./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 5e519f3a 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_2d49944e-ebd7-4c22-a5ca-34be0e63def5/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d49944e-ebd7-4c22-a5ca-34be0e63def5/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d49944e-ebd7-4c22-a5ca-34be0e63def5/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d49944e-ebd7-4c22-a5ca-34be0e63def5/bin/utaipan-7li7fVZpFI/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_2d49944e-ebd7-4c22-a5ca-34be0e63def5/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d49944e-ebd7-4c22-a5ca-34be0e63def5/bin/utaipan-7li7fVZpFI --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-5e519f3 [2022-11-03 03:39:20,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:39:20,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:39:20,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:39:20,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:39:20,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:39:20,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:39:20,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:39:20,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:39:20,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:39:20,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:39:20,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:39:20,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:39:20,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:39:20,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:39:20,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:39:20,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:39:20,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:39:20,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:39:20,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:39:20,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:39:20,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:39:20,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:39:20,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:39:20,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:39:20,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:39:20,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:39:20,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:39:20,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:39:20,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:39:20,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:39:20,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:39:20,627 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:39:20,628 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:39:20,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:39:20,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:39:20,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:39:20,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:39:20,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:39:20,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:39:20,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:39:20,633 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d49944e-ebd7-4c22-a5ca-34be0e63def5/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:39:20,676 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:39:20,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:39:20,677 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:39:20,677 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:39:20,678 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:39:20,678 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:39:20,678 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:39:20,678 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:39:20,678 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:39:20,679 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:39:20,680 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:39:20,680 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:39:20,680 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:39:20,680 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:39:20,681 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:39:20,681 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:39:20,681 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:39:20,681 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:39:20,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:39:20,682 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:39:20,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:39:20,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:39:20,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:39:20,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:39:20,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:39:20,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:39:20,683 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:39:20,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:39:20,684 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:39:20,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:39:20,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:39:20,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:39:20,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:39:20,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:39:20,685 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:39:20,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:39:20,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:39:20,686 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:39:20,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:39:20,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:39:20,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:39:20,687 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_2d49944e-ebd7-4c22-a5ca-34be0e63def5/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d49944e-ebd7-4c22-a5ca-34be0e63def5/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0278abdbbb57b3938e33a237527cf3a8d14feaf8eba047d58da36569d27728f [2022-11-03 03:39:21,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:39:21,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:39:21,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:39:21,039 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:39:21,040 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:39:21,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d49944e-ebd7-4c22-a5ca-34be0e63def5/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-1.c [2022-11-03 03:39:21,129 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d49944e-ebd7-4c22-a5ca-34be0e63def5/bin/utaipan-7li7fVZpFI/data/810a74114/d9f2494fef284807bc4ea3c512c72ed8/FLAG3ba1a7495 [2022-11-03 03:39:21,803 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:39:21,813 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d49944e-ebd7-4c22-a5ca-34be0e63def5/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-1.c [2022-11-03 03:39:21,836 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d49944e-ebd7-4c22-a5ca-34be0e63def5/bin/utaipan-7li7fVZpFI/data/810a74114/d9f2494fef284807bc4ea3c512c72ed8/FLAG3ba1a7495 [2022-11-03 03:39:22,022 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d49944e-ebd7-4c22-a5ca-34be0e63def5/bin/utaipan-7li7fVZpFI/data/810a74114/d9f2494fef284807bc4ea3c512c72ed8 [2022-11-03 03:39:22,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:39:22,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:39:22,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:39:22,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:39:22,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:39:22,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:39:22" (1/1) ... [2022-11-03 03:39:22,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23bfb5d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:22, skipping insertion in model container [2022-11-03 03:39:22,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:39:22" (1/1) ... [2022-11-03 03:39:22,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:39:22,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:39:22,397 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_2d49944e-ebd7-4c22-a5ca-34be0e63def5/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-1.c[1765,1778] [2022-11-03 03:39:22,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:39:22,829 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:39:22,842 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_2d49944e-ebd7-4c22-a5ca-34be0e63def5/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-1.c[1765,1778] [2022-11-03 03:39:23,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:39:23,122 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:39:23,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:23 WrapperNode [2022-11-03 03:39:23,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:39:23,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:39:23,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:39:23,123 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:39:23,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:23" (1/1) ... [2022-11-03 03:39:23,179 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:23" (1/1) ... [2022-11-03 03:39:23,418 INFO L138 Inliner]: procedures = 60, calls = 2524, calls flagged for inlining = 22, calls inlined = 22, statements flattened = 4783 [2022-11-03 03:39:23,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:39:23,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:39:23,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:39:23,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:39:23,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:23" (1/1) ... [2022-11-03 03:39:23,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:23" (1/1) ... [2022-11-03 03:39:23,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:23" (1/1) ... [2022-11-03 03:39:23,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:23" (1/1) ... [2022-11-03 03:39:23,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:23" (1/1) ... [2022-11-03 03:39:23,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:23" (1/1) ... [2022-11-03 03:39:23,628 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:23" (1/1) ... [2022-11-03 03:39:23,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:23" (1/1) ... [2022-11-03 03:39:23,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:39:23,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:39:23,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:39:23,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:39:23,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:23" (1/1) ... [2022-11-03 03:39:23,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:39:23,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d49944e-ebd7-4c22-a5ca-34be0e63def5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:39:23,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d49944e-ebd7-4c22-a5ca-34be0e63def5/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:39:23,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d49944e-ebd7-4c22-a5ca-34be0e63def5/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:39:23,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:39:23,895 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2022-11-03 03:39:23,895 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2022-11-03 03:39:23,895 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2022-11-03 03:39:23,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2022-11-03 03:39:23,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:39:23,896 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2022-11-03 03:39:23,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2022-11-03 03:39:23,896 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2022-11-03 03:39:23,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2022-11-03 03:39:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_observer_obstacle_flag [2022-11-03 03:39:23,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_observer_obstacle_flag [2022-11-03 03:39:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2022-11-03 03:39:23,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2022-11-03 03:39:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:39:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2022-11-03 03:39:23,898 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2022-11-03 03:39:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2022-11-03 03:39:23,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2022-11-03 03:39:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-11-03 03:39:23,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-11-03 03:39:23,899 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-11-03 03:39:23,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-11-03 03:39:23,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:39:23,899 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2022-11-03 03:39:23,900 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2022-11-03 03:39:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:39:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-11-03 03:39:23,900 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-11-03 03:39:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2022-11-03 03:39:23,901 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2022-11-03 03:39:23,901 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_obstacle_flag [2022-11-03 03:39:23,901 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_obstacle_flag [2022-11-03 03:39:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:39:23,902 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:39:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:39:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:39:23,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:39:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2022-11-03 03:39:23,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2022-11-03 03:39:23,903 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2022-11-03 03:39:23,903 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2022-11-03 03:39:23,903 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2022-11-03 03:39:23,904 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2022-11-03 03:39:24,523 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:39:24,525 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:39:33,085 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:39:33,450 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:39:33,451 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:39:33,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:39:33 BoogieIcfgContainer [2022-11-03 03:39:33,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:39:33,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:39:33,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:39:33,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:39:33,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:39:22" (1/3) ... [2022-11-03 03:39:33,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378558e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:39:33, skipping insertion in model container [2022-11-03 03:39:33,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:23" (2/3) ... [2022-11-03 03:39:33,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378558e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:39:33, skipping insertion in model container [2022-11-03 03:39:33,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:39:33" (3/3) ... [2022-11-03 03:39:33,466 INFO L112 eAbstractionObserver]: Analyzing ICFG rekh_nxt.2.M1-1.c [2022-11-03 03:39:33,484 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:39:33,484 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:39:33,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:39:33,589 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;@65dd0021, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:39:33,590 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:39:33,599 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) [2022-11-03 03:39:33,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 883 [2022-11-03 03:39:33,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:33,661 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] [2022-11-03 03:39:33,662 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:33,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:33,668 INFO L85 PathProgramCache]: Analyzing trace with hash 962128900, now seen corresponding path program 1 times [2022-11-03 03:39:33,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:33,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742941575] [2022-11-03 03:39:33,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:33,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms