./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 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f687d-0360-4013-8840-075336d93807/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f687d-0360-4013-8840-075336d93807/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f687d-0360-4013-8840-075336d93807/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f687d-0360-4013-8840-075336d93807/bin/utaipan-Q6hlc19bkW/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_855f687d-0360-4013-8840-075336d93807/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f687d-0360-4013-8840-075336d93807/bin/utaipan-Q6hlc19bkW --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 --- [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-4e7fbc6 [2022-11-23 14:09:25,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:09:25,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:09:25,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:09:25,054 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:09:25,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:09:25,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:09:25,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:09:25,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:09:25,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:09:25,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:09:25,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:09:25,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:09:25,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:09:25,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:09:25,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:09:25,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:09:25,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:09:25,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:09:25,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:09:25,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:09:25,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:09:25,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:09:25,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:09:25,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:09:25,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:09:25,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:09:25,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:09:25,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:09:25,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:09:25,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:09:25,094 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:09:25,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:09:25,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:09:25,097 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:09:25,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:09:25,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:09:25,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:09:25,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:09:25,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:09:25,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:09:25,101 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f687d-0360-4013-8840-075336d93807/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:09:25,120 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:09:25,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:09:25,121 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:09:25,121 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:09:25,122 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:09:25,122 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:09:25,122 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:09:25,122 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:09:25,123 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:09:25,123 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:09:25,123 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:09:25,123 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:09:25,124 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:09:25,124 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:09:25,124 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:09:25,124 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:09:25,125 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:09:25,125 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:09:25,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:09:25,126 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:09:25,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:09:25,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:09:25,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:09:25,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:09:25,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:09:25,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:09:25,127 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:09:25,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:09:25,128 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:09:25,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:09:25,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:09:25,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:09:25,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:09:25,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:09:25,129 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:09:25,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:09:25,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:09:25,130 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:09:25,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:09:25,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:09:25,131 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:09:25,131 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_855f687d-0360-4013-8840-075336d93807/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f687d-0360-4013-8840-075336d93807/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0278abdbbb57b3938e33a237527cf3a8d14feaf8eba047d58da36569d27728f [2022-11-23 14:09:25,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:09:25,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:09:25,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:09:25,448 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:09:25,448 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:09:25,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f687d-0360-4013-8840-075336d93807/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-1.c [2022-11-23 14:09:28,443 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:09:28,798 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:09:28,802 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f687d-0360-4013-8840-075336d93807/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-1.c [2022-11-23 14:09:28,851 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f687d-0360-4013-8840-075336d93807/bin/utaipan-Q6hlc19bkW/data/387d5efda/c4638f2ff5f34f81a1d77cb2ab1b433a/FLAG8ad89f768 [2022-11-23 14:09:28,867 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f687d-0360-4013-8840-075336d93807/bin/utaipan-Q6hlc19bkW/data/387d5efda/c4638f2ff5f34f81a1d77cb2ab1b433a [2022-11-23 14:09:28,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:09:28,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:09:28,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:09:28,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:09:28,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:09:28,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:09:28" (1/1) ... [2022-11-23 14:09:28,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60059f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:28, skipping insertion in model container [2022-11-23 14:09:28,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:09:28" (1/1) ... [2022-11-23 14:09:28,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:09:28,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:09:29,125 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_855f687d-0360-4013-8840-075336d93807/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-1.c[1765,1778] [2022-11-23 14:09:29,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:09:29,597 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:09:29,617 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_855f687d-0360-4013-8840-075336d93807/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-1.c[1765,1778] [2022-11-23 14:09:29,885 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:09:29,907 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:09:29,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:29 WrapperNode [2022-11-23 14:09:29,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:09:29,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:09:29,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:09:29,909 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:09:29,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:29" (1/1) ... [2022-11-23 14:09:29,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:29" (1/1) ... [2022-11-23 14:09:30,168 INFO L138 Inliner]: procedures = 60, calls = 2524, calls flagged for inlining = 22, calls inlined = 22, statements flattened = 4783 [2022-11-23 14:09:30,168 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:09:30,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:09:30,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:09:30,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:09:30,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:29" (1/1) ... [2022-11-23 14:09:30,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:29" (1/1) ... [2022-11-23 14:09:30,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:29" (1/1) ... [2022-11-23 14:09:30,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:29" (1/1) ... [2022-11-23 14:09:30,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:29" (1/1) ... [2022-11-23 14:09:30,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:29" (1/1) ... [2022-11-23 14:09:30,376 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:29" (1/1) ... [2022-11-23 14:09:30,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:29" (1/1) ... [2022-11-23 14:09:30,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:09:30,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:09:30,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:09:30,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:09:30,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:29" (1/1) ... [2022-11-23 14:09:30,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:09:30,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f687d-0360-4013-8840-075336d93807/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:30,466 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f687d-0360-4013-8840-075336d93807/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:09:30,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f687d-0360-4013-8840-075336d93807/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:09:30,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:09:30,516 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2022-11-23 14:09:30,516 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2022-11-23 14:09:30,516 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2022-11-23 14:09:30,516 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2022-11-23 14:09:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:09:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2022-11-23 14:09:30,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2022-11-23 14:09:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2022-11-23 14:09:30,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2022-11-23 14:09:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_observer_obstacle_flag [2022-11-23 14:09:30,518 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_observer_obstacle_flag [2022-11-23 14:09:30,518 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2022-11-23 14:09:30,518 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2022-11-23 14:09:30,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:09:30,518 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2022-11-23 14:09:30,518 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2022-11-23 14:09:30,518 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2022-11-23 14:09:30,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2022-11-23 14:09:30,519 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-11-23 14:09:30,519 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-11-23 14:09:30,519 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-11-23 14:09:30,520 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-11-23 14:09:30,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:09:30,520 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2022-11-23 14:09:30,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2022-11-23 14:09:30,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:09:30,521 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-11-23 14:09:30,522 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-11-23 14:09:30,522 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2022-11-23 14:09:30,522 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2022-11-23 14:09:30,522 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_obstacle_flag [2022-11-23 14:09:30,522 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_obstacle_flag [2022-11-23 14:09:30,522 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 14:09:30,523 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 14:09:30,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:09:30,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:09:30,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:09:30,523 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2022-11-23 14:09:30,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2022-11-23 14:09:30,524 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2022-11-23 14:09:30,524 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2022-11-23 14:09:30,524 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2022-11-23 14:09:30,524 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2022-11-23 14:09:31,242 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:09:31,246 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:09:39,769 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:09:40,142 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:09:40,142 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 14:09:40,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:09:40 BoogieIcfgContainer [2022-11-23 14:09:40,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:09:40,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:09:40,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:09:40,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:09:40,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:09:28" (1/3) ... [2022-11-23 14:09:40,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78cd3dd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:09:40, skipping insertion in model container [2022-11-23 14:09:40,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:29" (2/3) ... [2022-11-23 14:09:40,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78cd3dd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:09:40, skipping insertion in model container [2022-11-23 14:09:40,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:09:40" (3/3) ... [2022-11-23 14:09:40,162 INFO L112 eAbstractionObserver]: Analyzing ICFG rekh_nxt.2.M1-1.c [2022-11-23 14:09:40,181 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:09:40,182 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:09:40,290 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:09:40,299 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=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@21c932c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:09:40,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:09:40,312 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) [2022-11-23 14:09:40,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 883 [2022-11-23 14:09:40,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:40,386 INFO L195 NwaCegarLoop]: 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] [2022-11-23 14:09:40,387 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:40,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:40,393 INFO L85 PathProgramCache]: Analyzing trace with hash 962128900, now seen corresponding path program 1 times [2022-11-23 14:09:40,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:40,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14609374] [2022-11-23 14:09:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:40,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms