./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --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 d2d3aad0694c3b388c0809528dd70602c78583397ee307f7b8ddb787c2822233 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:16:35,888 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:16:36,007 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:16:36,016 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:16:36,017 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:16:36,072 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:16:36,077 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:16:36,077 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:16:36,078 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:16:36,079 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:16:36,079 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:16:36,079 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:16:36,080 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:16:36,080 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:16:36,081 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:16:36,081 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:16:36,086 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:16:36,090 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:16:36,091 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:16:36,091 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:16:36,092 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:16:36,097 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:16:36,097 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:16:36,098 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:16:36,098 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:16:36,098 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:16:36,099 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:16:36,099 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:16:36,099 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:16:36,100 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:16:36,100 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:16:36,105 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:16:36,105 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:16:36,105 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:16:36,106 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:16:36,106 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:16:36,106 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:16:36,107 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:16:36,107 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:16:36,110 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:16:36,111 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:16:36,111 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:16:36,112 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:16:36,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:16:36,113 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:16:36,113 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:16:36,114 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:16:36,114 INFO L153 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_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2d3aad0694c3b388c0809528dd70602c78583397ee307f7b8ddb787c2822233 [2024-11-09 05:16:36,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:16:36,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:16:36,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:16:36,532 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:16:36,533 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:16:36,534 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M1-1.c Unable to find full path for "g++" [2024-11-09 05:16:38,814 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:16:39,263 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:16:39,280 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M1-1.c [2024-11-09 05:16:39,302 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/data/31425f648/2644e1b09de84f7b990de3bb78c433f7/FLAG42a441b7b [2024-11-09 05:16:39,321 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/data/31425f648/2644e1b09de84f7b990de3bb78c433f7 [2024-11-09 05:16:39,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:16:39,326 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:16:39,327 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:16:39,327 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:16:39,333 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:16:39,334 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:16:39" (1/1) ... [2024-11-09 05:16:39,335 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ac7c282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:39, skipping insertion in model container [2024-11-09 05:16:39,336 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:16:39" (1/1) ... [2024-11-09 05:16:39,421 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:16:39,669 WARN L250 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_1305f02b-7984-4c89-af13-3a9100a11e82/sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M1-1.c[1510,1523] [2024-11-09 05:16:40,251 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:16:40,284 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:16:40,298 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"/tmp/aaaa/nxt.bug1.i","-S") [38] [2024-11-09 05:16:40,306 WARN L250 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_1305f02b-7984-4c89-af13-3a9100a11e82/sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M1-1.c[1510,1523] [2024-11-09 05:16:40,652 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:16:40,747 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:16:40,747 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:40 WrapperNode [2024-11-09 05:16:40,748 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:16:40,749 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:16:40,749 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:16:40,749 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:16:40,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:40" (1/1) ... [2024-11-09 05:16:40,854 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:40" (1/1) ... [2024-11-09 05:16:41,072 INFO L138 Inliner]: procedures = 55, calls = 2249, calls flagged for inlining = 22, calls inlined = 22, statements flattened = 4884 [2024-11-09 05:16:41,073 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:16:41,074 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:16:41,074 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:16:41,074 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:16:41,087 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:40" (1/1) ... [2024-11-09 05:16:41,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:40" (1/1) ... [2024-11-09 05:16:41,127 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:40" (1/1) ... [2024-11-09 05:16:41,129 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:40" (1/1) ... [2024-11-09 05:16:41,493 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:40" (1/1) ... [2024-11-09 05:16:41,524 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:40" (1/1) ... [2024-11-09 05:16:41,556 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:40" (1/1) ... [2024-11-09 05:16:41,570 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:40" (1/1) ... [2024-11-09 05:16:41,611 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:16:41,613 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:16:41,613 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:16:41,614 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:16:41,615 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:40" (1/1) ... [2024-11-09 05:16:41,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:16:41,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:16:41,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:16:41,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:16:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:16:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2024-11-09 05:16:41,712 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2024-11-09 05:16:41,712 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2024-11-09 05:16:41,712 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2024-11-09 05:16:41,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:16:41,713 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2024-11-09 05:16:41,713 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2024-11-09 05:16:41,713 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2024-11-09 05:16:41,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2024-11-09 05:16:41,714 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2024-11-09 05:16:41,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2024-11-09 05:16:41,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:16:41,714 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2024-11-09 05:16:41,715 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2024-11-09 05:16:41,715 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2024-11-09 05:16:41,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2024-11-09 05:16:41,716 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2024-11-09 05:16:41,716 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2024-11-09 05:16:41,716 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2024-11-09 05:16:41,716 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2024-11-09 05:16:41,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:16:41,717 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2024-11-09 05:16:41,717 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2024-11-09 05:16:41,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:16:41,718 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2024-11-09 05:16:41,719 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2024-11-09 05:16:41,719 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 05:16:41,719 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 05:16:41,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:16:41,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:16:41,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:16:41,721 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2024-11-09 05:16:41,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2024-11-09 05:16:41,721 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2024-11-09 05:16:41,721 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2024-11-09 05:16:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2024-11-09 05:16:41,722 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2024-11-09 05:16:42,291 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:16:42,294 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:16:52,275 INFO L? ?]: Removed 350 outVars from TransFormulas that were not future-live. [2024-11-09 05:16:52,276 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:16:52,704 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:16:52,704 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:16:52,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:16:52 BoogieIcfgContainer [2024-11-09 05:16:52,705 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:16:52,709 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:16:52,709 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:16:52,715 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:16:52,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:16:39" (1/3) ... [2024-11-09 05:16:52,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692ea6ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:16:52, skipping insertion in model container [2024-11-09 05:16:52,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:40" (2/3) ... [2024-11-09 05:16:52,717 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692ea6ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:16:52, skipping insertion in model container [2024-11-09 05:16:52,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:16:52" (3/3) ... [2024-11-09 05:16:52,719 INFO L112 eAbstractionObserver]: Analyzing ICFG rekh_nxt.1.M1-1.c [2024-11-09 05:16:52,746 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:16:52,746 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:16:52,913 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:16:52,923 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@1690d819, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:16:52,923 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:16:52,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 1437 states, 809 states have (on average 1.2719406674907292) internal successors, (1029), 938 states have internal predecessors, (1029), 611 states have call successors, (611), 15 states have call predecessors, (611), 15 states have return successors, (611), 512 states have call predecessors, (611), 611 states have call successors, (611) [2024-11-09 05:16:53,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1548 [2024-11-09 05:16:53,159 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:53,161 INFO L215 NwaCegarLoop]: trace histogram [241, 27, 27, 27, 27, 27, 24, 24, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:16:53,162 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:53,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:53,168 INFO L85 PathProgramCache]: Analyzing trace with hash 440236420, now seen corresponding path program 1 times [2024-11-09 05:16:53,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:53,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234044745] [2024-11-09 05:16:53,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:53,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:18:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:18:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 62443 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 62374 trivial. 0 not checked. [2024-11-09 05:18:47,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:18:47,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234044745] [2024-11-09 05:18:47,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234044745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:18:47,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093505901] [2024-11-09 05:18:47,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:18:47,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:18:47,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:18:47,452 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:18:47,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:20:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:20:08,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 6899 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:20:08,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:20:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 62443 backedges. 14045 proven. 0 refuted. 0 times theorem prover too weak. 48398 trivial. 0 not checked. [2024-11-09 05:20:08,805 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:20:08,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093505901] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:20:08,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:20:08,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2024-11-09 05:20:08,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48092244] [2024-11-09 05:20:08,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:20:08,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:20:08,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:20:08,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:20:08,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:20:08,870 INFO L87 Difference]: Start difference. First operand has 1437 states, 809 states have (on average 1.2719406674907292) internal successors, (1029), 938 states have internal predecessors, (1029), 611 states have call successors, (611), 15 states have call predecessors, (611), 15 states have return successors, (611), 512 states have call predecessors, (611), 611 states have call successors, (611) Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 2 states have call successors, (273), 2 states have call predecessors, (273), 2 states have return successors, (273), 2 states have call predecessors, (273), 2 states have call successors, (273) [2024-11-09 05:20:11,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-09 05:20:13,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-09 05:20:13,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:20:13,834 INFO L93 Difference]: Finished difference Result 2404 states and 3819 transitions. [2024-11-09 05:20:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:20:13,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 2 states have call successors, (273), 2 states have call predecessors, (273), 2 states have return successors, (273), 2 states have call predecessors, (273), 2 states have call successors, (273) Word has length 1547 [2024-11-09 05:20:13,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:20:13,879 INFO L225 Difference]: With dead ends: 2404 [2024-11-09 05:20:13,879 INFO L226 Difference]: Without dead ends: 1435 [2024-11-09 05:20:13,903 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1549 GetRequests, 1548 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:20:13,911 INFO L432 NwaCegarLoop]: 2224 mSDtfsCounter, 0 mSDsluCounter, 2217 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4441 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:20:13,913 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4441 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2024-11-09 05:20:13,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2024-11-09 05:20:14,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1435. [2024-11-09 05:20:14,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 808 states have (on average 1.2685643564356435) internal successors, (1025), 936 states have internal predecessors, (1025), 611 states have call successors, (611), 15 states have call predecessors, (611), 15 states have return successors, (611), 512 states have call predecessors, (611), 611 states have call successors, (611) [2024-11-09 05:20:14,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 2247 transitions. [2024-11-09 05:20:14,400 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 2247 transitions. Word has length 1547 [2024-11-09 05:20:14,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:20:14,407 INFO L471 AbstractCegarLoop]: Abstraction has 1435 states and 2247 transitions. [2024-11-09 05:20:14,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 2 states have call successors, (273), 2 states have call predecessors, (273), 2 states have return successors, (273), 2 states have call predecessors, (273), 2 states have call successors, (273) [2024-11-09 05:20:14,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 2247 transitions. [2024-11-09 05:20:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1692 [2024-11-09 05:20:14,490 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:20:14,492 INFO L215 NwaCegarLoop]: trace histogram [241, 48, 27, 27, 27, 27, 27, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:20:14,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 05:20:14,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-09 05:20:14,693 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:20:14,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:20:14,695 INFO L85 PathProgramCache]: Analyzing trace with hash -611270204, now seen corresponding path program 1 times [2024-11-09 05:20:14,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:20:14,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238968236] [2024-11-09 05:20:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:20:14,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:21:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:25:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 65251 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 64966 trivial. 0 not checked. [2024-11-09 05:25:39,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:25:39,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238968236] [2024-11-09 05:25:39,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238968236] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:25:39,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95183126] [2024-11-09 05:25:39,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:25:39,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:25:39,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:25:39,933 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:25:39,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1305f02b-7984-4c89-af13-3a9100a11e82/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:27:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:01,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 7379 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 05:27:01,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 65251 backedges. 13098 proven. 2 refuted. 0 times theorem prover too weak. 52151 trivial. 0 not checked. [2024-11-09 05:27:01,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:27:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 65251 backedges. 10 proven. 120 refuted. 0 times theorem prover too weak. 65121 trivial. 0 not checked. [2024-11-09 05:27:06,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95183126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:27:06,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1335096269] [2024-11-09 05:27:06,905 INFO L159 IcfgInterpreter]: Started Sifa with 696 locations of interest [2024-11-09 05:27:06,906 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:27:06,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:27:06,920 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:27:06,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs