./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 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/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_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh --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 0.2.4-dev-0e0057c [2023-12-02 13:45:00,757 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:45:00,826 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 13:45:00,830 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:45:00,831 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:45:00,855 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:45:00,856 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:45:00,856 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:45:00,857 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:45:00,858 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:45:00,858 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:45:00,859 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:45:00,859 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:45:00,860 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:45:00,860 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:45:00,861 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:45:00,861 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:45:00,862 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:45:00,862 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:45:00,863 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:45:00,863 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:45:00,864 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:45:00,865 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:45:00,865 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:45:00,866 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:45:00,866 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:45:00,867 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:45:00,867 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:45:00,868 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:45:00,868 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:45:00,869 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:45:00,869 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:45:00,870 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:45:00,870 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:45:00,870 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:45:00,870 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:45:00,871 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:45:00,871 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:45:00,871 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:45:00,871 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:45:00,872 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:45:00,872 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:45:00,872 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:45:00,872 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:45:00,873 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:45:00,873 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:45:00,873 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:45:00,873 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_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2d3aad0694c3b388c0809528dd70602c78583397ee307f7b8ddb787c2822233 [2023-12-02 13:45:01,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:45:01,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:45:01,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:45:01,134 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:45:01,134 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:45:01,136 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M1-1.c [2023-12-02 13:45:03,826 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:45:04,115 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:45:04,116 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M1-1.c [2023-12-02 13:45:04,137 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/data/4562cb977/1c1d70dde3104838b083077c293e925f/FLAGb9fa441a8 [2023-12-02 13:45:04,150 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/data/4562cb977/1c1d70dde3104838b083077c293e925f [2023-12-02 13:45:04,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:45:04,154 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:45:04,156 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:45:04,156 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:45:04,161 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:45:04,161 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:45:04" (1/1) ... [2023-12-02 13:45:04,162 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c7cbc5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:04, skipping insertion in model container [2023-12-02 13:45:04,162 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:45:04" (1/1) ... [2023-12-02 13:45:04,226 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:45:04,414 WARN L240 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_b105cbf5-d0f1-4862-8b4a-aca32deede3d/sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M1-1.c[1510,1523] [2023-12-02 13:45:04,697 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:45:04,712 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:45:04,722 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"/tmp/aaaa/nxt.bug1.i","-S") [38] [2023-12-02 13:45:04,727 WARN L240 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_b105cbf5-d0f1-4862-8b4a-aca32deede3d/sv-benchmarks/c/seq-mthreaded/rekh_nxt.1.M1-1.c[1510,1523] [2023-12-02 13:45:04,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:45:04,913 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:45:04,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:04 WrapperNode [2023-12-02 13:45:04,913 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:45:04,914 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:45:04,914 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:45:04,914 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:45:04,920 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:04" (1/1) ... [2023-12-02 13:45:04,978 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:04" (1/1) ... [2023-12-02 13:45:05,220 INFO L138 Inliner]: procedures = 55, calls = 2033, calls flagged for inlining = 22, calls inlined = 22, statements flattened = 4113 [2023-12-02 13:45:05,221 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:45:05,221 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:45:05,221 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:45:05,222 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:45:05,231 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:04" (1/1) ... [2023-12-02 13:45:05,232 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:04" (1/1) ... [2023-12-02 13:45:05,266 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:04" (1/1) ... [2023-12-02 13:45:05,267 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:04" (1/1) ... [2023-12-02 13:45:05,351 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:04" (1/1) ... [2023-12-02 13:45:05,364 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:04" (1/1) ... [2023-12-02 13:45:05,377 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:04" (1/1) ... [2023-12-02 13:45:05,389 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:04" (1/1) ... [2023-12-02 13:45:05,412 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:45:05,413 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:45:05,413 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:45:05,413 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:45:05,413 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:04" (1/1) ... [2023-12-02 13:45:05,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:45:05,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:45:05,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:45:05,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:45:05,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:45:05,479 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2023-12-02 13:45:05,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2023-12-02 13:45:05,479 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2023-12-02 13:45:05,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2023-12-02 13:45:05,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 13:45:05,480 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2023-12-02 13:45:05,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2023-12-02 13:45:05,480 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2023-12-02 13:45:05,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2023-12-02 13:45:05,524 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2023-12-02 13:45:05,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2023-12-02 13:45:05,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 13:45:05,525 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2023-12-02 13:45:05,525 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2023-12-02 13:45:05,525 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2023-12-02 13:45:05,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2023-12-02 13:45:05,526 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2023-12-02 13:45:05,526 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2023-12-02 13:45:05,526 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2023-12-02 13:45:05,526 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2023-12-02 13:45:05,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 13:45:05,526 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2023-12-02 13:45:05,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2023-12-02 13:45:05,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 13:45:05,527 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2023-12-02 13:45:05,527 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2023-12-02 13:45:05,527 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 13:45:05,527 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 13:45:05,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:45:05,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:45:05,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:45:05,528 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2023-12-02 13:45:05,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2023-12-02 13:45:05,528 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2023-12-02 13:45:05,528 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2023-12-02 13:45:05,528 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2023-12-02 13:45:05,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2023-12-02 13:45:05,861 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:45:05,864 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:45:13,318 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:45:13,565 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:45:13,565 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 13:45:13,567 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:45:13 BoogieIcfgContainer [2023-12-02 13:45:13,567 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:45:13,569 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:45:13,569 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:45:13,572 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:45:13,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:45:04" (1/3) ... [2023-12-02 13:45:13,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5001830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:45:13, skipping insertion in model container [2023-12-02 13:45:13,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:04" (2/3) ... [2023-12-02 13:45:13,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5001830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:45:13, skipping insertion in model container [2023-12-02 13:45:13,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:45:13" (3/3) ... [2023-12-02 13:45:13,574 INFO L112 eAbstractionObserver]: Analyzing ICFG rekh_nxt.1.M1-1.c [2023-12-02 13:45:13,589 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:45:13,589 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 13:45:13,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:45:13,673 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=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;@9b8cc41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:45:13,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 13:45:13,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 1559 states, 931 states have (on average 1.2352309344790549) internal successors, (1150), 936 states have internal predecessors, (1150), 611 states have call successors, (611), 15 states have call predecessors, (611), 15 states have return successors, (611), 609 states have call predecessors, (611), 611 states have call successors, (611) [2023-12-02 13:45:13,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1563 [2023-12-02 13:45:13,796 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:45:13,797 INFO L195 NwaCegarLoop]: trace histogram [241, 27, 27, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2023-12-02 13:45:13,798 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:45:13,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:45:13,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1191867443, now seen corresponding path program 1 times [2023-12-02 13:45:13,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:45:13,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709373557] [2023-12-02 13:45:13,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:45:13,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:46:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:47:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 62311 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 62242 trivial. 0 not checked. [2023-12-02 13:47:15,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:47:15,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709373557] [2023-12-02 13:47:15,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709373557] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:47:15,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556289673] [2023-12-02 13:47:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:47:15,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:47:15,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:47:15,221 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:47:15,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:48:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:48:33,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 7086 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:48:33,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:48:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 62311 backedges. 14039 proven. 0 refuted. 0 times theorem prover too weak. 48272 trivial. 0 not checked. [2023-12-02 13:48:33,365 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:48:33,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556289673] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:48:33,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:48:33,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2023-12-02 13:48:33,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136813075] [2023-12-02 13:48:33,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:48:33,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:48:33,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:48:33,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:48:33,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:48:33,407 INFO L87 Difference]: Start difference. First operand has 1559 states, 931 states have (on average 1.2352309344790549) internal successors, (1150), 936 states have internal predecessors, (1150), 611 states have call successors, (611), 15 states have call predecessors, (611), 15 states have return successors, (611), 609 states have call predecessors, (611), 611 states have call successors, (611) Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 2 states have call successors, (274), 2 states have call predecessors, (274), 2 states have return successors, (274), 2 states have call predecessors, (274), 2 states have call successors, (274) [2023-12-02 13:48:35,973 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 [] [2023-12-02 13:48:37,979 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 [] [2023-12-02 13:48:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:48:38,167 INFO L93 Difference]: Finished difference Result 2648 states and 4061 transitions. [2023-12-02 13:48:38,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:48:38,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 2 states have call successors, (274), 2 states have call predecessors, (274), 2 states have return successors, (274), 2 states have call predecessors, (274), 2 states have call successors, (274) Word has length 1562 [2023-12-02 13:48:38,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:48:38,204 INFO L225 Difference]: With dead ends: 2648 [2023-12-02 13:48:38,204 INFO L226 Difference]: Without dead ends: 1557 [2023-12-02 13:48:38,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1564 GetRequests, 1563 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:48:38,220 INFO L413 NwaCegarLoop]: 2345 mSDtfsCounter, 25 mSDsluCounter, 2300 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 4645 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:48:38,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 4645 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2023-12-02 13:48:38,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2023-12-02 13:48:38,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1557. [2023-12-02 13:48:38,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 930 states have (on average 1.232258064516129) internal successors, (1146), 934 states have internal predecessors, (1146), 611 states have call successors, (611), 15 states have call predecessors, (611), 15 states have return successors, (611), 609 states have call predecessors, (611), 611 states have call successors, (611) [2023-12-02 13:48:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 2368 transitions. [2023-12-02 13:48:38,566 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 2368 transitions. Word has length 1562 [2023-12-02 13:48:38,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:48:38,572 INFO L495 AbstractCegarLoop]: Abstraction has 1557 states and 2368 transitions. [2023-12-02 13:48:38,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 2 states have call successors, (274), 2 states have call predecessors, (274), 2 states have return successors, (274), 2 states have call predecessors, (274), 2 states have call successors, (274) [2023-12-02 13:48:38,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 2368 transitions. [2023-12-02 13:48:38,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1707 [2023-12-02 13:48:38,667 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:48:38,668 INFO L195 NwaCegarLoop]: trace histogram [241, 48, 27, 27, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2023-12-02 13:48:38,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:48:38,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 13:48:38,870 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:48:38,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:48:38,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1613317043, now seen corresponding path program 1 times [2023-12-02 13:48:38,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:48:38,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032448316] [2023-12-02 13:48:38,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:48:38,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:50:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:51:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 65119 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 65027 trivial. 0 not checked. [2023-12-02 13:51:27,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:51:27,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032448316] [2023-12-02 13:51:27,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032448316] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:51:27,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513515291] [2023-12-02 13:51:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:51:27,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:51:27,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:51:27,172 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:51:27,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:52:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:52:57,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 7806 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 13:52:57,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:52:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 65119 backedges. 14022 proven. 0 refuted. 0 times theorem prover too weak. 51097 trivial. 0 not checked. [2023-12-02 13:52:58,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:52:58,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513515291] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:52:58,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:52:58,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2023-12-02 13:52:58,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179855737] [2023-12-02 13:52:58,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:52:58,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:52:58,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:52:58,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:52:58,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:52:58,091 INFO L87 Difference]: Start difference. First operand 1557 states and 2368 transitions. Second operand has 5 states, 5 states have (on average 88.8) internal successors, (444), 5 states have internal predecessors, (444), 3 states have call successors, (280), 3 states have call predecessors, (280), 3 states have return successors, (280), 3 states have call predecessors, (280), 3 states have call successors, (280) [2023-12-02 13:53:01,062 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 [] [2023-12-02 13:53:03,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 13:53:05,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 13:53:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:53:08,341 INFO L93 Difference]: Finished difference Result 2878 states and 4405 transitions. [2023-12-02 13:53:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:53:08,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 88.8) internal successors, (444), 5 states have internal predecessors, (444), 3 states have call successors, (280), 3 states have call predecessors, (280), 3 states have return successors, (280), 3 states have call predecessors, (280), 3 states have call successors, (280) Word has length 1706 [2023-12-02 13:53:08,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:53:08,357 INFO L225 Difference]: With dead ends: 2878 [2023-12-02 13:53:08,357 INFO L226 Difference]: Without dead ends: 1791 [2023-12-02 13:53:08,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1712 GetRequests, 1704 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:53:08,365 INFO L413 NwaCegarLoop]: 2330 mSDtfsCounter, 1405 mSDsluCounter, 3614 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1405 SdHoareTripleChecker+Valid, 5944 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:53:08,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1405 Valid, 5944 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1489 Invalid, 3 Unknown, 0 Unchecked, 10.0s Time] [2023-12-02 13:53:08,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2023-12-02 13:53:08,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1789. [2023-12-02 13:53:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1102 states have (on average 1.250453720508167) internal successors, (1378), 1106 states have internal predecessors, (1378), 666 states have call successors, (666), 20 states have call predecessors, (666), 20 states have return successors, (666), 664 states have call predecessors, (666), 666 states have call successors, (666) [2023-12-02 13:53:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 2710 transitions. [2023-12-02 13:53:08,696 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 2710 transitions. Word has length 1706 [2023-12-02 13:53:08,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:53:08,699 INFO L495 AbstractCegarLoop]: Abstraction has 1789 states and 2710 transitions. [2023-12-02 13:53:08,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.8) internal successors, (444), 5 states have internal predecessors, (444), 3 states have call successors, (280), 3 states have call predecessors, (280), 3 states have return successors, (280), 3 states have call predecessors, (280), 3 states have call successors, (280) [2023-12-02 13:53:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 2710 transitions. [2023-12-02 13:53:08,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1695 [2023-12-02 13:53:08,727 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:53:08,728 INFO L195 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, 1, 1, 1] [2023-12-02 13:53:08,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:53:08,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:53:08,929 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:53:08,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:53:08,930 INFO L85 PathProgramCache]: Analyzing trace with hash 335671199, now seen corresponding path program 1 times [2023-12-02 13:53:08,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:53:08,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351680523] [2023-12-02 13:53:08,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:53:08,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:54:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:57:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 65251 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 64966 trivial. 0 not checked. [2023-12-02 13:57:39,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:57:39,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351680523] [2023-12-02 13:57:39,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351680523] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:57:39,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164253191] [2023-12-02 13:57:39,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:57:39,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:57:39,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:57:39,596 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:57:39,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b105cbf5-d0f1-4862-8b4a-aca32deede3d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:59:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:59:05,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 7770 conjuncts, 69 conjunts are in the unsatisfiable core [2023-12-02 13:59:05,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:59:20,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:59:20,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:59:20,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:59:20,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:59:20,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:59:20,569 INFO L190 IndexEqualityManager]: detected not equals via solver