./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-1.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_1c416a8f-86f7-4534-bcb2-d769533f3e89/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c416a8f-86f7-4534-bcb2-d769533f3e89/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_1c416a8f-86f7-4534-bcb2-d769533f3e89/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c416a8f-86f7-4534-bcb2-d769533f3e89/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c416a8f-86f7-4534-bcb2-d769533f3e89/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_1c416a8f-86f7-4534-bcb2-d769533f3e89/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 e0278abdbbb57b3938e33a237527cf3a8d14feaf8eba047d58da36569d27728f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:57:33,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:57:33,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:57:33,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:57:33,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:57:33,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:57:33,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:57:33,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:57:33,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:57:33,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:57:33,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:57:33,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:57:33,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:57:33,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:57:33,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:57:33,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:57:33,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:57:33,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:57:33,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:57:33,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:57:33,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:57:33,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:57:33,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:57:33,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:57:33,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:57:33,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:57:33,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:57:33,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:57:33,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:57:33,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:57:33,441 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:57:33,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:57:33,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:57:33,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:57:33,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:57:33,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:57:33,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:57:33,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:57:33,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:57:33,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:57:33,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:57:33,450 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c416a8f-86f7-4534-bcb2-d769533f3e89/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:57:33,484 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:57:33,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:57:33,486 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:57:33,486 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:57:33,488 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:57:33,491 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:57:33,491 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:57:33,492 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:57:33,492 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:57:33,492 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:57:33,492 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:57:33,492 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:57:33,493 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:57:33,493 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:57:33,493 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:57:33,493 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:57:33,493 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:57:33,494 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:57:33,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:57:33,496 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:57:33,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:57:33,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:57:33,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:57:33,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:57:33,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:57:33,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:57:33,498 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:57:33,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:57:33,499 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:57:33,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:57:33,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:57:33,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:57:33,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:57:33,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:57:33,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:57:33,501 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:57:33,501 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:57:33,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:57:33,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:57:33,501 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:57:33,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:57:33,502 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_1c416a8f-86f7-4534-bcb2-d769533f3e89/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c416a8f-86f7-4534-bcb2-d769533f3e89/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0278abdbbb57b3938e33a237527cf3a8d14feaf8eba047d58da36569d27728f [2021-11-25 18:57:33,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:57:33,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:57:33,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:57:33,840 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:57:33,841 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:57:33,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c416a8f-86f7-4534-bcb2-d769533f3e89/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-1.c [2021-11-25 18:57:33,933 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c416a8f-86f7-4534-bcb2-d769533f3e89/bin/utaipan-eEHZpOm5b7/data/2450acb54/f2d20e6769f54a15be05c93e34a5e028/FLAGb942e4eb4 [2021-11-25 18:57:34,672 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:57:34,673 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c416a8f-86f7-4534-bcb2-d769533f3e89/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-1.c [2021-11-25 18:57:34,706 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c416a8f-86f7-4534-bcb2-d769533f3e89/bin/utaipan-eEHZpOm5b7/data/2450acb54/f2d20e6769f54a15be05c93e34a5e028/FLAGb942e4eb4 [2021-11-25 18:57:34,795 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c416a8f-86f7-4534-bcb2-d769533f3e89/bin/utaipan-eEHZpOm5b7/data/2450acb54/f2d20e6769f54a15be05c93e34a5e028 [2021-11-25 18:57:34,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:57:34,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:57:34,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:57:34,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:57:34,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:57:34,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:57:34" (1/1) ... [2021-11-25 18:57:34,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f6f1018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:34, skipping insertion in model container [2021-11-25 18:57:34,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:57:34" (1/1) ... [2021-11-25 18:57:34,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:57:34,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:57:35,104 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_1c416a8f-86f7-4534-bcb2-d769533f3e89/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-1.c[1765,1778] [2021-11-25 18:57:35,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:57:35,585 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:57:35,599 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_1c416a8f-86f7-4534-bcb2-d769533f3e89/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-1.c[1765,1778] [2021-11-25 18:57:35,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:57:35,843 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:57:35,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:35 WrapperNode [2021-11-25 18:57:35,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:57:35,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:57:35,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:57:35,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:57:35,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:35" (1/1) ... [2021-11-25 18:57:35,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:35" (1/1) ... [2021-11-25 18:57:36,093 INFO L137 Inliner]: procedures = 60, calls = 2524, calls flagged for inlining = 22, calls inlined = 22, statements flattened = 4783 [2021-11-25 18:57:36,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:57:36,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:57:36,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:57:36,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:57:36,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:35" (1/1) ... [2021-11-25 18:57:36,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:35" (1/1) ... [2021-11-25 18:57:36,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:35" (1/1) ... [2021-11-25 18:57:36,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:35" (1/1) ... [2021-11-25 18:57:36,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:35" (1/1) ... [2021-11-25 18:57:36,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:35" (1/1) ... [2021-11-25 18:57:36,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:35" (1/1) ... [2021-11-25 18:57:36,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:57:36,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:57:36,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:57:36,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:57:36,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:35" (1/1) ... [2021-11-25 18:57:36,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:57:36,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c416a8f-86f7-4534-bcb2-d769533f3e89/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:36,413 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c416a8f-86f7-4534-bcb2-d769533f3e89/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:57:36,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c416a8f-86f7-4534-bcb2-d769533f3e89/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:57:36,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:57:36,465 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2021-11-25 18:57:36,465 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2021-11-25 18:57:36,466 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2021-11-25 18:57:36,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2021-11-25 18:57:36,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:57:36,466 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2021-11-25 18:57:36,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2021-11-25 18:57:36,467 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2021-11-25 18:57:36,467 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2021-11-25 18:57:36,467 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_observer_obstacle_flag [2021-11-25 18:57:36,467 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_observer_obstacle_flag [2021-11-25 18:57:36,467 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2021-11-25 18:57:36,467 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2021-11-25 18:57:36,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:57:36,468 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2021-11-25 18:57:36,468 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2021-11-25 18:57:36,468 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2021-11-25 18:57:36,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2021-11-25 18:57:36,469 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2021-11-25 18:57:36,469 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2021-11-25 18:57:36,469 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2021-11-25 18:57:36,469 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2021-11-25 18:57:36,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:57:36,470 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2021-11-25 18:57:36,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2021-11-25 18:57:36,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:57:36,470 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-11-25 18:57:36,471 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2021-11-25 18:57:36,471 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2021-11-25 18:57:36,471 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2021-11-25 18:57:36,473 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_obstacle_flag [2021-11-25 18:57:36,473 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_obstacle_flag [2021-11-25 18:57:36,473 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 18:57:36,473 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 18:57:36,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:57:36,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:57:36,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:57:36,474 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2021-11-25 18:57:36,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2021-11-25 18:57:36,474 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2021-11-25 18:57:36,474 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2021-11-25 18:57:36,474 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2021-11-25 18:57:36,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2021-11-25 18:57:37,167 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:57:37,170 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:57:45,982 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:57:46,338 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:57:46,338 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:57:46,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:57:46 BoogieIcfgContainer [2021-11-25 18:57:46,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:57:46,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:57:46,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:57:46,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:57:46,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:57:34" (1/3) ... [2021-11-25 18:57:46,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10389d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:57:46, skipping insertion in model container [2021-11-25 18:57:46,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:35" (2/3) ... [2021-11-25 18:57:46,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10389d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:57:46, skipping insertion in model container [2021-11-25 18:57:46,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:57:46" (3/3) ... [2021-11-25 18:57:46,354 INFO L111 eAbstractionObserver]: Analyzing ICFG rekh_nxt.2.M1-1.c [2021-11-25 18:57:46,359 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:57:46,369 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:57:46,449 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:57:46,458 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 18:57:46,458 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:57:46,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 1893 states, 1101 states have (on average 1.2052679382379654) internal successors, (1327), 1106 states have internal predecessors, (1327), 772 states have call successors, (772), 18 states have call predecessors, (772), 18 states have return successors, (772), 770 states have call predecessors, (772), 772 states have call successors, (772) [2021-11-25 18:57:46,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 883 [2021-11-25 18:57:46,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:46,636 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 18:57:46,636 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:46,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:46,648 INFO L85 PathProgramCache]: Analyzing trace with hash 962128900, now seen corresponding path program 1 times [2021-11-25 18:57:46,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:46,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345240082] [2021-11-25 18:57:46,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:46,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms