&t, 0, thr1, 0)=-1, t={3:0}] [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L687] 1 int i, j=1, k=1; [L688] 1 i=0 VAL [arg={0:0}, arg={0:0}, i=0, j=1, k=1, x=0, y=-2147483648, z=0] [L688] COND FALSE 1 !(i