./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c422778-2913-4a62-a31f-b4a2b3c68181/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c422778-2913-4a62-a31f-b4a2b3c68181/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c422778-2913-4a62-a31f-b4a2b3c68181/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c422778-2913-4a62-a31f-b4a2b3c68181/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c422778-2913-4a62-a31f-b4a2b3c68181/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c422778-2913-4a62-a31f-b4a2b3c68181/bin/uautomizer-tPACEb0tL8 --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 39dcc47a23129180b44ef3e235976e9c499f5290fa3f0e6dd106879ae94f5ae2 --- 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-e04fb08 [2022-11-16 11:50:04,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:50:04,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:50:04,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:50:04,476 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:50:04,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:50:04,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:50:04,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:50:04,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:50:04,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:50:04,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:50:04,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:50:04,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:50:04,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:50:04,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:50:04,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:50:04,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:50:04,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:50:04,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:50:04,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:50:04,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:50:04,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:50:04,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:50:04,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:50:04,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:50:04,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:50:04,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:50:04,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:50:04,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:50:04,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:50:04,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:50:04,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:50:04,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:50:04,527 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:50:04,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:50:04,531 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:50:04,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:50:04,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:50:04,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:50:04,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:50:04,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:50:04,538 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c422778-2913-4a62-a31f-b4a2b3c68181/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 11:50:04,586 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:50:04,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:50:04,588 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:50:04,588 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:50:04,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:50:04,590 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:50:04,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:50:04,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:50:04,592 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:50:04,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:50:04,593 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:50:04,594 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:50:04,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:50:04,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:50:04,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:50:04,595 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:50:04,595 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:50:04,596 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:50:04,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:50:04,596 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:50:04,596 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:50:04,597 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:50:04,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:50:04,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:50:04,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:50:04,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:50:04,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:50:04,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:50:04,599 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:50:04,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:50:04,600 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_5c422778-2913-4a62-a31f-b4a2b3c68181/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c422778-2913-4a62-a31f-b4a2b3c68181/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39dcc47a23129180b44ef3e235976e9c499f5290fa3f0e6dd106879ae94f5ae2 [2022-11-16 11:50:04,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:50:04,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:50:04,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:50:04,976 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:50:04,977 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:50:04,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c422778-2913-4a62-a31f-b4a2b3c68181/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2022-11-16 11:50:05,089 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c422778-2913-4a62-a31f-b4a2b3c68181/bin/uautomizer-tPACEb0tL8/data/9b14a43fb/2307852df0de481ba6b536df10fde6d7/FLAG0653444b2 [2022-11-16 11:50:05,647 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:50:05,648 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c422778-2913-4a62-a31f-b4a2b3c68181/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2022-11-16 11:50:05,658 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c422778-2913-4a62-a31f-b4a2b3c68181/bin/uautomizer-tPACEb0tL8/data/9b14a43fb/2307852df0de481ba6b536df10fde6d7/FLAG0653444b2 [2022-11-16 11:50:05,975 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c422778-2913-4a62-a31f-b4a2b3c68181/bin/uautomizer-tPACEb0tL8/data/9b14a43fb/2307852df0de481ba6b536df10fde6d7 [2022-11-16 11:50:05,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:50:05,981 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:50:05,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:50:05,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:50:05,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:50:05,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:50:05" (1/1) ... [2022-11-16 11:50:05,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5638e615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:05, skipping insertion in model container [2022-11-16 11:50:05,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:50:05" (1/1) ... [2022-11-16 11:50:06,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:50:06,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:50:06,419 WARN L229 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_5c422778-2913-4a62-a31f-b4a2b3c68181/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c[7978,7991] [2022-11-16 11:50:06,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:50:06,449 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:50:06,539 WARN L229 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_5c422778-2913-4a62-a31f-b4a2b3c68181/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c[7978,7991] [2022-11-16 11:50:06,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:50:06,565 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:50:06,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:06 WrapperNode [2022-11-16 11:50:06,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:50:06,567 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:50:06,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:50:06,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:50:06,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:06" (1/1) ... [2022-11-16 11:50:06,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:06" (1/1) ... [2022-11-16 11:50:06,651 INFO L138 Inliner]: procedures = 23, calls = 176, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 392 [2022-11-16 11:50:06,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:50:06,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:50:06,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:50:06,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:50:06,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:06" (1/1) ... [2022-11-16 11:50:06,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:06" (1/1) ... [2022-11-16 11:50:06,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:06" (1/1) ... [2022-11-16 11:50:06,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:06" (1/1) ... [2022-11-16 11:50:06,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:06" (1/1) ... [2022-11-16 11:50:06,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:06" (1/1) ... [2022-11-16 11:50:06,717 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:06" (1/1) ... [2022-11-16 11:50:06,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:06" (1/1) ... [2022-11-16 11:50:06,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:50:06,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:50:06,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:50:06,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:50:06,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:06" (1/1) ... [2022-11-16 11:50:06,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:50:06,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c422778-2913-4a62-a31f-b4a2b3c68181/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:50:06,791 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c422778-2913-4a62-a31f-b4a2b3c68181/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:50:06,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c422778-2913-4a62-a31f-b4a2b3c68181/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:50:06,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:50:06,836 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:50:06,836 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:50:06,836 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:50:06,836 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:50:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 11:50:06,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 11:50:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-16 11:50:06,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-16 11:50:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:50:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:50:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:50:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:50:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:50:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:50:06,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:50:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:50:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:50:06,841 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:50:06,973 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:50:06,976 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:50:07,668 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:50:07,932 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:50:07,933 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-16 11:50:07,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:50:07 BoogieIcfgContainer [2022-11-16 11:50:07,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:50:07,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:50:07,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:50:07,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:50:07,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:50:05" (1/3) ... [2022-11-16 11:50:07,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0a4ab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:50:07, skipping insertion in model container [2022-11-16 11:50:07,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:06" (2/3) ... [2022-11-16 11:50:07,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0a4ab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:50:07, skipping insertion in model container [2022-11-16 11:50:07,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:50:07" (3/3) ... [2022-11-16 11:50:07,948 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-bakery-4.wvr.c [2022-11-16 11:50:07,973 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:50:07,974 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-11-16 11:50:07,974 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:50:08,142 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 11:50:08,192 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 11:50:08,212 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 222 transitions, 476 flow [2022-11-16 11:50:08,216 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 222 transitions, 476 flow [2022-11-16 11:50:08,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 222 transitions, 476 flow [2022-11-16 11:50:08,340 INFO L130 PetriNetUnfolder]: 2/218 cut-off events. [2022-11-16 11:50:08,341 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 11:50:08,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 218 events. 2/218 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 270 event pairs, 0 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 159. Up to 2 conditions per place. [2022-11-16 11:50:08,353 INFO L119 LiptonReduction]: Number of co-enabled transitions 6800 [2022-11-16 11:50:20,570 INFO L134 LiptonReduction]: Checked pairs total: 67237 [2022-11-16 11:50:20,571 INFO L136 LiptonReduction]: Total number of compositions: 175 [2022-11-16 11:50:20,590 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 104 places, 91 transitions, 214 flow [2022-11-16 11:50:29,645 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 177303 states, 177285 states have (on average 4.36476295230843) internal successors, (773807), 177302 states have internal predecessors, (773807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:29,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:50:29,701 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=FINITE_AUTOMATA, 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;@7ed067fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:50:29,701 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-11-16 11:50:29,980 INFO L276 IsEmpty]: Start isEmpty. Operand has 177303 states, 177285 states have (on average 4.36476295230843) internal successors, (773807), 177302 states have internal predecessors, (773807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:29,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-16 11:50:29,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:29,986 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-16 11:50:29,987 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 11:50:29,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:29,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1178, now seen corresponding path program 1 times [2022-11-16 11:50:30,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:30,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972677462] [2022-11-16 11:50:30,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:30,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:30,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:30,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972677462] [2022-11-16 11:50:30,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972677462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:30,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:30,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-16 11:50:30,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731238178] [2022-11-16 11:50:30,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:30,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:50:30,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:30,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:50:30,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:50:30,665 INFO L87 Difference]: Start difference. First operand has 177303 states, 177285 states have (on average 4.36476295230843) internal successors, (773807), 177302 states have internal predecessors, (773807), 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) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:35,688 INFO L93 Difference]: Finished difference Result 177300 states and 773804 transitions. [2022-11-16 11:50:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:50:35,691 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) Word has length 1 [2022-11-16 11:50:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:37,921 INFO L225 Difference]: With dead ends: 177300 [2022-11-16 11:50:37,921 INFO L226 Difference]: Without dead ends: 177300 [2022-11-16 11:50:37,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:50:37,927 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:37,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:50:39,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177300 states. [2022-11-16 11:50:48,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177300 to 177300. [2022-11-16 11:50:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177300 states, 177285 states have (on average 4.3647460304030234) internal successors, (773804), 177299 states have internal predecessors, (773804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177300 states to 177300 states and 773804 transitions. [2022-11-16 11:50:51,968 INFO L78 Accepts]: Start accepts. Automaton has 177300 states and 773804 transitions. Word has length 1 [2022-11-16 11:50:51,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:51,969 INFO L495 AbstractCegarLoop]: Abstraction has 177300 states and 773804 transitions. [2022-11-16 11:50:51,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:51,979 INFO L276 IsEmpty]: Start isEmpty. Operand 177300 states and 773804 transitions. [2022-11-16 11:50:51,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:50:51,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:51,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:50:51,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:50:51,983 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 11:50:51,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:51,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1162046, now seen corresponding path program 1 times [2022-11-16 11:50:51,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:51,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731128247] [2022-11-16 11:50:51,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:51,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:52,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:52,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731128247] [2022-11-16 11:50:52,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731128247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:52,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:52,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:50:52,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89263292] [2022-11-16 11:50:52,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:52,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:50:52,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:52,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:50:52,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:50:52,612 INFO L87 Difference]: Start difference. First operand 177300 states and 773804 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:56,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:56,005 INFO L93 Difference]: Finished difference Result 174542 states and 763389 transitions. [2022-11-16 11:50:56,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:50:56,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) Word has length 3 [2022-11-16 11:50:56,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:57,359 INFO L225 Difference]: With dead ends: 174542 [2022-11-16 11:50:57,359 INFO L226 Difference]: Without dead ends: 174542 [2022-11-16 11:50:57,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:50:57,361 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 79 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:57,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 16 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:50:58,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174542 states. [2022-11-16 11:51:05,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174542 to 174542. [2022-11-16 11:51:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174542 states, 174529 states have (on average 4.373995152668038) internal successors, (763389), 174541 states have internal predecessors, (763389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174542 states to 174542 states and 763389 transitions. [2022-11-16 11:51:08,717 INFO L78 Accepts]: Start accepts. Automaton has 174542 states and 763389 transitions. Word has length 3 [2022-11-16 11:51:08,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:08,718 INFO L495 AbstractCegarLoop]: Abstraction has 174542 states and 763389 transitions. [2022-11-16 11:51:08,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:08,725 INFO L276 IsEmpty]: Start isEmpty. Operand 174542 states and 763389 transitions. [2022-11-16 11:51:08,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:51:08,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:08,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:51:08,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:51:08,727 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 11:51:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:08,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1162047, now seen corresponding path program 1 times [2022-11-16 11:51:08,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:08,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527495920] [2022-11-16 11:51:08,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:08,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:51:09,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:09,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527495920] [2022-11-16 11:51:09,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527495920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:51:09,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:51:09,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:51:09,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346005061] [2022-11-16 11:51:09,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:51:09,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:51:09,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:09,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:51:09,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:51:09,108 INFO L87 Difference]: Start difference. First operand 174542 states and 763389 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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)