./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4057030c-f409-46a5-a1ba-e8dc880e65ef/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4057030c-f409-46a5-a1ba-e8dc880e65ef/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4057030c-f409-46a5-a1ba-e8dc880e65ef/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4057030c-f409-46a5-a1ba-e8dc880e65ef/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4057030c-f409-46a5-a1ba-e8dc880e65ef/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4057030c-f409-46a5-a1ba-e8dc880e65ef/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a1eb342ebadad5f5d28e5fd9eb503795cab40e31c0a35c7b5f4b6a3c65ed5e13 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:48:08,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:48:08,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:48:08,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:48:08,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:48:08,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:48:08,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:48:08,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:48:08,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:48:08,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:48:08,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:48:08,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:48:08,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:48:08,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:48:08,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:48:08,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:48:08,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:48:08,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:48:08,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:48:08,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:48:08,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:48:08,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:48:08,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:48:08,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:48:08,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:48:08,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:48:08,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:48:08,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:48:08,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:48:08,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:48:08,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:48:08,616 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:48:08,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:48:08,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:48:08,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:48:08,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:48:08,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:48:08,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:48:08,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:48:08,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:48:08,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:48:08,625 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4057030c-f409-46a5-a1ba-e8dc880e65ef/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:48:08,665 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:48:08,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:48:08,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:48:08,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:48:08,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:48:08,673 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:48:08,674 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:48:08,674 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:48:08,674 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:48:08,675 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:48:08,676 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:48:08,676 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:48:08,677 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:48:08,677 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:48:08,677 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:48:08,678 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:48:08,678 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:48:08,678 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:48:08,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:48:08,680 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:48:08,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:48:08,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:48:08,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:48:08,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:48:08,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:48:08,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:48:08,683 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:48:08,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:48:08,684 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:48:08,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:48:08,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:48:08,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:48:08,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:48:08,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:48:08,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:48:08,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:48:08,686 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:48:08,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:48:08,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:48:08,687 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:48:08,687 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:48:08,688 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_4057030c-f409-46a5-a1ba-e8dc880e65ef/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4057030c-f409-46a5-a1ba-e8dc880e65ef/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1eb342ebadad5f5d28e5fd9eb503795cab40e31c0a35c7b5f4b6a3c65ed5e13 [2021-11-25 19:48:08,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:48:09,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:48:09,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:48:09,023 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:48:09,024 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:48:09,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4057030c-f409-46a5-a1ba-e8dc880e65ef/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-2.c [2021-11-25 19:48:09,087 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4057030c-f409-46a5-a1ba-e8dc880e65ef/bin/utaipan-eEHZpOm5b7/data/a1831b3d5/267720881b934d0abf3d9b2a0fa20329/FLAGda73321b7 [2021-11-25 19:48:09,830 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:48:09,831 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4057030c-f409-46a5-a1ba-e8dc880e65ef/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-2.c [2021-11-25 19:48:09,858 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4057030c-f409-46a5-a1ba-e8dc880e65ef/bin/utaipan-eEHZpOm5b7/data/a1831b3d5/267720881b934d0abf3d9b2a0fa20329/FLAGda73321b7 [2021-11-25 19:48:09,961 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4057030c-f409-46a5-a1ba-e8dc880e65ef/bin/utaipan-eEHZpOm5b7/data/a1831b3d5/267720881b934d0abf3d9b2a0fa20329 [2021-11-25 19:48:09,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:48:09,966 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:48:09,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:48:09,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:48:09,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:48:09,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:48:09" (1/1) ... [2021-11-25 19:48:09,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13e3bcd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:09, skipping insertion in model container [2021-11-25 19:48:09,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:48:09" (1/1) ... [2021-11-25 19:48:09,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:48:10,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:48:10,280 WARN L230 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_4057030c-f409-46a5-a1ba-e8dc880e65ef/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-2.c[1682,1695] [2021-11-25 19:48:10,694 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:48:10,704 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:48:10,718 WARN L230 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_4057030c-f409-46a5-a1ba-e8dc880e65ef/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-2.c[1682,1695] [2021-11-25 19:48:10,953 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:48:10,974 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:48:10,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:10 WrapperNode [2021-11-25 19:48:10,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:48:10,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:48:10,976 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:48:10,976 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:48:10,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:10" (1/1) ... [2021-11-25 19:48:11,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:10" (1/1) ... [2021-11-25 19:48:11,243 INFO L137 Inliner]: procedures = 56, calls = 2059, calls flagged for inlining = 22, calls inlined = 22, statements flattened = 4010 [2021-11-25 19:48:11,243 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:48:11,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:48:11,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:48:11,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:48:11,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:10" (1/1) ... [2021-11-25 19:48:11,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:10" (1/1) ... [2021-11-25 19:48:11,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:10" (1/1) ... [2021-11-25 19:48:11,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:10" (1/1) ... [2021-11-25 19:48:11,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:10" (1/1) ... [2021-11-25 19:48:11,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:10" (1/1) ... [2021-11-25 19:48:11,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:10" (1/1) ... [2021-11-25 19:48:11,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:48:11,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:48:11,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:48:11,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:48:11,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:10" (1/1) ... [2021-11-25 19:48:11,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:48:11,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4057030c-f409-46a5-a1ba-e8dc880e65ef/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:11,522 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4057030c-f409-46a5-a1ba-e8dc880e65ef/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:48:11,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4057030c-f409-46a5-a1ba-e8dc880e65ef/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:48:11,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:48:11,573 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2021-11-25 19:48:11,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2021-11-25 19:48:11,574 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2021-11-25 19:48:11,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2021-11-25 19:48:11,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:48:11,574 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2021-11-25 19:48:11,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2021-11-25 19:48:11,575 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2021-11-25 19:48:11,575 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2021-11-25 19:48:11,575 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2021-11-25 19:48:11,575 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2021-11-25 19:48:11,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:48:11,575 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2021-11-25 19:48:11,576 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2021-11-25 19:48:11,576 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2021-11-25 19:48:11,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2021-11-25 19:48:11,576 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2021-11-25 19:48:11,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2021-11-25 19:48:11,576 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2021-11-25 19:48:11,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2021-11-25 19:48:11,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:48:11,577 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2021-11-25 19:48:11,577 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2021-11-25 19:48:11,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:48:11,577 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-11-25 19:48:11,577 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2021-11-25 19:48:11,578 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2021-11-25 19:48:11,578 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2021-11-25 19:48:11,578 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:48:11,578 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:48:11,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:48:11,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:48:11,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:48:11,579 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2021-11-25 19:48:11,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2021-11-25 19:48:11,579 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2021-11-25 19:48:11,580 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2021-11-25 19:48:11,580 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2021-11-25 19:48:11,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2021-11-25 19:48:12,129 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:48:12,131 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:48:19,281 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:48:19,640 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:48:19,640 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:48:19,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:48:19 BoogieIcfgContainer [2021-11-25 19:48:19,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:48:19,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:48:19,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:48:19,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:48:19,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:48:09" (1/3) ... [2021-11-25 19:48:19,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc6678a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:48:19, skipping insertion in model container [2021-11-25 19:48:19,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:10" (2/3) ... [2021-11-25 19:48:19,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc6678a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:48:19, skipping insertion in model container [2021-11-25 19:48:19,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:48:19" (3/3) ... [2021-11-25 19:48:19,657 INFO L111 eAbstractionObserver]: Analyzing ICFG rekh_nxt.2.M1-2.c [2021-11-25 19:48:19,662 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:48:19,663 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:48:19,729 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:48:19,737 INFO L339 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:48:19,738 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:48:19,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 1612 states, 956 states have (on average 1.2290794979079498) internal successors, (1175), 961 states have internal predecessors, (1175), 638 states have call successors, (638), 16 states have call predecessors, (638), 16 states have return successors, (638), 636 states have call predecessors, (638), 638 states have call successors, (638) [2021-11-25 19:48:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 883 [2021-11-25 19:48:19,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:19,877 INFO L514 BasicCegarLoop]: trace histogram [209, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:19,877 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:19,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1881620003, now seen corresponding path program 1 times [2021-11-25 19:48:19,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:19,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896994355] [2021-11-25 19:48:19,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:19,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms