./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/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_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/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_9180f3bd-b997-4c16-8622-3852a77b0f2f/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 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 --- 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 16:52:40,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:52:40,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:52:40,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:52:40,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:52:40,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:52:40,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:52:40,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:52:40,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:52:40,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:52:40,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:52:40,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:52:40,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:52:40,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:52:40,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:52:40,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:52:40,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:52:40,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:52:40,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:52:40,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:52:40,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:52:40,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:52:40,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:52:40,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:52:40,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:52:40,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:52:40,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:52:40,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:52:40,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:52:40,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:52:40,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:52:40,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:52:40,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:52:40,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:52:40,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:52:40,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:52:40,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:52:40,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:52:40,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:52:40,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:52:40,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:52:40,698 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 16:52:40,716 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:52:40,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:52:40,717 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:52:40,717 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:52:40,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:52:40,718 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:52:40,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:52:40,723 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:52:40,723 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:52:40,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:52:40,723 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:52:40,724 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 16:52:40,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:52:40,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:52:40,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:52:40,724 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 16:52:40,724 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 16:52:40,724 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 16:52:40,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:52:40,724 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 16:52:40,725 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:52:40,725 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:52:40,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:52:40,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:52:40,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:52:40,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:52:40,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:52:40,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:52:40,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:52:40,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:52:40,726 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:52:40,726 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:52:40,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:52:40,726 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:52:40,726 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_9180f3bd-b997-4c16-8622-3852a77b0f2f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 [2022-12-13 16:52:40,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:52:40,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:52:40,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:52:40,930 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:52:40,930 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:52:40,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i [2022-12-13 16:52:43,584 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:52:43,736 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:52:43,736 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i [2022-12-13 16:52:43,744 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/data/ce45dd640/7f4fc1cdea1f49059de373ad4d36f761/FLAG1b5802a0a [2022-12-13 16:52:43,755 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/data/ce45dd640/7f4fc1cdea1f49059de373ad4d36f761 [2022-12-13 16:52:43,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:52:43,758 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:52:43,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:52:43,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:52:43,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:52:43,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:52:43" (1/1) ... [2022-12-13 16:52:43,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a61cc61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:52:43, skipping insertion in model container [2022-12-13 16:52:43,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:52:43" (1/1) ... [2022-12-13 16:52:43,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:52:43,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:52:43,985 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_9180f3bd-b997-4c16-8622-3852a77b0f2f/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i[30176,30189] [2022-12-13 16:52:44,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:52:44,012 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:52:44,032 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_9180f3bd-b997-4c16-8622-3852a77b0f2f/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i[30176,30189] [2022-12-13 16:52:44,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:52:44,060 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:52:44,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:52:44 WrapperNode [2022-12-13 16:52:44,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:52:44,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:52:44,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:52:44,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:52:44,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:52:44" (1/1) ... [2022-12-13 16:52:44,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:52:44" (1/1) ... [2022-12-13 16:52:44,091 INFO L138 Inliner]: procedures = 171, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 130 [2022-12-13 16:52:44,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:52:44,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:52:44,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:52:44,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:52:44,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:52:44" (1/1) ... [2022-12-13 16:52:44,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:52:44" (1/1) ... [2022-12-13 16:52:44,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:52:44" (1/1) ... [2022-12-13 16:52:44,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:52:44" (1/1) ... [2022-12-13 16:52:44,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:52:44" (1/1) ... [2022-12-13 16:52:44,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:52:44" (1/1) ... [2022-12-13 16:52:44,109 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:52:44" (1/1) ... [2022-12-13 16:52:44,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:52:44" (1/1) ... [2022-12-13 16:52:44,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:52:44,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:52:44,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:52:44,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:52:44,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:52:44" (1/1) ... [2022-12-13 16:52:44,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:52:44,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:52:44,135 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:52:44,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:52:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:52:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:52:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 16:52:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:52:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:52:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 16:52:44,160 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 16:52:44,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:52:44,161 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2022-12-13 16:52:44,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:52:44,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:52:44,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:52:44,162 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 16:52:44,256 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:52:44,257 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:52:44,496 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:52:44,503 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:52:44,504 INFO L300 CfgBuilder]: Removed 23 assume(true) statements. [2022-12-13 16:52:44,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:52:44 BoogieIcfgContainer [2022-12-13 16:52:44,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:52:44,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:52:44,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:52:44,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:52:44,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:52:43" (1/3) ... [2022-12-13 16:52:44,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ecdc97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:52:44, skipping insertion in model container [2022-12-13 16:52:44,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:52:44" (2/3) ... [2022-12-13 16:52:44,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ecdc97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:52:44, skipping insertion in model container [2022-12-13 16:52:44,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:52:44" (3/3) ... [2022-12-13 16:52:44,511 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_42-trylock2_racefree.i [2022-12-13 16:52:44,525 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:52:44,525 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-12-13 16:52:44,525 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 16:52:44,570 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 16:52:44,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 204 transitions, 416 flow [2022-12-13 16:52:44,678 INFO L130 PetriNetUnfolder]: 45/305 cut-off events. [2022-12-13 16:52:44,679 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 16:52:44,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 305 events. 45/305 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1226 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 159. Up to 6 conditions per place. [2022-12-13 16:52:44,686 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 204 transitions, 416 flow [2022-12-13 16:52:44,691 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 204 transitions, 416 flow [2022-12-13 16:52:44,694 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:52:44,701 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 204 transitions, 416 flow [2022-12-13 16:52:44,703 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 204 transitions, 416 flow [2022-12-13 16:52:44,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 204 transitions, 416 flow [2022-12-13 16:52:44,749 INFO L130 PetriNetUnfolder]: 45/305 cut-off events. [2022-12-13 16:52:44,749 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 16:52:44,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 305 events. 45/305 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1226 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 159. Up to 6 conditions per place. [2022-12-13 16:52:44,756 INFO L119 LiptonReduction]: Number of co-enabled transitions 11342 [2022-12-13 16:52:47,807 INFO L134 LiptonReduction]: Checked pairs total: 23515 [2022-12-13 16:52:47,807 INFO L136 LiptonReduction]: Total number of compositions: 171 [2022-12-13 16:52:47,817 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:52:47,822 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;@4b6fdef7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:52:47,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-12-13 16:52:47,823 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 16:52:47,823 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:52:47,823 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:52:47,824 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 16:52:47,824 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2022-12-13 16:52:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:52:47,828 INFO L85 PathProgramCache]: Analyzing trace with hash 24977, now seen corresponding path program 1 times [2022-12-13 16:52:47,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:52:47,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386694207] [2022-12-13 16:52:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:52:47,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:52:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:52:47,987 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 16:52:47,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:52:47,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386694207] [2022-12-13 16:52:47,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386694207] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:52:47,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:52:47,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:52:47,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239261525] [2022-12-13 16:52:47,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:52:47,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:52:47,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:52:48,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:52:48,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:52:48,045 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 375 [2022-12-13 16:52:48,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 75 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 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 16:52:48,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:52:48,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 375 [2022-12-13 16:52:48,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:52:48,207 INFO L130 PetriNetUnfolder]: 423/971 cut-off events. [2022-12-13 16:52:48,208 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 16:52:48,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1879 conditions, 971 events. 423/971 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4684 event pairs, 375 based on Foata normal form. 73/871 useless extension candidates. Maximal degree in co-relation 1803. Up to 835 conditions per place. [2022-12-13 16:52:48,213 INFO L137 encePairwiseOnDemand]: 350/375 looper letters, 59 selfloop transitions, 2 changer transitions 1/68 dead transitions. [2022-12-13 16:52:48,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 268 flow [2022-12-13 16:52:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:52:48,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:52:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2022-12-13 16:52:48,224 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.52 [2022-12-13 16:52:48,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2022-12-13 16:52:48,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2022-12-13 16:52:48,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:52:48,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2022-12-13 16:52:48,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 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 16:52:48,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 16:52:48,240 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 16:52:48,242 INFO L175 Difference]: Start difference. First operand has 56 places, 75 transitions, 158 flow. Second operand 3 states and 585 transitions. [2022-12-13 16:52:48,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 268 flow [2022-12-13 16:52:48,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 68 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:52:48,248 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 116 flow [2022-12-13 16:52:48,250 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2022-12-13 16:52:48,254 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2022-12-13 16:52:48,254 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 116 flow [2022-12-13 16:52:48,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 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 16:52:48,254 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:52:48,255 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 16:52:48,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:52:48,255 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2022-12-13 16:52:48,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:52:48,256 INFO L85 PathProgramCache]: Analyzing trace with hash 24978, now seen corresponding path program 1 times [2022-12-13 16:52:48,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:52:48,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471305810] [2022-12-13 16:52:48,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:52:48,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:52:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:52:48,365 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 16:52:48,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:52:48,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471305810] [2022-12-13 16:52:48,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471305810] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:52:48,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:52:48,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:52:48,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354954659] [2022-12-13 16:52:48,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:52:48,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:52:48,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:52:48,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:52:48,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:52:48,394 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 375 [2022-12-13 16:52:48,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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 16:52:48,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:52:48,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 375 [2022-12-13 16:52:48,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:52:48,516 INFO L130 PetriNetUnfolder]: 406/913 cut-off events. [2022-12-13 16:52:48,516 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 16:52:48,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1785 conditions, 913 events. 406/913 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4232 event pairs, 350 based on Foata normal form. 0/783 useless extension candidates. Maximal degree in co-relation 1756. Up to 828 conditions per place. [2022-12-13 16:52:48,519 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 60 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2022-12-13 16:52:48,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 272 flow [2022-12-13 16:52:48,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:52:48,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:52:48,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2022-12-13 16:52:48,521 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49955555555555553 [2022-12-13 16:52:48,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2022-12-13 16:52:48,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2022-12-13 16:52:48,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:52:48,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2022-12-13 16:52:48,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 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 16:52:48,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 16:52:48,527 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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 16:52:48,527 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 116 flow. Second operand 3 states and 562 transitions. [2022-12-13 16:52:48,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 272 flow [2022-12-13 16:52:48,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 68 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:52:48,529 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 122 flow [2022-12-13 16:52:48,529 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2022-12-13 16:52:48,530 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2022-12-13 16:52:48,530 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 122 flow [2022-12-13 16:52:48,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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 16:52:48,530 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:52:48,531 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 16:52:48,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 16:52:48,531 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2022-12-13 16:52:48,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:52:48,531 INFO L85 PathProgramCache]: Analyzing trace with hash 744640669, now seen corresponding path program 1 times [2022-12-13 16:52:48,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:52:48,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945695790] [2022-12-13 16:52:48,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:52:48,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:52:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:52:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:52:48,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:52:48,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945695790] [2022-12-13 16:52:48,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945695790] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:52:48,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817133884] [2022-12-13 16:52:48,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:52:48,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:52:48,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:52:48,620 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:52:48,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:52:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:52:48,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 16:52:48,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:52:48,728 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 16:52:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:52:48,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:52:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:52:48,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817133884] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:52:48,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:52:48,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 16:52:48,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420886152] [2022-12-13 16:52:48,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:52:48,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 16:52:48,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:52:48,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 16:52:48,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:52:48,921 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 375 [2022-12-13 16:52:48,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 122 flow. Second operand has 8 states, 8 states have (on average 163.875) internal successors, (1311), 8 states have internal predecessors, (1311), 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 16:52:48,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:52:48,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 375 [2022-12-13 16:52:48,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:52:49,008 INFO L130 PetriNetUnfolder]: 30/99 cut-off events. [2022-12-13 16:52:49,008 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-13 16:52:49,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 99 events. 30/99 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 245 event pairs, 0 based on Foata normal form. 16/115 useless extension candidates. Maximal degree in co-relation 189. Up to 62 conditions per place. [2022-12-13 16:52:49,009 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 33 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2022-12-13 16:52:49,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 159 flow [2022-12-13 16:52:49,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:52:49,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:52:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 685 transitions. [2022-12-13 16:52:49,012 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45666666666666667 [2022-12-13 16:52:49,012 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 685 transitions. [2022-12-13 16:52:49,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 685 transitions. [2022-12-13 16:52:49,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:52:49,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 685 transitions. [2022-12-13 16:52:49,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.25) internal successors, (685), 4 states have internal predecessors, (685), 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 16:52:49,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 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 16:52:49,018 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 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 16:52:49,018 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 122 flow. Second operand 4 states and 685 transitions. [2022-12-13 16:52:49,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 159 flow [2022-12-13 16:52:49,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 39 transitions, 153 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 16:52:49,019 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 55 flow [2022-12-13 16:52:49,019 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=55, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2022-12-13 16:52:49,020 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, -27 predicate places. [2022-12-13 16:52:49,020 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 55 flow [2022-12-13 16:52:49,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 163.875) internal successors, (1311), 8 states have internal predecessors, (1311), 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 16:52:49,021 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:52:49,021 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 16:52:49,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:52:49,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:52:49,223 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2022-12-13 16:52:49,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:52:49,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1609024776, now seen corresponding path program 1 times [2022-12-13 16:52:49,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:52:49,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055451714] [2022-12-13 16:52:49,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:52:49,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:52:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:52:49,277 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 16:52:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:52:49,342 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 16:52:49,342 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 16:52:49,344 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2022-12-13 16:52:49,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2022-12-13 16:52:49,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2022-12-13 16:52:49,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2022-12-13 16:52:49,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2022-12-13 16:52:49,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2022-12-13 16:52:49,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2022-12-13 16:52:49,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2022-12-13 16:52:49,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2022-12-13 16:52:49,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2022-12-13 16:52:49,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 16:52:49,349 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 16:52:49,353 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 16:52:49,353 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 16:52:49,378 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 16:52:49,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 259 transitions, 536 flow [2022-12-13 16:52:49,418 INFO L130 PetriNetUnfolder]: 76/491 cut-off events. [2022-12-13 16:52:49,418 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 16:52:49,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 491 events. 76/491 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2238 event pairs, 0 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 307. Up to 9 conditions per place. [2022-12-13 16:52:49,420 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 259 transitions, 536 flow [2022-12-13 16:52:49,423 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 259 transitions, 536 flow [2022-12-13 16:52:49,423 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:52:49,423 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 259 transitions, 536 flow [2022-12-13 16:52:49,423 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 259 transitions, 536 flow [2022-12-13 16:52:49,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 259 transitions, 536 flow [2022-12-13 16:52:49,458 INFO L130 PetriNetUnfolder]: 76/491 cut-off events. [2022-12-13 16:52:49,458 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 16:52:49,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 491 events. 76/491 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2238 event pairs, 0 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 307. Up to 9 conditions per place. [2022-12-13 16:52:49,471 INFO L119 LiptonReduction]: Number of co-enabled transitions 29468 [2022-12-13 16:52:52,383 INFO L134 LiptonReduction]: Checked pairs total: 77356 [2022-12-13 16:52:52,383 INFO L136 LiptonReduction]: Total number of compositions: 191 [2022-12-13 16:52:52,384 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:52:52,385 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;@4b6fdef7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:52:52,385 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-12-13 16:52:52,386 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 16:52:52,386 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:52:52,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:52:52,386 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 16:52:52,386 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2022-12-13 16:52:52,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:52:52,387 INFO L85 PathProgramCache]: Analyzing trace with hash 41142, now seen corresponding path program 1 times [2022-12-13 16:52:52,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:52:52,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652502621] [2022-12-13 16:52:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:52:52,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:52:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:52:52,425 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 16:52:52,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:52:52,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652502621] [2022-12-13 16:52:52,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652502621] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:52:52,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:52:52,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:52:52,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944173447] [2022-12-13 16:52:52,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:52:52,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:52:52,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:52:52,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:52:52,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:52:52,456 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 450 [2022-12-13 16:52:52,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 117 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 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 16:52:52,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:52:52,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 450 [2022-12-13 16:52:52,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:52:54,331 INFO L130 PetriNetUnfolder]: 15499/26517 cut-off events. [2022-12-13 16:52:54,331 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2022-12-13 16:52:54,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50680 conditions, 26517 events. 15499/26517 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 198711 event pairs, 14669 based on Foata normal form. 5439/28368 useless extension candidates. Maximal degree in co-relation 42267. Up to 24051 conditions per place. [2022-12-13 16:52:54,451 INFO L137 encePairwiseOnDemand]: 414/450 looper letters, 82 selfloop transitions, 2 changer transitions 1/103 dead transitions. [2022-12-13 16:52:54,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 103 transitions, 394 flow [2022-12-13 16:52:54,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:52:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:52:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2022-12-13 16:52:54,454 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.557037037037037 [2022-12-13 16:52:54,454 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2022-12-13 16:52:54,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2022-12-13 16:52:54,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:52:54,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2022-12-13 16:52:54,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 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 16:52:54,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 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 16:52:54,458 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 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 16:52:54,458 INFO L175 Difference]: Start difference. First operand has 87 places, 117 transitions, 252 flow. Second operand 3 states and 752 transitions. [2022-12-13 16:52:54,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 103 transitions, 394 flow [2022-12-13 16:52:54,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 103 transitions, 394 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:52:54,461 INFO L231 Difference]: Finished difference. Result has 90 places, 85 transitions, 200 flow [2022-12-13 16:52:54,461 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=90, PETRI_TRANSITIONS=85} [2022-12-13 16:52:54,462 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2022-12-13 16:52:54,462 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 85 transitions, 200 flow [2022-12-13 16:52:54,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 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 16:52:54,462 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:52:54,462 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 16:52:54,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 16:52:54,462 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2022-12-13 16:52:54,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:52:54,463 INFO L85 PathProgramCache]: Analyzing trace with hash 41141, now seen corresponding path program 1 times [2022-12-13 16:52:54,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:52:54,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125231394] [2022-12-13 16:52:54,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:52:54,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:52:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:52:54,485 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 16:52:54,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:52:54,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125231394] [2022-12-13 16:52:54,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125231394] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:52:54,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:52:54,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:52:54,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656006019] [2022-12-13 16:52:54,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:52:54,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:52:54,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:52:54,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:52:54,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:52:54,512 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 450 [2022-12-13 16:52:54,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 85 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 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 16:52:54,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:52:54,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 450 [2022-12-13 16:52:54,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:52:56,067 INFO L130 PetriNetUnfolder]: 13984/23972 cut-off events. [2022-12-13 16:52:56,067 INFO L131 PetriNetUnfolder]: For 625/625 co-relation queries the response was YES. [2022-12-13 16:52:56,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46604 conditions, 23972 events. 13984/23972 cut-off events. For 625/625 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 177914 event pairs, 13185 based on Foata normal form. 0/21493 useless extension candidates. Maximal degree in co-relation 46487. Up to 20904 conditions per place. [2022-12-13 16:52:56,156 INFO L137 encePairwiseOnDemand]: 446/450 looper letters, 93 selfloop transitions, 2 changer transitions 0/113 dead transitions. [2022-12-13 16:52:56,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 113 transitions, 446 flow [2022-12-13 16:52:56,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:52:56,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:52:56,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 708 transitions. [2022-12-13 16:52:56,158 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5244444444444445 [2022-12-13 16:52:56,158 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 708 transitions. [2022-12-13 16:52:56,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 708 transitions. [2022-12-13 16:52:56,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:52:56,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 708 transitions. [2022-12-13 16:52:56,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 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 16:52:56,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 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 16:52:56,162 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 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 16:52:56,162 INFO L175 Difference]: Start difference. First operand has 90 places, 85 transitions, 200 flow. Second operand 3 states and 708 transitions. [2022-12-13 16:52:56,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 113 transitions, 446 flow [2022-12-13 16:52:56,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 113 transitions, 444 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:52:56,166 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 198 flow [2022-12-13 16:52:56,167 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2022-12-13 16:52:56,167 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 1 predicate places. [2022-12-13 16:52:56,168 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 198 flow [2022-12-13 16:52:56,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 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 16:52:56,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:52:56,169 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:52:56,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 16:52:56,169 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2022-12-13 16:52:56,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:52:56,169 INFO L85 PathProgramCache]: Analyzing trace with hash -625789591, now seen corresponding path program 1 times [2022-12-13 16:52:56,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:52:56,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63254940] [2022-12-13 16:52:56,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:52:56,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:52:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:52:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:52:56,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:52:56,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63254940] [2022-12-13 16:52:56,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63254940] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:52:56,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662275948] [2022-12-13 16:52:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:52:56,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:52:56,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:52:56,254 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:52:56,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:52:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:52:56,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 16:52:56,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:52:56,321 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 16:52:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:52:56,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:52:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:52:56,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662275948] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:52:56,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:52:56,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 16:52:56,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512144948] [2022-12-13 16:52:56,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:52:56,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 16:52:56,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:52:56,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 16:52:56,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:52:56,527 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 450 [2022-12-13 16:52:56,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 198 flow. Second operand has 8 states, 8 states have (on average 204.875) internal successors, (1639), 8 states have internal predecessors, (1639), 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 16:52:56,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:52:56,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 450 [2022-12-13 16:52:56,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:52:56,885 INFO L130 PetriNetUnfolder]: 1230/2424 cut-off events. [2022-12-13 16:52:56,885 INFO L131 PetriNetUnfolder]: For 560/560 co-relation queries the response was YES. [2022-12-13 16:52:56,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5154 conditions, 2424 events. 1230/2424 cut-off events. For 560/560 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 14429 event pairs, 96 based on Foata normal form. 272/2696 useless extension candidates. Maximal degree in co-relation 5144. Up to 1472 conditions per place. [2022-12-13 16:52:56,894 INFO L137 encePairwiseOnDemand]: 446/450 looper letters, 80 selfloop transitions, 3 changer transitions 0/99 dead transitions. [2022-12-13 16:52:56,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 99 transitions, 384 flow [2022-12-13 16:52:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:52:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:52:56,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1102 transitions. [2022-12-13 16:52:56,897 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48977777777777776 [2022-12-13 16:52:56,897 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1102 transitions. [2022-12-13 16:52:56,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1102 transitions. [2022-12-13 16:52:56,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:52:56,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1102 transitions. [2022-12-13 16:52:56,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.4) internal successors, (1102), 5 states have internal predecessors, (1102), 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 16:52:56,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 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 16:52:56,903 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 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 16:52:56,903 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 198 flow. Second operand 5 states and 1102 transitions. [2022-12-13 16:52:56,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 99 transitions, 384 flow [2022-12-13 16:52:56,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 99 transitions, 381 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 16:52:56,906 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 127 flow [2022-12-13 16:52:56,906 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2022-12-13 16:52:56,906 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, -24 predicate places. [2022-12-13 16:52:56,906 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 127 flow [2022-12-13 16:52:56,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 204.875) internal successors, (1639), 8 states have internal predecessors, (1639), 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 16:52:56,907 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:52:56,907 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 16:52:56,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:52:57,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 16:52:57,108 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2022-12-13 16:52:57,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:52:57,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1056896682, now seen corresponding path program 1 times [2022-12-13 16:52:57,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:52:57,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833797781] [2022-12-13 16:52:57,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:52:57,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:52:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:52:57,124 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 16:52:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:52:57,140 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 16:52:57,140 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 16:52:57,140 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2022-12-13 16:52:57,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2022-12-13 16:52:57,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2022-12-13 16:52:57,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2022-12-13 16:52:57,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2022-12-13 16:52:57,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2022-12-13 16:52:57,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2022-12-13 16:52:57,142 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2022-12-13 16:52:57,142 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2022-12-13 16:52:57,142 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2022-12-13 16:52:57,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 16:52:57,142 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 16:52:57,143 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 16:52:57,143 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 16:52:57,176 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 16:52:57,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 314 transitions, 658 flow [2022-12-13 16:52:57,330 INFO L130 PetriNetUnfolder]: 112/720 cut-off events. [2022-12-13 16:52:57,330 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 16:52:57,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 720 events. 112/720 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3448 event pairs, 1 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 499. Up to 16 conditions per place. [2022-12-13 16:52:57,333 INFO L82 GeneralOperation]: Start removeDead. Operand has 266 places, 314 transitions, 658 flow [2022-12-13 16:52:57,337 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 266 places, 314 transitions, 658 flow [2022-12-13 16:52:57,337 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:52:57,337 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 266 places, 314 transitions, 658 flow [2022-12-13 16:52:57,337 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 266 places, 314 transitions, 658 flow [2022-12-13 16:52:57,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 314 transitions, 658 flow [2022-12-13 16:52:57,396 INFO L130 PetriNetUnfolder]: 112/720 cut-off events. [2022-12-13 16:52:57,396 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 16:52:57,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 720 events. 112/720 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3448 event pairs, 1 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 499. Up to 16 conditions per place. [2022-12-13 16:52:57,417 INFO L119 LiptonReduction]: Number of co-enabled transitions 53106 [2022-12-13 16:53:00,766 INFO L134 LiptonReduction]: Checked pairs total: 168019 [2022-12-13 16:53:00,766 INFO L136 LiptonReduction]: Total number of compositions: 216 [2022-12-13 16:53:00,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:53:00,768 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;@4b6fdef7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:53:00,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-12-13 16:53:00,769 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2022-12-13 16:53:00,769 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:53:00,769 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:53:00,769 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 16:53:00,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2022-12-13 16:53:00,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:53:00,770 INFO L85 PathProgramCache]: Analyzing trace with hash 59860, now seen corresponding path program 1 times [2022-12-13 16:53:00,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:53:00,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907180032] [2022-12-13 16:53:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:53:00,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:53:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:53:00,788 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 16:53:00,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:53:00,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907180032] [2022-12-13 16:53:00,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907180032] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:53:00,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:53:00,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:53:00,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822574703] [2022-12-13 16:53:00,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:53:00,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:53:00,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:53:00,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:53:00,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:53:00,812 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 530 [2022-12-13 16:53:00,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 153 transitions, 336 flow. Second operand has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 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 16:53:00,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:53:00,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 530 [2022-12-13 16:53:00,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:53:35,375 INFO L130 PetriNetUnfolder]: 353316/521503 cut-off events. [2022-12-13 16:53:35,375 INFO L131 PetriNetUnfolder]: For 2720/2720 co-relation queries the response was YES. [2022-12-13 16:53:36,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1006188 conditions, 521503 events. 353316/521503 cut-off events. For 2720/2720 co-relation queries the response was YES. Maximal size of possible extension queue 7973. Compared 4571226 event pairs, 322777 based on Foata normal form. 83627/555348 useless extension candidates. Maximal degree in co-relation 435633. Up to 446995 conditions per place. [2022-12-13 16:53:37,658 INFO L137 encePairwiseOnDemand]: 481/530 looper letters, 124 selfloop transitions, 2 changer transitions 1/152 dead transitions. [2022-12-13 16:53:37,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 152 transitions, 588 flow [2022-12-13 16:53:37,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:53:37,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:53:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 944 transitions. [2022-12-13 16:53:37,661 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5937106918238994 [2022-12-13 16:53:37,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 944 transitions. [2022-12-13 16:53:37,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 944 transitions. [2022-12-13 16:53:37,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:53:37,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 944 transitions. [2022-12-13 16:53:37,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 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 16:53:37,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 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 16:53:37,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 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 16:53:37,665 INFO L175 Difference]: Start difference. First operand has 112 places, 153 transitions, 336 flow. Second operand 3 states and 944 transitions. [2022-12-13 16:53:37,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 152 transitions, 588 flow [2022-12-13 16:53:37,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 152 transitions, 588 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:53:37,684 INFO L231 Difference]: Finished difference. Result has 112 places, 106 transitions, 246 flow [2022-12-13 16:53:37,685 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=112, PETRI_TRANSITIONS=106} [2022-12-13 16:53:37,685 INFO L288 CegarLoopForPetriNet]: 112 programPoint places, 0 predicate places. [2022-12-13 16:53:37,685 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 106 transitions, 246 flow [2022-12-13 16:53:37,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 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 16:53:37,685 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:53:37,685 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 16:53:37,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 16:53:37,686 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2022-12-13 16:53:37,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:53:37,686 INFO L85 PathProgramCache]: Analyzing trace with hash 59862, now seen corresponding path program 1 times [2022-12-13 16:53:37,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:53:37,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413110085] [2022-12-13 16:53:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:53:37,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:53:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:53:37,722 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 16:53:37,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:53:37,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413110085] [2022-12-13 16:53:37,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413110085] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:53:37,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:53:37,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:53:37,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336483600] [2022-12-13 16:53:37,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:53:37,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:53:37,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:53:37,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:53:37,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:53:37,758 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 530 [2022-12-13 16:53:37,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 106 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 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 16:53:37,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:53:37,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 530 [2022-12-13 16:53:37,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:08,315 INFO L130 PetriNetUnfolder]: 340358/504736 cut-off events. [2022-12-13 16:54:08,315 INFO L131 PetriNetUnfolder]: For 5666/5666 co-relation queries the response was YES. [2022-12-13 16:54:09,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 976579 conditions, 504736 events. 340358/504736 cut-off events. For 5666/5666 co-relation queries the response was YES. Maximal size of possible extension queue 7751. Compared 4448814 event pairs, 220413 based on Foata normal form. 0/467536 useless extension candidates. Maximal degree in co-relation 934978. Up to 464807 conditions per place. [2022-12-13 16:54:10,661 INFO L137 encePairwiseOnDemand]: 526/530 looper letters, 96 selfloop transitions, 2 changer transitions 0/123 dead transitions. [2022-12-13 16:54:10,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 123 transitions, 476 flow [2022-12-13 16:54:10,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:54:10,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:54:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 844 transitions. [2022-12-13 16:54:10,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5308176100628931 [2022-12-13 16:54:10,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 844 transitions. [2022-12-13 16:54:10,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 844 transitions. [2022-12-13 16:54:10,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:10,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 844 transitions. [2022-12-13 16:54:10,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.3333333333333) internal successors, (844), 3 states have internal predecessors, (844), 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 16:54:10,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 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 16:54:10,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 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 16:54:10,673 INFO L175 Difference]: Start difference. First operand has 112 places, 106 transitions, 246 flow. Second operand 3 states and 844 transitions. [2022-12-13 16:54:10,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 123 transitions, 476 flow [2022-12-13 16:54:12,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 123 transitions, 472 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:54:12,995 INFO L231 Difference]: Finished difference. Result has 112 places, 107 transitions, 256 flow [2022-12-13 16:54:12,995 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=112, PETRI_TRANSITIONS=107} [2022-12-13 16:54:12,996 INFO L288 CegarLoopForPetriNet]: 112 programPoint places, 0 predicate places. [2022-12-13 16:54:12,996 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 107 transitions, 256 flow [2022-12-13 16:54:12,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 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 16:54:12,996 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:12,996 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:54:12,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 16:54:12,996 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2022-12-13 16:54:12,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:12,997 INFO L85 PathProgramCache]: Analyzing trace with hash -502065263, now seen corresponding path program 1 times [2022-12-13 16:54:12,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:12,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519000811] [2022-12-13 16:54:12,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:12,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:13,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:13,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519000811] [2022-12-13 16:54:13,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519000811] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:13,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703752159] [2022-12-13 16:54:13,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:13,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:13,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:13,055 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:13,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:54:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:13,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 16:54:13,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:13,119 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 16:54:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:13,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:54:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:13,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703752159] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:54:13,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:54:13,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 16:54:13,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085082054] [2022-12-13 16:54:13,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:54:13,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 16:54:13,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:13,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 16:54:13,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:54:13,295 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 530 [2022-12-13 16:54:13,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 107 transitions, 256 flow. Second operand has 8 states, 8 states have (on average 245.875) internal successors, (1967), 8 states have internal predecessors, (1967), 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 16:54:13,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:13,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 530 [2022-12-13 16:54:13,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:16,490 INFO L130 PetriNetUnfolder]: 31732/50621 cut-off events. [2022-12-13 16:54:16,490 INFO L131 PetriNetUnfolder]: For 17352/17352 co-relation queries the response was YES. [2022-12-13 16:54:16,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112973 conditions, 50621 events. 31732/50621 cut-off events. For 17352/17352 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 396943 event pairs, 224 based on Foata normal form. 4336/54951 useless extension candidates. Maximal degree in co-relation 105700. Up to 31106 conditions per place. [2022-12-13 16:54:16,715 INFO L137 encePairwiseOnDemand]: 526/530 looper letters, 141 selfloop transitions, 4 changer transitions 0/168 dead transitions. [2022-12-13 16:54:16,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 168 transitions, 657 flow [2022-12-13 16:54:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:54:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:54:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1615 transitions. [2022-12-13 16:54:16,719 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5078616352201258 [2022-12-13 16:54:16,719 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1615 transitions. [2022-12-13 16:54:16,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1615 transitions. [2022-12-13 16:54:16,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:16,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1615 transitions. [2022-12-13 16:54:16,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 269.1666666666667) internal successors, (1615), 6 states have internal predecessors, (1615), 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 16:54:16,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 530.0) internal successors, (3710), 7 states have internal predecessors, (3710), 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 16:54:16,725 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 530.0) internal successors, (3710), 7 states have internal predecessors, (3710), 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 16:54:16,726 INFO L175 Difference]: Start difference. First operand has 112 places, 107 transitions, 256 flow. Second operand 6 states and 1615 transitions. [2022-12-13 16:54:16,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 168 transitions, 657 flow [2022-12-13 16:54:16,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 168 transitions, 649 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:16,743 INFO L231 Difference]: Finished difference. Result has 88 places, 76 transitions, 183 flow [2022-12-13 16:54:16,743 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=88, PETRI_TRANSITIONS=76} [2022-12-13 16:54:16,744 INFO L288 CegarLoopForPetriNet]: 112 programPoint places, -24 predicate places. [2022-12-13 16:54:16,744 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 76 transitions, 183 flow [2022-12-13 16:54:16,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 245.875) internal successors, (1967), 8 states have internal predecessors, (1967), 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 16:54:16,745 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:16,745 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 16:54:16,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:54:16,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9180f3bd-b997-4c16-8622-3852a77b0f2f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:16,946 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2022-12-13 16:54:16,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:16,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1136837265, now seen corresponding path program 1 times [2022-12-13 16:54:16,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:16,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584633675] [2022-12-13 16:54:16,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:16,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:54:16,981 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 16:54:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:54:16,996 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 16:54:16,996 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 16:54:16,997 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2022-12-13 16:54:16,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2022-12-13 16:54:16,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2022-12-13 16:54:16,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2022-12-13 16:54:16,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2022-12-13 16:54:16,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2022-12-13 16:54:16,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2022-12-13 16:54:16,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2022-12-13 16:54:16,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2022-12-13 16:54:16,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2022-12-13 16:54:16,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 16:54:16,998 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 16:54:16,998 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 16:54:16,998 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 16:54:17,022 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 16:54:17,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 310 places, 369 transitions, 782 flow [2022-12-13 16:54:17,151 INFO L130 PetriNetUnfolder]: 160/1037 cut-off events. [2022-12-13 16:54:17,151 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 16:54:17,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 1037 events. 160/1037 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5294 event pairs, 6 based on Foata normal form. 0/799 useless extension candidates. Maximal degree in co-relation 740. Up to 32 conditions per place. [2022-12-13 16:54:17,158 INFO L82 GeneralOperation]: Start removeDead. Operand has 310 places, 369 transitions, 782 flow [2022-12-13 16:54:17,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 310 places, 369 transitions, 782 flow [2022-12-13 16:54:17,165 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:54:17,165 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 310 places, 369 transitions, 782 flow [2022-12-13 16:54:17,165 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 310 places, 369 transitions, 782 flow [2022-12-13 16:54:17,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 310 places, 369 transitions, 782 flow [2022-12-13 16:54:17,336 INFO L130 PetriNetUnfolder]: 160/1037 cut-off events. [2022-12-13 16:54:17,336 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 16:54:17,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 1037 events. 160/1037 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5294 event pairs, 6 based on Foata normal form. 0/799 useless extension candidates. Maximal degree in co-relation 740. Up to 32 conditions per place. [2022-12-13 16:54:17,378 INFO L119 LiptonReduction]: Number of co-enabled transitions 82680 [2022-12-13 16:54:20,559 INFO L134 LiptonReduction]: Checked pairs total: 272125 [2022-12-13 16:54:20,559 INFO L136 LiptonReduction]: Total number of compositions: 243 [2022-12-13 16:54:20,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:54:20,561 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;@4b6fdef7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:54:20,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-12-13 16:54:20,562 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 16:54:20,562 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:54:20,562 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:20,562 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 16:54:20,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2022-12-13 16:54:20,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:20,562 INFO L85 PathProgramCache]: Analyzing trace with hash 81197, now seen corresponding path program 1 times [2022-12-13 16:54:20,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:20,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871111764] [2022-12-13 16:54:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:20,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:20,598 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 16:54:20,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:20,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871111764] [2022-12-13 16:54:20,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871111764] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:20,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:54:20,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:54:20,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114158591] [2022-12-13 16:54:20,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:20,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:54:20,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:20,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:54:20,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:54:20,626 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 612 [2022-12-13 16:54:20,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 189 transitions, 422 flow. Second operand has 3 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 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 16:54:20,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:20,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 612 [2022-12-13 16:54:20,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand