./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/rekh_aso.2.M4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_78351f50-f91f-419b-b3d4-9c8612e32559/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78351f50-f91f-419b-b3d4-9c8612e32559/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_78351f50-f91f-419b-b3d4-9c8612e32559/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78351f50-f91f-419b-b3d4-9c8612e32559/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/rekh_aso.2.M4-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78351f50-f91f-419b-b3d4-9c8612e32559/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_78351f50-f91f-419b-b3d4-9c8612e32559/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 d66bda3f947b403f01c3d2c281ac384b241cf0bf9299658426cacf75877297a8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:21:32,099 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:21:32,181 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78351f50-f91f-419b-b3d4-9c8612e32559/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 18:21:32,186 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:21:32,187 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:21:32,216 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:21:32,217 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:21:32,218 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:21:32,219 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:21:32,219 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:21:32,220 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:21:32,221 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:21:32,221 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:21:32,222 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:21:32,222 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:21:32,223 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:21:32,224 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:21:32,224 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:21:32,225 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:21:32,226 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:21:32,226 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:21:32,227 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:21:32,228 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:21:32,228 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:21:32,229 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:21:32,229 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:21:32,230 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:21:32,230 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:21:32,231 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:21:32,231 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:21:32,231 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:21:32,232 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:21:32,232 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:21:32,232 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:21:32,233 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:21:32,233 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:21:32,233 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:21:32,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:21:32,234 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:21:32,234 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:21:32,234 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:21:32,235 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:21:32,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:21:32,235 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:21:32,235 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:21:32,235 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:21:32,236 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:21:32,236 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_78351f50-f91f-419b-b3d4-9c8612e32559/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78351f50-f91f-419b-b3d4-9c8612e32559/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d66bda3f947b403f01c3d2c281ac384b241cf0bf9299658426cacf75877297a8 [2023-12-02 18:21:32,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:21:32,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:21:32,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:21:32,549 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:21:32,550 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:21:32,551 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78351f50-f91f-419b-b3d4-9c8612e32559/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded/rekh_aso.2.M4-1.c [2023-12-02 18:21:35,840 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:21:36,214 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:21:36,215 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78351f50-f91f-419b-b3d4-9c8612e32559/sv-benchmarks/c/seq-mthreaded/rekh_aso.2.M4-1.c [2023-12-02 18:21:36,239 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78351f50-f91f-419b-b3d4-9c8612e32559/bin/utaipan-verify-nQ1chXbOIh/data/d3d9df593/e217932837d54aadbda0495bd7d5557f/FLAGbb9f02ae3 [2023-12-02 18:21:36,257 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78351f50-f91f-419b-b3d4-9c8612e32559/bin/utaipan-verify-nQ1chXbOIh/data/d3d9df593/e217932837d54aadbda0495bd7d5557f [2023-12-02 18:21:36,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:21:36,262 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:21:36,264 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:21:36,264 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:21:36,271 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:21:36,272 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:21:36" (1/1) ... [2023-12-02 18:21:36,274 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@436d9662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:21:36, skipping insertion in model container [2023-12-02 18:21:36,274 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:21:36" (1/1) ... [2023-12-02 18:21:36,397 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:21:36,630 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_78351f50-f91f-419b-b3d4-9c8612e32559/sv-benchmarks/c/seq-mthreaded/rekh_aso.2.M4-1.c[1974,1987] [2023-12-02 18:21:37,060 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:21:37,079 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:21:37,089 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"/tmp/aaaa/aso.bug2.i","-S") [47] [2023-12-02 18:21:37,096 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_78351f50-f91f-419b-b3d4-9c8612e32559/sv-benchmarks/c/seq-mthreaded/rekh_aso.2.M4-1.c[1974,1987] [2023-12-02 18:21:37,320 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:21:37,346 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:21:37,347 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:21:37 WrapperNode [2023-12-02 18:21:37,347 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:21:37,348 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:21:37,348 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:21:37,348 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:21:37,355 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:21:37" (1/1) ... [2023-12-02 18:21:37,421 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:21:37" (1/1) ... [2023-12-02 18:21:37,684 INFO L138 Inliner]: procedures = 61, calls = 3183, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 6271 [2023-12-02 18:21:37,684 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:21:37,685 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:21:37,685 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:21:37,685 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:21:37,694 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:21:37" (1/1) ... [2023-12-02 18:21:37,694 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:21:37" (1/1) ... [2023-12-02 18:21:37,739 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:21:37" (1/1) ... [2023-12-02 18:21:37,739 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:21:37" (1/1) ... [2023-12-02 18:21:37,871 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:21:37" (1/1) ... [2023-12-02 18:21:37,894 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:21:37" (1/1) ... [2023-12-02 18:21:37,909 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:21:37" (1/1) ... [2023-12-02 18:21:37,979 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:21:37" (1/1) ... [2023-12-02 18:21:38,021 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:21:38,022 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:21:38,022 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:21:38,022 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:21:38,023 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:21:37" (1/1) ... [2023-12-02 18:21:38,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:21:38,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78351f50-f91f-419b-b3d4-9c8612e32559/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:21:38,056 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78351f50-f91f-419b-b3d4-9c8612e32559/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:21:38,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78351f50-f91f-419b-b3d4-9c8612e32559/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:21:38,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:21:38,099 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_cmd_forward [2023-12-02 18:21:38,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_cmd_forward [2023-12-02 18:21:38,099 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2023-12-02 18:21:38,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2023-12-02 18:21:38,099 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2023-12-02 18:21:38,100 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2023-12-02 18:21:38,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 18:21:38,100 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2023-12-02 18:21:38,100 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2023-12-02 18:21:38,100 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2023-12-02 18:21:38,100 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2023-12-02 18:21:38,100 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2023-12-02 18:21:38,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2023-12-02 18:21:38,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 18:21:38,101 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2023-12-02 18:21:38,101 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2023-12-02 18:21:38,101 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2023-12-02 18:21:38,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2023-12-02 18:21:38,101 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_cmd_turn [2023-12-02 18:21:38,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_cmd_turn [2023-12-02 18:21:38,102 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2023-12-02 18:21:38,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2023-12-02 18:21:38,102 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2023-12-02 18:21:38,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2023-12-02 18:21:38,102 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts3 [2023-12-02 18:21:38,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts3 [2023-12-02 18:21:38,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 18:21:38,103 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_hyperperiod [2023-12-02 18:21:38,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_hyperperiod [2023-12-02 18:21:38,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 18:21:38,103 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-12-02 18:21:38,103 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-12-02 18:21:38,103 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2023-12-02 18:21:38,103 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2023-12-02 18:21:38,104 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_cmd_forward [2023-12-02 18:21:38,104 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_cmd_forward [2023-12-02 18:21:38,104 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_obstacle_flag [2023-12-02 18:21:38,104 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_obstacle_flag [2023-12-02 18:21:38,104 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 18:21:38,104 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 18:21:38,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:21:38,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:21:38,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:21:38,105 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2023-12-02 18:21:38,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2023-12-02 18:21:38,105 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2023-12-02 18:21:38,105 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2023-12-02 18:21:38,105 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2023-12-02 18:21:38,105 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2023-12-02 18:21:38,105 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_cmd_turn [2023-12-02 18:21:38,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_cmd_turn [2023-12-02 18:21:38,634 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:21:38,637 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:21:50,826 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:21:51,303 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:21:51,303 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 18:21:51,306 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:21:51 BoogieIcfgContainer [2023-12-02 18:21:51,306 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:21:51,309 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:21:51,309 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:21:51,313 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:21:51,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:21:36" (1/3) ... [2023-12-02 18:21:51,314 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@553da71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:21:51, skipping insertion in model container [2023-12-02 18:21:51,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:21:37" (2/3) ... [2023-12-02 18:21:51,315 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@553da71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:21:51, skipping insertion in model container [2023-12-02 18:21:51,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:21:51" (3/3) ... [2023-12-02 18:21:51,317 INFO L112 eAbstractionObserver]: Analyzing ICFG rekh_aso.2.M4-1.c [2023-12-02 18:21:51,339 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:21:51,339 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:21:51,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:21:51,475 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;@23e0490c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:21:51,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:21:51,493 INFO L276 IsEmpty]: Start isEmpty. Operand has 2325 states, 1333 states have (on average 1.1987996999249813) internal successors, (1598), 1337 states have internal predecessors, (1598), 968 states have call successors, (968), 22 states have call predecessors, (968), 22 states have return successors, (968), 966 states have call predecessors, (968), 968 states have call successors, (968) [2023-12-02 18:21:51,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 913 [2023-12-02 18:21:51,579 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:21:51,581 INFO L195 NwaCegarLoop]: trace histogram [209, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:51,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:21:51,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:21:51,589 INFO L85 PathProgramCache]: Analyzing trace with hash -141492525, now seen corresponding path program 1 times [2023-12-02 18:21:51,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:21:51,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699714987] [2023-12-02 18:21:51,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:21:51,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:23:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:24:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 43472 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43472 trivial. 0 not checked. [2023-12-02 18:24:23,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:24:23,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699714987] [2023-12-02 18:24:23,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699714987] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:24:23,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:24:23,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:24:23,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219783549] [2023-12-02 18:24:23,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:24:23,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:24:23,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:24:23,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:24:23,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:24:23,934 INFO L87 Difference]: Start difference. First operand has 2325 states, 1333 states have (on average 1.1987996999249813) internal successors, (1598), 1337 states have internal predecessors, (1598), 968 states have call successors, (968), 22 states have call predecessors, (968), 22 states have return successors, (968), 966 states have call predecessors, (968), 968 states have call successors, (968) Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 2 states have call successors, (213), 2 states have call predecessors, (213), 2 states have return successors, (211), 2 states have call predecessors, (211), 2 states have call successors, (211) [2023-12-02 18:24:26,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:24:28,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:24:28,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:24:28,663 INFO L93 Difference]: Finished difference Result 4648 states and 7147 transitions. [2023-12-02 18:24:28,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:24:28,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 2 states have call successors, (213), 2 states have call predecessors, (213), 2 states have return successors, (211), 2 states have call predecessors, (211), 2 states have call successors, (211) Word has length 912 [2023-12-02 18:24:28,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:24:28,717 INFO L225 Difference]: With dead ends: 4648 [2023-12-02 18:24:28,717 INFO L226 Difference]: Without dead ends: 2323 [2023-12-02 18:24:28,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 18:24:28,758 INFO L413 NwaCegarLoop]: 3498 mSDtfsCounter, 22 mSDsluCounter, 3456 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 6954 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:24:28,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 6954 Invalid, 68 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2023-12-02 18:24:28,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2023-12-02 18:24:29,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2323. [2023-12-02 18:24:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 1332 states have (on average 1.1974474474474475) internal successors, (1595), 1336 states have internal predecessors, (1595), 968 states have call successors, (968), 22 states have call predecessors, (968), 22 states have return successors, (967), 965 states have call predecessors, (967), 967 states have call successors, (967) [2023-12-02 18:24:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 3530 transitions. [2023-12-02 18:24:29,912 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 3530 transitions. Word has length 912 [2023-12-02 18:24:29,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:24:29,918 INFO L495 AbstractCegarLoop]: Abstraction has 2323 states and 3530 transitions. [2023-12-02 18:24:29,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 2 states have call successors, (213), 2 states have call predecessors, (213), 2 states have return successors, (211), 2 states have call predecessors, (211), 2 states have call successors, (211) [2023-12-02 18:24:29,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 3530 transitions. [2023-12-02 18:24:29,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 919 [2023-12-02 18:24:29,958 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:24:29,958 INFO L195 NwaCegarLoop]: trace histogram [209, 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] [2023-12-02 18:24:29,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:24:29,959 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:24:29,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:24:29,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1532409293, now seen corresponding path program 1 times [2023-12-02 18:24:29,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:24:29,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985987190] [2023-12-02 18:24:29,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:24:29,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:26:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 43474 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43474 trivial. 0 not checked. [2023-12-02 18:28:47,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:28:47,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985987190] [2023-12-02 18:28:47,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985987190] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:28:47,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:28:47,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:28:47,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467229501] [2023-12-02 18:28:47,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:28:47,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:28:47,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:28:47,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:28:47,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:28:47,746 INFO L87 Difference]: Start difference. First operand 2323 states and 3530 transitions. Second operand has 5 states, 4 states have (on average 70.25) internal successors, (281), 5 states have internal predecessors, (281), 4 states have call successors, (215), 2 states have call predecessors, (215), 2 states have return successors, (213), 3 states have call predecessors, (213), 4 states have call successors, (213) [2023-12-02 18:28:52,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:28:54,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:28:56,196 WARN L539 Checker$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 18:29:07,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:29:09,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:29:11,177 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 18:29:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:29:11,224 INFO L93 Difference]: Finished difference Result 5489 states and 8350 transitions. [2023-12-02 18:29:11,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:29:11,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 70.25) internal successors, (281), 5 states have internal predecessors, (281), 4 states have call successors, (215), 2 states have call predecessors, (215), 2 states have return successors, (213), 3 states have call predecessors, (213), 4 states have call successors, (213) Word has length 918 [2023-12-02 18:29:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:29:11,266 INFO L225 Difference]: With dead ends: 5489 [2023-12-02 18:29:11,266 INFO L226 Difference]: Without dead ends: 3168 [2023-12-02 18:29:11,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:29:11,319 INFO L413 NwaCegarLoop]: 4715 mSDtfsCounter, 5779 mSDsluCounter, 2125 mSDsCounter, 0 mSdLazyCounter, 2744 mSolverCounterSat, 1159 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5779 SdHoareTripleChecker+Valid, 6840 SdHoareTripleChecker+Invalid, 3909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1159 IncrementalHoareTripleChecker+Valid, 2744 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:29:11,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5779 Valid, 6840 Invalid, 3909 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1159 Valid, 2744 Invalid, 6 Unknown, 0 Unchecked, 22.8s Time] [2023-12-02 18:29:11,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2023-12-02 18:29:12,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 3165. [2023-12-02 18:29:12,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3165 states, 1849 states have (on average 1.2033531638723634) internal successors, (2225), 1853 states have internal predecessors, (2225), 1284 states have call successors, (1284), 32 states have call predecessors, (1284), 31 states have return successors, (1283), 1280 states have call predecessors, (1283), 1283 states have call successors, (1283) [2023-12-02 18:29:12,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3165 states to 3165 states and 4792 transitions. [2023-12-02 18:29:12,143 INFO L78 Accepts]: Start accepts. Automaton has 3165 states and 4792 transitions. Word has length 918 [2023-12-02 18:29:12,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:29:12,146 INFO L495 AbstractCegarLoop]: Abstraction has 3165 states and 4792 transitions. [2023-12-02 18:29:12,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 70.25) internal successors, (281), 5 states have internal predecessors, (281), 4 states have call successors, (215), 2 states have call predecessors, (215), 2 states have return successors, (213), 3 states have call predecessors, (213), 4 states have call successors, (213) [2023-12-02 18:29:12,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3165 states and 4792 transitions. [2023-12-02 18:29:12,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 923 [2023-12-02 18:29:12,158 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:29:12,159 INFO L195 NwaCegarLoop]: trace histogram [209, 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] [2023-12-02 18:29:12,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:29:12,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:29:12,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:29:12,161 INFO L85 PathProgramCache]: Analyzing trace with hash 87915570, now seen corresponding path program 1 times [2023-12-02 18:29:12,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:29:12,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105610878] [2023-12-02 18:29:12,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:29:12,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:30:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 43474 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43474 trivial. 0 not checked. [2023-12-02 18:32:19,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:19,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105610878] [2023-12-02 18:32:19,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105610878] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:32:19,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:32:19,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:32:19,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270927200] [2023-12-02 18:32:19,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:32:19,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:32:19,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:19,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:32:19,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:32:19,707 INFO L87 Difference]: Start difference. First operand 3165 states and 4792 transitions. Second operand has 6 states, 6 states have (on average 47.166666666666664) internal successors, (283), 5 states have internal predecessors, (283), 3 states have call successors, (216), 3 states have call predecessors, (216), 2 states have return successors, (214), 3 states have call predecessors, (214), 3 states have call successors, (214) [2023-12-02 18:32:24,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:32:26,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:32:28,264 WARN L539 Checker$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 18:32:49,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:32:51,916 WARN L539 Checker$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 18:32:53,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:32:55,937 WARN L539 Checker$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 18:32:56,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:56,999 INFO L93 Difference]: Finished difference Result 7007 states and 10695 transitions. [2023-12-02 18:32:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:32:57,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 47.166666666666664) internal successors, (283), 5 states have internal predecessors, (283), 3 states have call successors, (216), 3 states have call predecessors, (216), 2 states have return successors, (214), 3 states have call predecessors, (214), 3 states have call successors, (214) Word has length 922 [2023-12-02 18:32:57,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:57,074 INFO L225 Difference]: With dead ends: 7007 [2023-12-02 18:32:57,074 INFO L226 Difference]: Without dead ends: 7005 [2023-12-02 18:32:57,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:32:57,082 INFO L413 NwaCegarLoop]: 2129 mSDtfsCounter, 5348 mSDsluCounter, 7063 mSDsCounter, 0 mSdLazyCounter, 6824 mSolverCounterSat, 5273 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6264 SdHoareTripleChecker+Valid, 9192 SdHoareTripleChecker+Invalid, 12104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5273 IncrementalHoareTripleChecker+Valid, 6824 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:57,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6264 Valid, 9192 Invalid, 12104 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5273 Valid, 6824 Invalid, 7 Unknown, 0 Unchecked, 36.4s Time] [2023-12-02 18:32:57,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7005 states. [2023-12-02 18:32:59,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7005 to 6954. [2023-12-02 18:32:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6954 states, 4019 states have (on average 1.2040308534461308) internal successors, (4839), 4049 states have internal predecessors, (4839), 2875 states have call successors, (2875), 58 states have call predecessors, (2875), 59 states have return successors, (2929), 2847 states have call predecessors, (2929), 2873 states have call successors, (2929) [2023-12-02 18:32:59,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6954 states to 6954 states and 10643 transitions. [2023-12-02 18:32:59,430 INFO L78 Accepts]: Start accepts. Automaton has 6954 states and 10643 transitions. Word has length 922 [2023-12-02 18:32:59,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:59,435 INFO L495 AbstractCegarLoop]: Abstraction has 6954 states and 10643 transitions. [2023-12-02 18:32:59,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 47.166666666666664) internal successors, (283), 5 states have internal predecessors, (283), 3 states have call successors, (216), 3 states have call predecessors, (216), 2 states have return successors, (214), 3 states have call predecessors, (214), 3 states have call successors, (214) [2023-12-02 18:32:59,436 INFO L276 IsEmpty]: Start isEmpty. Operand 6954 states and 10643 transitions. [2023-12-02 18:32:59,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2023-12-02 18:32:59,451 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:59,452 INFO L195 NwaCegarLoop]: trace histogram [209, 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] [2023-12-02 18:32:59,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 18:32:59,452 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:32:59,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:59,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1535029946, now seen corresponding path program 1 times [2023-12-02 18:32:59,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:59,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628519731] [2023-12-02 18:32:59,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:59,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat