./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_5996d8d0-348e-4788-b8bb-f283cc9ee717/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5996d8d0-348e-4788-b8bb-f283cc9ee717/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5996d8d0-348e-4788-b8bb-f283cc9ee717/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5996d8d0-348e-4788-b8bb-f283cc9ee717/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5996d8d0-348e-4788-b8bb-f283cc9ee717/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5996d8d0-348e-4788-b8bb-f283cc9ee717/bin/utaipan-g80aRyZoba --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22b51332425cd14048935a20a73abea0065b1633fac56d6d6be511ab67585236 --- 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-b5237d8 [2022-11-22 01:52:00,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:52:00,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:52:00,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:52:00,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:52:00,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:52:00,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:52:00,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:52:00,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:52:00,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:52:00,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:52:00,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:52:00,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:52:00,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:52:00,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:52:00,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:52:00,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:52:00,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:52:00,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:52:00,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:52:00,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:52:00,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:52:00,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:52:00,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:52:00,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:52:00,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:52:00,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:52:00,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:52:00,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:52:00,702 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:52:00,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:52:00,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:52:00,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:52:00,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:52:00,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:52:00,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:52:00,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:52:00,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:52:00,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:52:00,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:52:00,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:52:00,715 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5996d8d0-348e-4788-b8bb-f283cc9ee717/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 01:52:00,755 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:52:00,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:52:00,755 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:52:00,756 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:52:00,756 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:52:00,756 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:52:00,757 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:52:00,757 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:52:00,757 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:52:00,757 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:52:00,758 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:52:00,758 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:52:00,758 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:52:00,758 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:52:00,759 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:52:00,759 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:52:00,759 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:52:00,759 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:52:00,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:52:00,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:52:00,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:52:00,761 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:52:00,761 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:52:00,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:52:00,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:52:00,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:52:00,762 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:52:00,762 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:52:00,762 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:52:00,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:52:00,763 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:52:00,763 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:52:00,763 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:52:00,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:52:00,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:52:00,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:52:00,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:52:00,765 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:52:00,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:52:00,765 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:52:00,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:52:00,765 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:52:00,766 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_5996d8d0-348e-4788-b8bb-f283cc9ee717/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5996d8d0-348e-4788-b8bb-f283cc9ee717/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22b51332425cd14048935a20a73abea0065b1633fac56d6d6be511ab67585236 [2022-11-22 01:52:01,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:52:01,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:52:01,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:52:01,054 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:52:01,055 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:52:01,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5996d8d0-348e-4788-b8bb-f283cc9ee717/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c [2022-11-22 01:52:04,240 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:52:04,478 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:52:04,479 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5996d8d0-348e-4788-b8bb-f283cc9ee717/sv-benchmarks/c/weaver/parallel-barrier.wvr.c [2022-11-22 01:52:04,487 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5996d8d0-348e-4788-b8bb-f283cc9ee717/bin/utaipan-g80aRyZoba/data/7b9d87012/cf5ae0eea0594026974259b68e9475b6/FLAG37d551799 [2022-11-22 01:52:04,500 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5996d8d0-348e-4788-b8bb-f283cc9ee717/bin/utaipan-g80aRyZoba/data/7b9d87012/cf5ae0eea0594026974259b68e9475b6 [2022-11-22 01:52:04,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:52:04,505 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:52:04,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:52:04,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:52:04,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:52:04,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:52:04" (1/1) ... [2022-11-22 01:52:04,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e8d4344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:04, skipping insertion in model container [2022-11-22 01:52:04,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:52:04" (1/1) ... [2022-11-22 01:52:04,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:52:04,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:52:04,737 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_5996d8d0-348e-4788-b8bb-f283cc9ee717/sv-benchmarks/c/weaver/parallel-barrier.wvr.c[4722,4735] [2022-11-22 01:52:04,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:52:04,757 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:52:04,789 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_5996d8d0-348e-4788-b8bb-f283cc9ee717/sv-benchmarks/c/weaver/parallel-barrier.wvr.c[4722,4735] [2022-11-22 01:52:04,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:52:04,804 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:52:04,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:04 WrapperNode [2022-11-22 01:52:04,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:52:04,806 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:52:04,806 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:52:04,806 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:52:04,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:04" (1/1) ... [2022-11-22 01:52:04,821 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:04" (1/1) ... [2022-11-22 01:52:04,849 INFO L138 Inliner]: procedures = 25, calls = 98, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 253 [2022-11-22 01:52:04,849 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:52:04,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:52:04,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:52:04,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:52:04,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:04" (1/1) ... [2022-11-22 01:52:04,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:04" (1/1) ... [2022-11-22 01:52:04,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:04" (1/1) ... [2022-11-22 01:52:04,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:04" (1/1) ... [2022-11-22 01:52:04,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:04" (1/1) ... [2022-11-22 01:52:04,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:04" (1/1) ... [2022-11-22 01:52:04,877 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:04" (1/1) ... [2022-11-22 01:52:04,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:04" (1/1) ... [2022-11-22 01:52:04,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:52:04,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:52:04,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:52:04,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:52:04,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:04" (1/1) ... [2022-11-22 01:52:04,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:52:04,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5996d8d0-348e-4788-b8bb-f283cc9ee717/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:52:04,923 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5996d8d0-348e-4788-b8bb-f283cc9ee717/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:52:04,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5996d8d0-348e-4788-b8bb-f283cc9ee717/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:52:04,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:52:04,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:52:04,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:52:04,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:52:04,979 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-22 01:52:04,979 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-22 01:52:04,979 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-22 01:52:04,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-22 01:52:04,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-22 01:52:04,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-22 01:52:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-22 01:52:04,981 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-22 01:52:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:52:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-11-22 01:52:04,982 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-11-22 01:52:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-11-22 01:52:04,983 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-11-22 01:52:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-22 01:52:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-22 01:52:04,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:52:04,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:52:04,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:52:04,987 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-22 01:52:05,105 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:52:05,114 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:52:05,650 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:52:05,718 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:52:05,719 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 01:52:05,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:52:05 BoogieIcfgContainer [2022-11-22 01:52:05,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:52:05,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:52:05,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:52:05,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:52:05,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:52:04" (1/3) ... [2022-11-22 01:52:05,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5ae94c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:52:05, skipping insertion in model container [2022-11-22 01:52:05,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:04" (2/3) ... [2022-11-22 01:52:05,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5ae94c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:52:05, skipping insertion in model container [2022-11-22 01:52:05,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:52:05" (3/3) ... [2022-11-22 01:52:05,730 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier.wvr.c [2022-11-22 01:52:05,758 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:52:05,758 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-11-22 01:52:05,758 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-22 01:52:06,003 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2022-11-22 01:52:06,052 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 01:52:06,077 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 267 transitions, 606 flow [2022-11-22 01:52:06,080 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 267 transitions, 606 flow [2022-11-22 01:52:06,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 267 transitions, 606 flow [2022-11-22 01:52:06,229 INFO L130 PetriNetUnfolder]: 8/235 cut-off events. [2022-11-22 01:52:06,229 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-22 01:52:06,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 235 events. 8/235 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 366 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 198. Up to 3 conditions per place. [2022-11-22 01:52:06,249 INFO L119 LiptonReduction]: Number of co-enabled transitions 10984 [2022-11-22 01:52:13,930 INFO L134 LiptonReduction]: Checked pairs total: 66082 [2022-11-22 01:52:13,931 INFO L136 LiptonReduction]: Total number of compositions: 196 [2022-11-22 01:52:13,947 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 128 places, 113 transitions, 298 flow [2022-11-22 01:52:19,253 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 113233 states, 112951 states have (on average 4.95025276447309) internal successors, (559136), 113232 states have internal predecessors, (559136), 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) [2022-11-22 01:52:19,282 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:52:19,291 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;@1d438073, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:52:19,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2022-11-22 01:52:19,789 INFO L276 IsEmpty]: Start isEmpty. Operand has 113233 states, 112951 states have (on average 4.95025276447309) internal successors, (559136), 113232 states have internal predecessors, (559136), 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) [2022-11-22 01:52:19,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-22 01:52:19,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:19,795 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-22 01:52:19,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-22 01:52:19,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:19,802 INFO L85 PathProgramCache]: Analyzing trace with hash 930, now seen corresponding path program 1 times [2022-11-22 01:52:19,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:19,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959388946] [2022-11-22 01:52:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:19,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:19,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:19,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959388946] [2022-11-22 01:52:19,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959388946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:19,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:19,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-22 01:52:19,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271556460] [2022-11-22 01:52:19,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:19,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 01:52:19,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:19,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 01:52:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:52:20,191 INFO L87 Difference]: Start difference. First operand has 113233 states, 112951 states have (on average 4.95025276447309) internal successors, (559136), 113232 states have internal predecessors, (559136), 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) [2022-11-22 01:52:22,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:22,829 INFO L93 Difference]: Finished difference Result 113230 states and 559133 transitions. [2022-11-22 01:52:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 01:52:22,831 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 [2022-11-22 01:52:22,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:24,647 INFO L225 Difference]: With dead ends: 113230 [2022-11-22 01:52:24,647 INFO L226 Difference]: Without dead ends: 113230 [2022-11-22 01:52:24,651 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 [2022-11-22 01:52:24,655 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:24,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:52:24,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113230 states. [2022-11-22 01:52:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113230 to 113230. [2022-11-22 01:52:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113230 states, 112951 states have (on average 4.950226204283274) internal successors, (559133), 113229 states have internal predecessors, (559133), 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) [2022-11-22 01:52:32,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113230 states to 113230 states and 559133 transitions. [2022-11-22 01:52:32,040 INFO L78 Accepts]: Start accepts. Automaton has 113230 states and 559133 transitions. Word has length 1 [2022-11-22 01:52:32,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:32,041 INFO L495 AbstractCegarLoop]: Abstraction has 113230 states and 559133 transitions. [2022-11-22 01:52:32,041 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) [2022-11-22 01:52:32,041 INFO L276 IsEmpty]: Start isEmpty. Operand 113230 states and 559133 transitions. [2022-11-22 01:52:32,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:52:32,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:32,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:52:32,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:52:32,043 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-22 01:52:32,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:32,044 INFO L85 PathProgramCache]: Analyzing trace with hash 880616820, now seen corresponding path program 1 times [2022-11-22 01:52:32,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:32,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491302548] [2022-11-22 01:52:32,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:32,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:32,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:32,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491302548] [2022-11-22 01:52:32,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491302548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:32,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:32,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:52:32,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083814118] [2022-11-22 01:52:32,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:32,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:52:32,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:32,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:52:32,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:52:32,245 INFO L87 Difference]: Start difference. First operand 113230 states and 559133 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-22 01:52:35,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:35,023 INFO L93 Difference]: Finished difference Result 114721 states and 564278 transitions. [2022-11-22 01:52:35,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:52:35,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-11-22 01:52:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:35,956 INFO L225 Difference]: With dead ends: 114721 [2022-11-22 01:52:35,956 INFO L226 Difference]: Without dead ends: 114721 [2022-11-22 01:52:35,956 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 [2022-11-22 01:52:35,958 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:35,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 39 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:52:36,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114721 states. [2022-11-22 01:52:41,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114721 to 113561. [2022-11-22 01:52:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113561 states, 113290 states have (on average 4.948901050401624) internal successors, (560661), 113560 states have internal predecessors, (560661), 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) [2022-11-22 01:52:42,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113561 states to 113561 states and 560661 transitions. [2022-11-22 01:52:42,585 INFO L78 Accepts]: Start accepts. Automaton has 113561 states and 560661 transitions. Word has length 5 [2022-11-22 01:52:42,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:42,585 INFO L495 AbstractCegarLoop]: Abstraction has 113561 states and 560661 transitions. [2022-11-22 01:52:42,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-22 01:52:42,586 INFO L276 IsEmpty]: Start isEmpty. Operand 113561 states and 560661 transitions. [2022-11-22 01:52:42,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:52:42,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:42,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:52:42,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:52:42,587 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-22 01:52:42,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:42,588 INFO L85 PathProgramCache]: Analyzing trace with hash 880616821, now seen corresponding path program 1 times [2022-11-22 01:52:42,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:42,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308992618] [2022-11-22 01:52:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:42,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:42,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:42,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308992618] [2022-11-22 01:52:42,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308992618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:42,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:42,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:52:42,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61998139] [2022-11-22 01:52:42,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:42,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:52:42,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:42,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:52:42,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:52:42,837 INFO L87 Difference]: Start difference. First operand 113561 states and 560661 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-22 01:52:45,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:45,376 INFO L93 Difference]: Finished difference Result 113227 states and 559458 transitions. [2022-11-22 01:52:45,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:52:45,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-11-22 01:52:45,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:46,628 INFO L225 Difference]: With dead ends: 113227 [2022-11-22 01:52:46,628 INFO L226 Difference]: Without dead ends: 113227 [2022-11-22 01:52:46,629 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 [2022-11-22 01:52:46,630 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 79 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:46,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 19 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:52:46,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113227 states. [2022-11-22 01:52:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113227 to 113227. [2022-11-22 01:52:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113227 states, 112974 states have (on average 4.952095172340538) internal successors, (559458), 113226 states have internal predecessors, (559458), 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) [2022-11-22 01:52:52,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113227 states to 113227 states and 559458 transitions. [2022-11-22 01:52:52,425 INFO L78 Accepts]: Start accepts. Automaton has 113227 states and 559458 transitions. Word has length 5 [2022-11-22 01:52:52,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:52,425 INFO L495 AbstractCegarLoop]: Abstraction has 113227 states and 559458 transitions. [2022-11-22 01:52:52,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-22 01:52:52,425 INFO L276 IsEmpty]: Start isEmpty. Operand 113227 states and 559458 transitions. [2022-11-22 01:52:52,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:52:52,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:52,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:52,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:52:52,426 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-22 01:52:52,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:52,427 INFO L85 PathProgramCache]: Analyzing trace with hash 164227567, now seen corresponding path program 1 times [2022-11-22 01:52:52,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:52,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649211969] [2022-11-22 01:52:52,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:52,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:52,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:52,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649211969] [2022-11-22 01:52:52,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649211969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:52,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:52,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:52:52,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121403491] [2022-11-22 01:52:52,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:52,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:52:52,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:52,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:52:52,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:52:52,553 INFO L87 Difference]: Start difference. First operand 113227 states and 559458 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-22 01:52:54,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:54,296 INFO L93 Difference]: Finished difference Result 85338 states and 413836 transitions. [2022-11-22 01:52:54,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:52:54,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-11-22 01:52:54,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:54,936 INFO L225 Difference]: With dead ends: 85338 [2022-11-22 01:52:54,936 INFO L226 Difference]: Without dead ends: 85338 [2022-11-22 01:52:54,937 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 [2022-11-22 01:52:54,938 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 76 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:54,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 20 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:52:55,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85338 states.