./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.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_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/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_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/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_47733bb7-e233-439a-a2fb-d4f85931900c/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 a46e7920fd800fb5978581c250ecd4216776e6eac1b8dfb89d2f8a9c2732a33c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:08:09,171 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:08:09,233 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 15:08:09,237 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:08:09,238 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:08:09,259 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:08:09,259 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:08:09,260 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:08:09,261 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:08:09,261 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:08:09,262 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:08:09,262 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:08:09,263 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:08:09,263 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:08:09,264 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:08:09,264 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:08:09,265 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:08:09,265 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:08:09,265 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:08:09,266 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:08:09,266 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:08:09,272 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:08:09,272 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:08:09,273 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 15:08:09,273 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:08:09,273 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:08:09,274 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:08:09,274 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:08:09,274 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 15:08:09,275 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:08:09,275 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 15:08:09,276 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:08:09,276 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 15:08:09,276 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:08:09,276 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:08:09,277 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:08:09,277 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:08:09,277 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:08:09,277 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:08:09,278 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:08:09,278 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 15:08:09,278 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:08:09,278 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:08:09,279 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:08:09,279 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 15:08:09,279 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:08:09,279 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:08:09,279 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_47733bb7-e233-439a-a2fb-d4f85931900c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a46e7920fd800fb5978581c250ecd4216776e6eac1b8dfb89d2f8a9c2732a33c [2023-12-02 15:08:09,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:08:09,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:08:09,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:08:09,524 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:08:09,524 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:08:09,526 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c [2023-12-02 15:08:12,361 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:08:12,609 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:08:12,610 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c [2023-12-02 15:08:12,629 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/data/02351c0e7/2e15143a2c4b4a7ba7bb0b8619f0595e/FLAG2297d5506 [2023-12-02 15:08:12,644 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/data/02351c0e7/2e15143a2c4b4a7ba7bb0b8619f0595e [2023-12-02 15:08:12,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:08:12,648 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:08:12,649 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:08:12,650 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:08:12,655 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:08:12,656 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:08:12" (1/1) ... [2023-12-02 15:08:12,657 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73236cce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:08:12, skipping insertion in model container [2023-12-02 15:08:12,657 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:08:12" (1/1) ... [2023-12-02 15:08:12,731 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:08:12,900 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_47733bb7-e233-439a-a2fb-d4f85931900c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c[914,927] [2023-12-02 15:08:12,958 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_47733bb7-e233-439a-a2fb-d4f85931900c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c[7115,7128] [2023-12-02 15:08:13,065 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:08:13,089 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:08:13,099 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_47733bb7-e233-439a-a2fb-d4f85931900c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c[914,927] [2023-12-02 15:08:13,117 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_47733bb7-e233-439a-a2fb-d4f85931900c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c[7115,7128] [2023-12-02 15:08:13,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:08:13,196 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:08:13,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:08:13 WrapperNode [2023-12-02 15:08:13,197 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:08:13,198 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:08:13,198 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:08:13,198 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:08:13,203 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:08:13" (1/1) ... [2023-12-02 15:08:13,218 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:08:13" (1/1) ... [2023-12-02 15:08:13,269 INFO L138 Inliner]: procedures = 77, calls = 93, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 1070 [2023-12-02 15:08:13,269 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:08:13,270 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:08:13,270 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:08:13,270 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:08:13,280 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:08:13" (1/1) ... [2023-12-02 15:08:13,280 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:08:13" (1/1) ... [2023-12-02 15:08:13,286 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:08:13" (1/1) ... [2023-12-02 15:08:13,287 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:08:13" (1/1) ... [2023-12-02 15:08:13,307 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:08:13" (1/1) ... [2023-12-02 15:08:13,325 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:08:13" (1/1) ... [2023-12-02 15:08:13,329 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:08:13" (1/1) ... [2023-12-02 15:08:13,334 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:08:13" (1/1) ... [2023-12-02 15:08:13,343 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:08:13,344 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:08:13,345 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:08:13,345 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:08:13,346 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:08:13" (1/1) ... [2023-12-02 15:08:13,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:08:13,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:08:13,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:08:13,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:08:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:08:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 15:08:13,422 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 15:08:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-12-02 15:08:13,423 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-12-02 15:08:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-02 15:08:13,423 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-02 15:08:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-02 15:08:13,423 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-02 15:08:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-12-02 15:08:13,423 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-12-02 15:08:13,424 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-02 15:08:13,424 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-02 15:08:13,424 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-02 15:08:13,424 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-02 15:08:13,424 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-12-02 15:08:13,424 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-12-02 15:08:13,425 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-12-02 15:08:13,425 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-12-02 15:08:13,425 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-12-02 15:08:13,425 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-12-02 15:08:13,425 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-02 15:08:13,425 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-02 15:08:13,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 15:08:13,426 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-02 15:08:13,426 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-02 15:08:13,426 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-12-02 15:08:13,426 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-12-02 15:08:13,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:08:13,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:08:13,426 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-02 15:08:13,427 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-02 15:08:13,573 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:08:13,575 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:08:14,440 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:08:14,839 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:08:14,840 INFO L309 CfgBuilder]: Removed 19 assume(true) statements. [2023-12-02 15:08:14,841 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:08:14 BoogieIcfgContainer [2023-12-02 15:08:14,841 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:08:14,843 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:08:14,843 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:08:14,846 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:08:14,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:08:12" (1/3) ... [2023-12-02 15:08:14,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287e86e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:08:14, skipping insertion in model container [2023-12-02 15:08:14,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:08:13" (2/3) ... [2023-12-02 15:08:14,847 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287e86e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:08:14, skipping insertion in model container [2023-12-02 15:08:14,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:08:14" (3/3) ... [2023-12-02 15:08:14,848 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.12.cil-2.c [2023-12-02 15:08:14,863 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:08:14,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 15:08:14,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:08:14,916 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;@53b973e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:08:14,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 15:08:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 273 states, 216 states have (on average 1.5092592592592593) internal successors, (326), 222 states have internal predecessors, (326), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-02 15:08:14,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 15:08:14,932 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:08:14,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:08:14,933 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:08:14,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:08:14,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1436028559, now seen corresponding path program 1 times [2023-12-02 15:08:14,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:08:14,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824324744] [2023-12-02 15:08:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:08:14,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:08:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:08:15,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:08:15,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:08:15,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824324744] [2023-12-02 15:08:15,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824324744] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:08:15,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:08:15,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:08:15,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3529287] [2023-12-02 15:08:15,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:08:15,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:08:15,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:08:15,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:08:15,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:08:15,302 INFO L87 Difference]: Start difference. First operand has 273 states, 216 states have (on average 1.5092592592592593) internal successors, (326), 222 states have internal predecessors, (326), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 15:08:15,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:08:15,756 INFO L93 Difference]: Finished difference Result 597 states and 883 transitions. [2023-12-02 15:08:15,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:08:15,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-12-02 15:08:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:08:15,773 INFO L225 Difference]: With dead ends: 597 [2023-12-02 15:08:15,773 INFO L226 Difference]: Without dead ends: 328 [2023-12-02 15:08:15,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:08:15,783 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 454 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:08:15,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 674 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:08:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-12-02 15:08:15,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 321. [2023-12-02 15:08:15,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 251 states have (on average 1.4302788844621515) internal successors, (359), 255 states have internal predecessors, (359), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-12-02 15:08:15,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 453 transitions. [2023-12-02 15:08:15,862 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 453 transitions. Word has length 45 [2023-12-02 15:08:15,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:08:15,863 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 453 transitions. [2023-12-02 15:08:15,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 15:08:15,863 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 453 transitions. [2023-12-02 15:08:15,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 15:08:15,866 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:08:15,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:08:15,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 15:08:15,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:08:15,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:08:15,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1939964114, now seen corresponding path program 1 times [2023-12-02 15:08:15,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:08:15,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77800667] [2023-12-02 15:08:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:08:15,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:08:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:08:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:08:16,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:08:16,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77800667] [2023-12-02 15:08:16,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77800667] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:08:16,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:08:16,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:08:16,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468190315] [2023-12-02 15:08:16,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:08:16,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:08:16,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:08:16,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:08:16,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:08:16,011 INFO L87 Difference]: Start difference. First operand 321 states and 453 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 15:08:16,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:08:16,826 INFO L93 Difference]: Finished difference Result 723 states and 956 transitions. [2023-12-02 15:08:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:08:16,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-12-02 15:08:16,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:08:16,835 INFO L225 Difference]: With dead ends: 723 [2023-12-02 15:08:16,835 INFO L226 Difference]: Without dead ends: 591 [2023-12-02 15:08:16,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:08:16,837 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 934 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:08:16,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 1136 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 15:08:16,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2023-12-02 15:08:16,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 507. [2023-12-02 15:08:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 383 states have (on average 1.3550913838120104) internal successors, (519), 388 states have internal predecessors, (519), 75 states have call successors, (75), 44 states have call predecessors, (75), 47 states have return successors, (77), 76 states have call predecessors, (77), 73 states have call successors, (77) [2023-12-02 15:08:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 671 transitions. [2023-12-02 15:08:16,900 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 671 transitions. Word has length 45 [2023-12-02 15:08:16,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:08:16,900 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 671 transitions. [2023-12-02 15:08:16,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 15:08:16,901 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 671 transitions. [2023-12-02 15:08:16,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 15:08:16,903 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:08:16,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:08:16,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 15:08:16,904 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:08:16,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:08:16,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1258111841, now seen corresponding path program 1 times [2023-12-02 15:08:16,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:08:16,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511492401] [2023-12-02 15:08:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:08:16,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:08:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:08:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:08:17,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:08:17,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511492401] [2023-12-02 15:08:17,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511492401] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:08:17,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:08:17,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 15:08:17,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870089002] [2023-12-02 15:08:17,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:08:17,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:08:17,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:08:17,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:08:17,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:08:17,176 INFO L87 Difference]: Start difference. First operand 507 states and 671 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 15:08:18,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:08:18,128 INFO L93 Difference]: Finished difference Result 1023 states and 1287 transitions. [2023-12-02 15:08:18,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 15:08:18,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2023-12-02 15:08:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:08:18,135 INFO L225 Difference]: With dead ends: 1023 [2023-12-02 15:08:18,135 INFO L226 Difference]: Without dead ends: 721 [2023-12-02 15:08:18,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-02 15:08:18,137 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 547 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:08:18,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 1017 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 15:08:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2023-12-02 15:08:18,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 686. [2023-12-02 15:08:18,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 508 states have (on average 1.3208661417322836) internal successors, (671), 514 states have internal predecessors, (671), 102 states have call successors, (102), 67 states have call predecessors, (102), 74 states have return successors, (108), 106 states have call predecessors, (108), 100 states have call successors, (108) [2023-12-02 15:08:18,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 881 transitions. [2023-12-02 15:08:18,200 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 881 transitions. Word has length 46 [2023-12-02 15:08:18,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:08:18,201 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 881 transitions. [2023-12-02 15:08:18,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 15:08:18,201 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 881 transitions. [2023-12-02 15:08:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 15:08:18,204 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:08:18,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:08:18,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 15:08:18,204 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:08:18,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:08:18,205 INFO L85 PathProgramCache]: Analyzing trace with hash 335758205, now seen corresponding path program 1 times [2023-12-02 15:08:18,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:08:18,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160828941] [2023-12-02 15:08:18,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:08:18,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:08:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:08:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:08:18,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:08:18,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160828941] [2023-12-02 15:08:18,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160828941] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:08:18,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:08:18,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:08:18,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120424127] [2023-12-02 15:08:18,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:08:18,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:08:18,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:08:18,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:08:18,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:08:18,260 INFO L87 Difference]: Start difference. First operand 686 states and 881 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 15:08:18,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:08:18,442 INFO L93 Difference]: Finished difference Result 1250 states and 1551 transitions. [2023-12-02 15:08:18,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:08:18,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-12-02 15:08:18,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:08:18,449 INFO L225 Difference]: With dead ends: 1250 [2023-12-02 15:08:18,449 INFO L226 Difference]: Without dead ends: 818 [2023-12-02 15:08:18,451 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 15:08:18,452 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 67 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:08:18,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 639 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:08:18,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2023-12-02 15:08:18,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 713. [2023-12-02 15:08:18,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 531 states have (on average 1.310734463276836) internal successors, (696), 537 states have internal predecessors, (696), 104 states have call successors, (104), 69 states have call predecessors, (104), 76 states have return successors, (110), 108 states have call predecessors, (110), 102 states have call successors, (110) [2023-12-02 15:08:18,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 910 transitions. [2023-12-02 15:08:18,520 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 910 transitions. Word has length 47 [2023-12-02 15:08:18,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:08:18,521 INFO L495 AbstractCegarLoop]: Abstraction has 713 states and 910 transitions. [2023-12-02 15:08:18,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 15:08:18,522 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 910 transitions. [2023-12-02 15:08:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 15:08:18,524 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:08:18,524 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:08:18,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 15:08:18,525 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:08:18,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:08:18,525 INFO L85 PathProgramCache]: Analyzing trace with hash 971117201, now seen corresponding path program 1 times [2023-12-02 15:08:18,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:08:18,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479596252] [2023-12-02 15:08:18,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:08:18,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:08:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:08:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:08:18,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:08:18,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479596252] [2023-12-02 15:08:18,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479596252] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:08:18,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:08:18,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:08:18,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076900813] [2023-12-02 15:08:18,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:08:18,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:08:18,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:08:18,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:08:18,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:08:18,584 INFO L87 Difference]: Start difference. First operand 713 states and 910 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 15:08:18,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:08:18,757 INFO L93 Difference]: Finished difference Result 903 states and 1131 transitions. [2023-12-02 15:08:18,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:08:18,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2023-12-02 15:08:18,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:08:18,762 INFO L225 Difference]: With dead ends: 903 [2023-12-02 15:08:18,762 INFO L226 Difference]: Without dead ends: 630 [2023-12-02 15:08:18,763 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 15:08:18,764 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 359 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:08:18,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 398 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:08:18,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2023-12-02 15:08:18,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 521. [2023-12-02 15:08:18,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 391 states have (on average 1.3145780051150895) internal successors, (514), 395 states have internal predecessors, (514), 80 states have call successors, (80), 49 states have call predecessors, (80), 48 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-02 15:08:18,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 672 transitions. [2023-12-02 15:08:18,811 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 672 transitions. Word has length 53 [2023-12-02 15:08:18,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:08:18,812 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 672 transitions. [2023-12-02 15:08:18,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 15:08:18,812 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 672 transitions. [2023-12-02 15:08:18,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 15:08:18,814 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:08:18,814 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:08:18,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 15:08:18,815 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:08:18,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:08:18,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1847688771, now seen corresponding path program 1 times [2023-12-02 15:08:18,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:08:18,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104210929] [2023-12-02 15:08:18,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:08:18,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:08:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:08:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:08:18,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:08:18,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104210929] [2023-12-02 15:08:18,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104210929] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:08:18,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:08:18,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:08:18,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8652408] [2023-12-02 15:08:18,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:08:18,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:08:18,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:08:18,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:08:18,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:08:18,904 INFO L87 Difference]: Start difference. First operand 521 states and 672 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 15:08:19,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:08:19,228 INFO L93 Difference]: Finished difference Result 624 states and 788 transitions. [2023-12-02 15:08:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:08:19,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2023-12-02 15:08:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:08:19,233 INFO L225 Difference]: With dead ends: 624 [2023-12-02 15:08:19,233 INFO L226 Difference]: Without dead ends: 621 [2023-12-02 15:08:19,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:08:19,235 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 655 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:08:19,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 369 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:08:19,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2023-12-02 15:08:19,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 520. [2023-12-02 15:08:19,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 391 states have (on average 1.3069053708439897) internal successors, (511), 394 states have internal predecessors, (511), 79 states have call successors, (79), 49 states have call predecessors, (79), 48 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-02 15:08:19,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 668 transitions. [2023-12-02 15:08:19,305 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 668 transitions. Word has length 54 [2023-12-02 15:08:19,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:08:19,305 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 668 transitions. [2023-12-02 15:08:19,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 15:08:19,306 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 668 transitions. [2023-12-02 15:08:19,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 15:08:19,307 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:08:19,307 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:08:19,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 15:08:19,308 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:08:19,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:08:19,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1445223322, now seen corresponding path program 1 times [2023-12-02 15:08:19,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:08:19,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651226803] [2023-12-02 15:08:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:08:19,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:08:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:08:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:08:19,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:08:19,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651226803] [2023-12-02 15:08:19,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651226803] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:08:19,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119942428] [2023-12-02 15:08:19,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:08:19,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:08:19,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:08:19,459 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:08:19,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 15:08:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:08:19,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 15:08:19,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:08:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:08:19,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:08:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:08:19,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119942428] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:08:19,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2067871259] [2023-12-02 15:08:19,945 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 15:08:19,946 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:08:19,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:08:19,954 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:08:19,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:08:27,474 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 211 for LOIs [2023-12-02 15:08:27,587 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 207 for LOIs [2023-12-02 15:08:27,689 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 215 for LOIs [2023-12-02 15:08:29,231 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 211 for LOIs [2023-12-02 15:08:29,547 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 211 for LOIs [2023-12-02 15:08:29,868 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 211 for LOIs [2023-12-02 15:08:29,970 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 218 for LOIs [2023-12-02 15:08:30,077 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:08:57,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2067871259] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:08:57,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:08:57,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-12-02 15:08:57,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572745636] [2023-12-02 15:08:57,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:08:57,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 15:08:57,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:08:57,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 15:08:57,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 15:08:57,496 INFO L87 Difference]: Start difference. First operand 520 states and 668 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 15:09:33,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:09:33,468 INFO L93 Difference]: Finished difference Result 884 states and 1079 transitions. [2023-12-02 15:09:33,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 15:09:33,469 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2023-12-02 15:09:33,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:09:33,472 INFO L225 Difference]: With dead ends: 884 [2023-12-02 15:09:33,473 INFO L226 Difference]: Without dead ends: 569 [2023-12-02 15:09:33,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 51.5s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 15:09:33,476 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 163 mSDsluCounter, 2178 mSDsCounter, 0 mSdLazyCounter, 5422 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 2478 SdHoareTripleChecker+Invalid, 5571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 5422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:09:33,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 2478 Invalid, 5571 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [149 Valid, 5422 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2023-12-02 15:09:33,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2023-12-02 15:09:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 554. [2023-12-02 15:09:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 417 states have (on average 1.2925659472422062) internal successors, (539), 420 states have internal predecessors, (539), 81 states have call successors, (81), 55 states have call predecessors, (81), 54 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-12-02 15:09:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 700 transitions. [2023-12-02 15:09:33,598 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 700 transitions. Word has length 55 [2023-12-02 15:09:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:09:33,598 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 700 transitions. [2023-12-02 15:09:33,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 15:09:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 700 transitions. [2023-12-02 15:09:33,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 15:09:33,600 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:09:33,601 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:09:33,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 15:09:33,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:09:33,801 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:09:33,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:09:33,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1191341160, now seen corresponding path program 1 times [2023-12-02 15:09:33,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:09:33,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337332349] [2023-12-02 15:09:33,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:09:33,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:09:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:09:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:09:33,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:09:33,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337332349] [2023-12-02 15:09:33,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337332349] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:09:33,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:09:33,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:09:33,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537629918] [2023-12-02 15:09:33,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:09:33,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:09:33,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:09:33,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:09:33,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:09:33,869 INFO L87 Difference]: Start difference. First operand 554 states and 700 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 15:09:34,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:09:34,113 INFO L93 Difference]: Finished difference Result 835 states and 1022 transitions. [2023-12-02 15:09:34,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:09:34,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2023-12-02 15:09:34,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:09:34,119 INFO L225 Difference]: With dead ends: 835 [2023-12-02 15:09:34,119 INFO L226 Difference]: Without dead ends: 666 [2023-12-02 15:09:34,120 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 15:09:34,121 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 42 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:09:34,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 685 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:09:34,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2023-12-02 15:09:34,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 589. [2023-12-02 15:09:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 446 states have (on average 1.289237668161435) internal successors, (575), 449 states have internal predecessors, (575), 84 states have call successors, (84), 58 states have call predecessors, (84), 57 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2023-12-02 15:09:34,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 742 transitions. [2023-12-02 15:09:34,243 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 742 transitions. Word has length 61 [2023-12-02 15:09:34,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:09:34,243 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 742 transitions. [2023-12-02 15:09:34,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 15:09:34,243 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 742 transitions. [2023-12-02 15:09:34,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 15:09:34,245 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:09:34,245 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:09:34,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 15:09:34,245 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:09:34,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:09:34,246 INFO L85 PathProgramCache]: Analyzing trace with hash 855382066, now seen corresponding path program 1 times [2023-12-02 15:09:34,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:09:34,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415113002] [2023-12-02 15:09:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:09:34,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:09:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:09:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:09:34,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:09:34,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415113002] [2023-12-02 15:09:34,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415113002] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:09:34,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:09:34,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 15:09:34,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998622152] [2023-12-02 15:09:34,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:09:34,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:09:34,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:09:34,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:09:34,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:09:34,406 INFO L87 Difference]: Start difference. First operand 589 states and 742 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 15:09:35,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:09:35,261 INFO L93 Difference]: Finished difference Result 1052 states and 1268 transitions. [2023-12-02 15:09:35,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 15:09:35,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2023-12-02 15:09:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:09:35,265 INFO L225 Difference]: With dead ends: 1052 [2023-12-02 15:09:35,266 INFO L226 Difference]: Without dead ends: 749 [2023-12-02 15:09:35,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-02 15:09:35,267 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 531 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:09:35,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 975 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 15:09:35,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2023-12-02 15:09:35,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 728. [2023-12-02 15:09:35,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 540 states have (on average 1.2555555555555555) internal successors, (678), 543 states have internal predecessors, (678), 108 states have call successors, (108), 79 states have call predecessors, (108), 78 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2023-12-02 15:09:35,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 893 transitions. [2023-12-02 15:09:35,361 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 893 transitions. Word has length 63 [2023-12-02 15:09:35,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:09:35,361 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 893 transitions. [2023-12-02 15:09:35,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 15:09:35,361 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 893 transitions. [2023-12-02 15:09:35,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 15:09:35,363 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:09:35,363 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:09:35,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 15:09:35,363 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:09:35,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:09:35,364 INFO L85 PathProgramCache]: Analyzing trace with hash 285876529, now seen corresponding path program 1 times [2023-12-02 15:09:35,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:09:35,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164162650] [2023-12-02 15:09:35,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:09:35,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:09:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:09:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:09:35,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:09:35,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164162650] [2023-12-02 15:09:35,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164162650] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:09:35,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28769968] [2023-12-02 15:09:35,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:09:35,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:09:35,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:09:35,472 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:09:35,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 15:09:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:09:35,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 15:09:35,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:09:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:09:35,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:09:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:09:35,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28769968] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:09:35,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [439349866] [2023-12-02 15:09:35,844 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 15:09:35,844 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:09:35,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:09:35,845 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:09:35,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:09:57,013 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 211 for LOIs [2023-12-02 15:09:57,118 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 210 for LOIs [2023-12-02 15:09:57,812 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 178 for LOIs [2023-12-02 15:09:58,452 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 215 for LOIs [2023-12-02 15:09:59,985 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 211 for LOIs [2023-12-02 15:10:00,300 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 211 for LOIs [2023-12-02 15:10:00,621 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 211 for LOIs [2023-12-02 15:10:00,723 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 218 for LOIs [2023-12-02 15:10:00,830 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:10:35,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18309#(and (= ~q_req_up~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| 0)) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| 2147483648)) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| 2147483647))) (= ~q_free~0 1) (exists ((|v_ULTIMATE.start_start_simulation1_~kernel_st~0#1_BEFORE_CALL_30| Int) (v_~c_last_read~0_10 Int) (v_~q_free~0_42 Int) (|v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1| Int)) (and (= ~E_12~0 2) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (not (= ~p_dw_st~0 0)) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= v_~c_last_read~0_10 0) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1|) (= |v_ULTIMATE.start_start_simulation1_~kernel_st~0#1_BEFORE_CALL_30| 1) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (= ~t11_pc~0 0) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~t12_pc~0 0) (= ~E_2~0 2) (not (= v_~q_free~0_42 1)) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1| 0)) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1| 1) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t11_st~0 0) (<= v_~q_free~0_42 1) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (= ~t1_i~0 0))) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_dr_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2023-12-02 15:10:35,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:10:35,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:10:35,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-12-02 15:10:35,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888140403] [2023-12-02 15:10:35,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:10:35,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:10:35,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:10:35,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:10:35,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1938, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 15:10:35,585 INFO L87 Difference]: Start difference. First operand 728 states and 893 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-12-02 15:10:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:10:36,190 INFO L93 Difference]: Finished difference Result 1822 states and 2134 transitions. [2023-12-02 15:10:36,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:10:36,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2023-12-02 15:10:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:10:36,199 INFO L225 Difference]: With dead ends: 1822 [2023-12-02 15:10:36,199 INFO L226 Difference]: Without dead ends: 1819 [2023-12-02 15:10:36,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=224, Invalid=1938, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 15:10:36,202 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 851 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:10:36,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 1329 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:10:36,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1819 states. [2023-12-02 15:10:36,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1819 to 1242. [2023-12-02 15:10:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 896 states have (on average 1.2243303571428572) internal successors, (1097), 899 states have internal predecessors, (1097), 192 states have call successors, (192), 153 states have call predecessors, (192), 152 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2023-12-02 15:10:36,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 1480 transitions. [2023-12-02 15:10:36,366 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 1480 transitions. Word has length 64 [2023-12-02 15:10:36,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:10:36,366 INFO L495 AbstractCegarLoop]: Abstraction has 1242 states and 1480 transitions. [2023-12-02 15:10:36,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-12-02 15:10:36,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 1480 transitions. [2023-12-02 15:10:36,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 15:10:36,368 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:10:36,369 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-02 15:10:36,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 15:10:36,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:10:36,569 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:10:36,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:10:36,570 INFO L85 PathProgramCache]: Analyzing trace with hash -412905222, now seen corresponding path program 2 times [2023-12-02 15:10:36,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:10:36,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085685283] [2023-12-02 15:10:36,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:10:36,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:10:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:10:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:10:36,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:10:36,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085685283] [2023-12-02 15:10:36,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085685283] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:10:36,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:10:36,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:10:36,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982119256] [2023-12-02 15:10:36,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:10:36,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:10:36,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:10:36,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:10:36,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:10:36,616 INFO L87 Difference]: Start difference. First operand 1242 states and 1480 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 15:10:36,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:10:36,898 INFO L93 Difference]: Finished difference Result 1994 states and 2336 transitions. [2023-12-02 15:10:36,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:10:36,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2023-12-02 15:10:36,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:10:36,905 INFO L225 Difference]: With dead ends: 1994 [2023-12-02 15:10:36,905 INFO L226 Difference]: Without dead ends: 1238 [2023-12-02 15:10:36,907 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 15:10:36,908 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 362 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:10:36,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 434 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:10:36,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2023-12-02 15:10:37,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1227. [2023-12-02 15:10:37,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 881 states have (on average 1.2111237230419978) internal successors, (1067), 884 states have internal predecessors, (1067), 192 states have call successors, (192), 153 states have call predecessors, (192), 152 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2023-12-02 15:10:37,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1450 transitions. [2023-12-02 15:10:37,053 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1450 transitions. Word has length 67 [2023-12-02 15:10:37,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:10:37,053 INFO L495 AbstractCegarLoop]: Abstraction has 1227 states and 1450 transitions. [2023-12-02 15:10:37,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 15:10:37,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1450 transitions. [2023-12-02 15:10:37,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 15:10:37,055 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:10:37,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:10:37,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 15:10:37,055 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:10:37,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:10:37,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1597699179, now seen corresponding path program 1 times [2023-12-02 15:10:37,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:10:37,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339596485] [2023-12-02 15:10:37,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:10:37,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:10:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:10:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:10:37,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:10:37,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339596485] [2023-12-02 15:10:37,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339596485] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:10:37,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:10:37,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:10:37,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24771525] [2023-12-02 15:10:37,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:10:37,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:10:37,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:10:37,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:10:37,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:10:37,172 INFO L87 Difference]: Start difference. First operand 1227 states and 1450 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 15:10:38,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:10:38,051 INFO L93 Difference]: Finished difference Result 2170 states and 2974 transitions. [2023-12-02 15:10:38,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:10:38,052 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2023-12-02 15:10:38,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:10:38,062 INFO L225 Difference]: With dead ends: 2170 [2023-12-02 15:10:38,062 INFO L226 Difference]: Without dead ends: 1976 [2023-12-02 15:10:38,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:10:38,065 INFO L413 NwaCegarLoop]: 544 mSDtfsCounter, 1516 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1518 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:10:38,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1518 Valid, 1419 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 15:10:38,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2023-12-02 15:10:38,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1965. [2023-12-02 15:10:38,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1510 states have (on average 1.3251655629139072) internal successors, (2001), 1516 states have internal predecessors, (2001), 277 states have call successors, (277), 177 states have call predecessors, (277), 176 states have return successors, (338), 273 states have call predecessors, (338), 276 states have call successors, (338) [2023-12-02 15:10:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2616 transitions. [2023-12-02 15:10:38,274 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2616 transitions. Word has length 67 [2023-12-02 15:10:38,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:10:38,274 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 2616 transitions. [2023-12-02 15:10:38,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 15:10:38,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2616 transitions. [2023-12-02 15:10:38,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-02 15:10:38,276 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:10:38,276 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-02 15:10:38,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 15:10:38,276 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:10:38,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:10:38,276 INFO L85 PathProgramCache]: Analyzing trace with hash -968836614, now seen corresponding path program 1 times [2023-12-02 15:10:38,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:10:38,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430865628] [2023-12-02 15:10:38,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:10:38,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:10:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:10:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:10:38,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:10:38,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430865628] [2023-12-02 15:10:38,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430865628] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:10:38,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:10:38,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:10:38,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031408981] [2023-12-02 15:10:38,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:10:38,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:10:38,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:10:38,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:10:38,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:10:38,320 INFO L87 Difference]: Start difference. First operand 1965 states and 2616 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 15:10:38,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:10:38,660 INFO L93 Difference]: Finished difference Result 2931 states and 3710 transitions. [2023-12-02 15:10:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:10:38,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2023-12-02 15:10:38,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:10:38,672 INFO L225 Difference]: With dead ends: 2931 [2023-12-02 15:10:38,672 INFO L226 Difference]: Without dead ends: 2141 [2023-12-02 15:10:38,675 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 15:10:38,676 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 37 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:10:38,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 676 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:10:38,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2023-12-02 15:10:39,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 2012. [2023-12-02 15:10:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 1549 states have (on average 1.3214977404777275) internal successors, (2047), 1555 states have internal predecessors, (2047), 281 states have call successors, (281), 181 states have call predecessors, (281), 180 states have return successors, (342), 277 states have call predecessors, (342), 280 states have call successors, (342) [2023-12-02 15:10:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 2670 transitions. [2023-12-02 15:10:39,017 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 2670 transitions. Word has length 71 [2023-12-02 15:10:39,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:10:39,017 INFO L495 AbstractCegarLoop]: Abstraction has 2012 states and 2670 transitions. [2023-12-02 15:10:39,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 15:10:39,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 2670 transitions. [2023-12-02 15:10:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 15:10:39,020 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:10:39,021 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:10:39,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 15:10:39,021 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:10:39,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:10:39,022 INFO L85 PathProgramCache]: Analyzing trace with hash -478780492, now seen corresponding path program 1 times [2023-12-02 15:10:39,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:10:39,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857296570] [2023-12-02 15:10:39,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:10:39,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:10:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:10:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 15:10:39,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:10:39,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857296570] [2023-12-02 15:10:39,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857296570] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:10:39,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108218661] [2023-12-02 15:10:39,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:10:39,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:10:39,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:10:39,424 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:10:39,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 15:10:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:10:39,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:10:39,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:10:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:10:39,625 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:10:39,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108218661] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:10:39,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:10:39,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2023-12-02 15:10:39,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946358895] [2023-12-02 15:10:39,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:10:39,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:10:39,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:10:39,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:10:39,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-12-02 15:10:39,628 INFO L87 Difference]: Start difference. First operand 2012 states and 2670 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 15:10:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:10:40,167 INFO L93 Difference]: Finished difference Result 2874 states and 3674 transitions. [2023-12-02 15:10:40,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:10:40,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2023-12-02 15:10:40,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:10:40,175 INFO L225 Difference]: With dead ends: 2874 [2023-12-02 15:10:40,175 INFO L226 Difference]: Without dead ends: 1827 [2023-12-02 15:10:40,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-12-02 15:10:40,179 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 356 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:10:40,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 1395 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:10:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2023-12-02 15:10:40,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1642. [2023-12-02 15:10:40,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1311 states have (on average 1.3546910755148742) internal successors, (1776), 1317 states have internal predecessors, (1776), 210 states have call successors, (210), 120 states have call predecessors, (210), 119 states have return successors, (271), 206 states have call predecessors, (271), 209 states have call successors, (271) [2023-12-02 15:10:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2257 transitions. [2023-12-02 15:10:40,451 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2257 transitions. Word has length 102 [2023-12-02 15:10:40,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:10:40,451 INFO L495 AbstractCegarLoop]: Abstraction has 1642 states and 2257 transitions. [2023-12-02 15:10:40,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 15:10:40,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2257 transitions. [2023-12-02 15:10:40,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 15:10:40,455 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:10:40,455 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:10:40,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 15:10:40,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:10:40,660 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:10:40,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:10:40,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2041208026, now seen corresponding path program 1 times [2023-12-02 15:10:40,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:10:40,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723895976] [2023-12-02 15:10:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:10:40,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:10:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:10:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 15:10:40,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:10:40,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723895976] [2023-12-02 15:10:40,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723895976] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:10:40,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055139090] [2023-12-02 15:10:40,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:10:40,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:10:40,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:10:40,802 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:10:40,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 15:10:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:10:40,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 15:10:40,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:10:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:10:41,046 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:10:41,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055139090] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:10:41,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:10:41,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-12-02 15:10:41,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729473121] [2023-12-02 15:10:41,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:10:41,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:10:41,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:10:41,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:10:41,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-12-02 15:10:41,048 INFO L87 Difference]: Start difference. First operand 1642 states and 2257 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 15:10:41,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:10:41,496 INFO L93 Difference]: Finished difference Result 2191 states and 2882 transitions. [2023-12-02 15:10:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:10:41,496 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2023-12-02 15:10:41,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:10:41,504 INFO L225 Difference]: With dead ends: 2191 [2023-12-02 15:10:41,504 INFO L226 Difference]: Without dead ends: 1598 [2023-12-02 15:10:41,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-12-02 15:10:41,506 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 62 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:10:41,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1750 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:10:41,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2023-12-02 15:10:41,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 1506. [2023-12-02 15:10:41,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1211 states have (on average 1.369942196531792) internal successors, (1659), 1217 states have internal predecessors, (1659), 191 states have call successors, (191), 103 states have call predecessors, (191), 102 states have return successors, (252), 187 states have call predecessors, (252), 190 states have call successors, (252) [2023-12-02 15:10:41,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2102 transitions. [2023-12-02 15:10:41,656 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2102 transitions. Word has length 112 [2023-12-02 15:10:41,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:10:41,656 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2102 transitions. [2023-12-02 15:10:41,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 15:10:41,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2102 transitions. [2023-12-02 15:10:41,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 15:10:41,658 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:10:41,658 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:10:41,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 15:10:41,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 15:10:41,860 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:10:41,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:10:41,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1073163766, now seen corresponding path program 1 times [2023-12-02 15:10:41,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:10:41,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63629819] [2023-12-02 15:10:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:10:41,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:10:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:10:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 15:10:42,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:10:42,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63629819] [2023-12-02 15:10:42,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63629819] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:10:42,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106458594] [2023-12-02 15:10:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:10:42,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:10:42,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:10:42,026 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:10:42,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 15:10:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:10:42,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:10:42,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:10:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 15:10:42,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:10:42,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106458594] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:10:42,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:10:42,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2023-12-02 15:10:42,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022537573] [2023-12-02 15:10:42,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:10:42,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:10:42,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:10:42,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:10:42,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:10:42,236 INFO L87 Difference]: Start difference. First operand 1506 states and 2102 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 15:10:42,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:10:42,623 INFO L93 Difference]: Finished difference Result 2255 states and 2947 transitions. [2023-12-02 15:10:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:10:42,624 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2023-12-02 15:10:42,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:10:42,633 INFO L225 Difference]: With dead ends: 2255 [2023-12-02 15:10:42,633 INFO L226 Difference]: Without dead ends: 1798 [2023-12-02 15:10:42,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:10:42,635 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 342 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 1500 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:10:42,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 1500 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:10:42,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2023-12-02 15:10:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1764. [2023-12-02 15:10:42,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1373 states have (on average 1.339402767662054) internal successors, (1839), 1385 states have internal predecessors, (1839), 239 states have call successors, (239), 145 states have call predecessors, (239), 150 states have return successors, (312), 235 states have call predecessors, (312), 238 states have call successors, (312) [2023-12-02 15:10:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 2390 transitions. [2023-12-02 15:10:42,830 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 2390 transitions. Word has length 113 [2023-12-02 15:10:42,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:10:42,830 INFO L495 AbstractCegarLoop]: Abstraction has 1764 states and 2390 transitions. [2023-12-02 15:10:42,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 15:10:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 2390 transitions. [2023-12-02 15:10:42,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-02 15:10:42,834 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:10:42,834 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:10:42,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 15:10:43,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 15:10:43,035 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:10:43,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:10:43,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1025616252, now seen corresponding path program 1 times [2023-12-02 15:10:43,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:10:43,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812132028] [2023-12-02 15:10:43,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:10:43,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:10:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:10:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 15:10:44,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:10:44,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812132028] [2023-12-02 15:10:44,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812132028] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:10:44,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733542968] [2023-12-02 15:10:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:10:44,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:10:44,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:10:44,034 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:10:44,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 15:10:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:10:44,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-02 15:10:44,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:10:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:10:44,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:10:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 15:10:46,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733542968] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:10:46,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [247551562] [2023-12-02 15:10:46,555 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2023-12-02 15:10:46,555 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:10:46,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:10:46,555 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:10:46,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:11:44,082 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 7 for LOIs [2023-12-02 15:11:44,084 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2023-12-02 15:11:44,086 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2023-12-02 15:11:44,089 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 224 for LOIs [2023-12-02 15:11:46,166 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 225 for LOIs [2023-12-02 15:11:48,186 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 16 for LOIs [2023-12-02 15:11:48,207 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 218 for LOIs [2023-12-02 15:11:48,560 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 229 for LOIs [2023-12-02 15:11:48,941 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:12:01,682 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '56220#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~p_last_write~0))' at error location [2023-12-02 15:12:01,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:12:01,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:12:01,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17, 16] total 55 [2023-12-02 15:12:01,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270206025] [2023-12-02 15:12:01,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:12:01,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-02 15:12:01,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:12:01,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-02 15:12:01,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=10900, Unknown=0, NotChecked=0, Total=11772 [2023-12-02 15:12:01,690 INFO L87 Difference]: Start difference. First operand 1764 states and 2390 transitions. Second operand has 55 states, 35 states have (on average 5.6) internal successors, (196), 39 states have internal predecessors, (196), 20 states have call successors, (44), 16 states have call predecessors, (44), 23 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) [2023-12-02 15:12:20,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:12:20,436 INFO L93 Difference]: Finished difference Result 4669 states and 5939 transitions. [2023-12-02 15:12:20,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 283 states. [2023-12-02 15:12:20,436 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 35 states have (on average 5.6) internal successors, (196), 39 states have internal predecessors, (196), 20 states have call successors, (44), 16 states have call predecessors, (44), 23 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) Word has length 114 [2023-12-02 15:12:20,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:12:20,453 INFO L225 Difference]: With dead ends: 4669 [2023-12-02 15:12:20,453 INFO L226 Difference]: Without dead ends: 3954 [2023-12-02 15:12:20,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 293 SyntacticMatches, 3 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 61247 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=13490, Invalid=135892, Unknown=0, NotChecked=0, Total=149382 [2023-12-02 15:12:20,478 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 5417 mSDsluCounter, 4806 mSDsCounter, 0 mSdLazyCounter, 8253 mSolverCounterSat, 2327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5417 SdHoareTripleChecker+Valid, 5108 SdHoareTripleChecker+Invalid, 10580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2327 IncrementalHoareTripleChecker+Valid, 8253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:12:20,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5417 Valid, 5108 Invalid, 10580 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2327 Valid, 8253 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-12-02 15:12:20,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2023-12-02 15:12:20,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 2040. [2023-12-02 15:12:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2040 states, 1557 states have (on average 1.3166345536287734) internal successors, (2050), 1571 states have internal predecessors, (2050), 284 states have call successors, (284), 182 states have call predecessors, (284), 197 states have return successors, (369), 288 states have call predecessors, (369), 283 states have call successors, (369) [2023-12-02 15:12:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 2703 transitions. [2023-12-02 15:12:20,782 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 2703 transitions. Word has length 114 [2023-12-02 15:12:20,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:12:20,782 INFO L495 AbstractCegarLoop]: Abstraction has 2040 states and 2703 transitions. [2023-12-02 15:12:20,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 35 states have (on average 5.6) internal successors, (196), 39 states have internal predecessors, (196), 20 states have call successors, (44), 16 states have call predecessors, (44), 23 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) [2023-12-02 15:12:20,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 2703 transitions. [2023-12-02 15:12:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 15:12:20,785 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:12:20,785 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:12:20,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 15:12:20,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 15:12:20,986 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:12:20,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:12:20,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2088099257, now seen corresponding path program 1 times [2023-12-02 15:12:20,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:12:20,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432183409] [2023-12-02 15:12:20,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:12:20,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:12:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:12:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 15:12:21,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:12:21,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432183409] [2023-12-02 15:12:21,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432183409] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:12:21,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888827652] [2023-12-02 15:12:21,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:12:21,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:12:21,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:12:21,339 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:12:21,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 15:12:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:12:21,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 15:12:21,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:12:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 15:12:21,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:12:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 15:12:21,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888827652] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 15:12:21,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:12:21,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2023-12-02 15:12:21,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560822036] [2023-12-02 15:12:21,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:12:21,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:12:21,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:12:21,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:12:21,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-12-02 15:12:21,763 INFO L87 Difference]: Start difference. First operand 2040 states and 2703 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 15:12:22,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:12:22,737 INFO L93 Difference]: Finished difference Result 3364 states and 4251 transitions. [2023-12-02 15:12:22,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:12:22,737 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2023-12-02 15:12:22,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:12:22,751 INFO L225 Difference]: With dead ends: 3364 [2023-12-02 15:12:22,751 INFO L226 Difference]: Without dead ends: 2373 [2023-12-02 15:12:22,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2023-12-02 15:12:22,754 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 550 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:12:22,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 622 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:12:22,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2023-12-02 15:12:23,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2120. [2023-12-02 15:12:23,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 1602 states have (on average 1.311485642946317) internal successors, (2101), 1619 states have internal predecessors, (2101), 303 states have call successors, (303), 191 states have call predecessors, (303), 213 states have return successors, (409), 311 states have call predecessors, (409), 302 states have call successors, (409) [2023-12-02 15:12:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 2813 transitions. [2023-12-02 15:12:23,112 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 2813 transitions. Word has length 115 [2023-12-02 15:12:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:12:23,112 INFO L495 AbstractCegarLoop]: Abstraction has 2120 states and 2813 transitions. [2023-12-02 15:12:23,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 15:12:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 2813 transitions. [2023-12-02 15:12:23,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-02 15:12:23,116 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:12:23,116 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:12:23,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 15:12:23,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 15:12:23,317 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:12:23,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:12:23,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1962984410, now seen corresponding path program 1 times [2023-12-02 15:12:23,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:12:23,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030826057] [2023-12-02 15:12:23,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:12:23,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:12:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:12:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 15:12:24,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:12:24,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030826057] [2023-12-02 15:12:24,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030826057] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:12:24,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765079021] [2023-12-02 15:12:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:12:24,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:12:24,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:12:24,025 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:12:24,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 15:12:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:12:24,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-02 15:12:24,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:12:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:12:24,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:12:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 15:12:26,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765079021] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:12:26,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1638655911] [2023-12-02 15:12:26,436 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2023-12-02 15:12:26,437 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:12:26,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:12:26,437 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:12:26,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:12:53,939 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 7 for LOIs [2023-12-02 15:12:53,942 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 77 for LOIs [2023-12-02 15:12:53,984 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2023-12-02 15:12:53,987 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 225 for LOIs [2023-12-02 15:12:56,028 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 226 for LOIs [2023-12-02 15:12:58,077 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 16 for LOIs [2023-12-02 15:12:58,098 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 219 for LOIs [2023-12-02 15:12:58,454 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 230 for LOIs [2023-12-02 15:12:58,833 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:13:13,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '74428#(and (= ~q_req_up~0 1) (exists ((v_~q_req_up~0_100 Int) (|v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| Int) (v_~q_free~0_104 Int)) (and (or (and (= v_~q_free~0_104 0) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0)) (and (<= v_~q_free~0_104 1) (<= 0 ~p_dw_pc~0) (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| 1) (= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 0))) (or (exists ((v_~p_dw_st~0_135 Int) (v_~p_dw_pc~0_47 Int)) (and (or (and (<= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483647) (= v_~p_dw_st~0_135 1) (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| 1) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483648)) (= v_~p_dw_pc~0_47 0)) (and (= v_~q_req_up~0_100 1) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483647) (<= ~q_buf_0~0 2147483647) (= v_~p_dw_st~0_135 1) (= v_~p_dw_pc~0_47 1) (<= 0 (+ ~p_last_write~0 2147483648)) (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| 1) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483648)))) (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 0)))) (= ~p_dw_st~0 0)))) (= ~q_free~0 1) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_last_read~0 ~p_last_write~0) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_15| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_15| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_15| 2147483648)) (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_15| 0)))) (= ~c_dr_st~0 1))' at error location [2023-12-02 15:13:13,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:13:13,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:13:13,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2023-12-02 15:13:13,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947058022] [2023-12-02 15:13:13,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:13:13,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-02 15:13:13,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:13:13,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-02 15:13:13,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=955, Invalid=10601, Unknown=0, NotChecked=0, Total=11556 [2023-12-02 15:13:13,649 INFO L87 Difference]: Start difference. First operand 2120 states and 2813 transitions. Second operand has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) [2023-12-02 15:13:21,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:13:21,124 INFO L93 Difference]: Finished difference Result 4325 states and 5392 transitions. [2023-12-02 15:13:21,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-12-02 15:13:21,125 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) Word has length 124 [2023-12-02 15:13:21,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:13:21,137 INFO L225 Difference]: With dead ends: 4325 [2023-12-02 15:13:21,138 INFO L226 Difference]: Without dead ends: 3254 [2023-12-02 15:13:21,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 17116 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=4300, Invalid=39172, Unknown=0, NotChecked=0, Total=43472 [2023-12-02 15:13:21,142 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 7332 mSDsluCounter, 2346 mSDsCounter, 0 mSdLazyCounter, 5513 mSolverCounterSat, 3226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7332 SdHoareTripleChecker+Valid, 2609 SdHoareTripleChecker+Invalid, 8739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3226 IncrementalHoareTripleChecker+Valid, 5513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:13:21,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7332 Valid, 2609 Invalid, 8739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3226 Valid, 5513 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-12-02 15:13:21,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3254 states. [2023-12-02 15:13:21,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3254 to 1936. [2023-12-02 15:13:21,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1490 states have (on average 1.3241610738255034) internal successors, (1973), 1506 states have internal predecessors, (1973), 263 states have call successors, (263), 159 states have call predecessors, (263), 181 states have return successors, (359), 272 states have call predecessors, (359), 262 states have call successors, (359) [2023-12-02 15:13:21,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2595 transitions. [2023-12-02 15:13:21,439 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2595 transitions. Word has length 124 [2023-12-02 15:13:21,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:13:21,440 INFO L495 AbstractCegarLoop]: Abstraction has 1936 states and 2595 transitions. [2023-12-02 15:13:21,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) [2023-12-02 15:13:21,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2595 transitions. [2023-12-02 15:13:21,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 15:13:21,442 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:13:21,442 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:13:21,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 15:13:21,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:13:21,643 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:13:21,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:13:21,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2033438568, now seen corresponding path program 1 times [2023-12-02 15:13:21,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:13:21,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031908403] [2023-12-02 15:13:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:13:21,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:13:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:13:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-02 15:13:21,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:13:21,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031908403] [2023-12-02 15:13:21,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031908403] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:13:21,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17432457] [2023-12-02 15:13:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:13:21,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:13:21,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:13:21,851 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:13:21,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 15:13:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:13:21,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 15:13:21,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:13:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 15:13:22,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:13:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 15:13:22,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17432457] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 15:13:22,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:13:22,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2023-12-02 15:13:22,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755733947] [2023-12-02 15:13:22,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:13:22,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:13:22,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:13:22,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:13:22,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-12-02 15:13:22,225 INFO L87 Difference]: Start difference. First operand 1936 states and 2595 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 15:13:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:13:23,195 INFO L93 Difference]: Finished difference Result 2591 states and 3336 transitions. [2023-12-02 15:13:23,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 15:13:23,195 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2023-12-02 15:13:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:13:23,205 INFO L225 Difference]: With dead ends: 2591 [2023-12-02 15:13:23,205 INFO L226 Difference]: Without dead ends: 1704 [2023-12-02 15:13:23,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-12-02 15:13:23,208 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 801 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:13:23,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 601 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 15:13:23,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2023-12-02 15:13:23,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1667. [2023-12-02 15:13:23,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1291 states have (on average 1.3384972889233153) internal successors, (1728), 1307 states have internal predecessors, (1728), 227 states have call successors, (227), 129 states have call predecessors, (227), 147 states have return successors, (318), 232 states have call predecessors, (318), 226 states have call successors, (318) [2023-12-02 15:13:23,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2273 transitions. [2023-12-02 15:13:23,459 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2273 transitions. Word has length 125 [2023-12-02 15:13:23,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:13:23,460 INFO L495 AbstractCegarLoop]: Abstraction has 1667 states and 2273 transitions. [2023-12-02 15:13:23,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 15:13:23,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2273 transitions. [2023-12-02 15:13:23,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 15:13:23,462 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:13:23,462 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:13:23,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 15:13:23,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:13:23,663 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:13:23,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:13:23,663 INFO L85 PathProgramCache]: Analyzing trace with hash -506851161, now seen corresponding path program 1 times [2023-12-02 15:13:23,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:13:23,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063772462] [2023-12-02 15:13:23,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:13:23,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:13:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:13:23,764 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 15:13:23,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:13:23,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063772462] [2023-12-02 15:13:23,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063772462] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:13:23,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411824655] [2023-12-02 15:13:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:13:23,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:13:23,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:13:23,766 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:13:23,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 15:13:24,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:13:24,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 15:13:24,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:13:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 15:13:24,050 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:13:24,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411824655] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:13:24,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:13:24,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 15:13:24,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228342607] [2023-12-02 15:13:24,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:13:24,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:13:24,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:13:24,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:13:24,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:13:24,051 INFO L87 Difference]: Start difference. First operand 1667 states and 2273 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 15:13:24,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:13:24,524 INFO L93 Difference]: Finished difference Result 3515 states and 5287 transitions. [2023-12-02 15:13:24,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:13:24,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2023-12-02 15:13:24,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:13:24,536 INFO L225 Difference]: With dead ends: 3515 [2023-12-02 15:13:24,536 INFO L226 Difference]: Without dead ends: 2583 [2023-12-02 15:13:24,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:13:24,540 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 355 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:13:24,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 560 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:13:24,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2023-12-02 15:13:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 2576. [2023-12-02 15:13:24,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2576 states, 2068 states have (on average 1.390715667311412) internal successors, (2876), 2087 states have internal predecessors, (2876), 329 states have call successors, (329), 159 states have call predecessors, (329), 177 states have return successors, (478), 331 states have call predecessors, (478), 328 states have call successors, (478) [2023-12-02 15:13:24,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 3683 transitions. [2023-12-02 15:13:24,900 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 3683 transitions. Word has length 137 [2023-12-02 15:13:24,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:13:24,901 INFO L495 AbstractCegarLoop]: Abstraction has 2576 states and 3683 transitions. [2023-12-02 15:13:24,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 15:13:24,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 3683 transitions. [2023-12-02 15:13:24,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 15:13:24,906 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:13:24,906 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:13:24,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 15:13:25,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:13:25,107 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:13:25,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:13:25,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1184034759, now seen corresponding path program 1 times [2023-12-02 15:13:25,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:13:25,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134364742] [2023-12-02 15:13:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:13:25,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:13:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:13:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 15:13:25,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:13:25,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134364742] [2023-12-02 15:13:25,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134364742] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:13:25,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663044934] [2023-12-02 15:13:25,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:13:25,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:13:25,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:13:25,221 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:13:25,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 15:13:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:13:25,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 15:13:25,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:13:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-02 15:13:25,447 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:13:25,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663044934] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:13:25,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:13:25,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 15:13:25,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441240181] [2023-12-02 15:13:25,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:13:25,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:13:25,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:13:25,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:13:25,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:13:25,448 INFO L87 Difference]: Start difference. First operand 2576 states and 3683 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 15:13:26,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:13:26,120 INFO L93 Difference]: Finished difference Result 6227 states and 9609 transitions. [2023-12-02 15:13:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:13:26,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2023-12-02 15:13:26,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:13:26,135 INFO L225 Difference]: With dead ends: 6227 [2023-12-02 15:13:26,136 INFO L226 Difference]: Without dead ends: 4386 [2023-12-02 15:13:26,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:13:26,143 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 358 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:13:26,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 560 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:13:26,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2023-12-02 15:13:26,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 4374. [2023-12-02 15:13:26,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4374 states, 3607 states have (on average 1.425561408372609) internal successors, (5142), 3632 states have internal predecessors, (5142), 528 states have call successors, (528), 219 states have call predecessors, (528), 237 states have return successors, (789), 524 states have call predecessors, (789), 527 states have call successors, (789) [2023-12-02 15:13:26,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4374 states to 4374 states and 6459 transitions. [2023-12-02 15:13:26,623 INFO L78 Accepts]: Start accepts. Automaton has 4374 states and 6459 transitions. Word has length 137 [2023-12-02 15:13:26,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:13:26,623 INFO L495 AbstractCegarLoop]: Abstraction has 4374 states and 6459 transitions. [2023-12-02 15:13:26,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 15:13:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4374 states and 6459 transitions. [2023-12-02 15:13:26,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 15:13:26,629 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:13:26,629 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:13:26,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 15:13:26,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:13:26,830 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:13:26,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:13:26,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1304937305, now seen corresponding path program 1 times [2023-12-02 15:13:26,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:13:26,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227076321] [2023-12-02 15:13:26,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:13:26,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:13:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:13:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 15:13:26,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:13:26,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227076321] [2023-12-02 15:13:26,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227076321] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:13:26,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427544166] [2023-12-02 15:13:26,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:13:26,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:13:26,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:13:26,928 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:13:26,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 15:13:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:13:27,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 15:13:27,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:13:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 15:13:27,206 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:13:27,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427544166] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:13:27,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:13:27,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 15:13:27,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743271395] [2023-12-02 15:13:27,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:13:27,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:13:27,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:13:27,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:13:27,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:13:27,207 INFO L87 Difference]: Start difference. First operand 4374 states and 6459 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 15:13:28,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:13:28,162 INFO L93 Difference]: Finished difference Result 11591 states and 18112 transitions. [2023-12-02 15:13:28,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:13:28,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2023-12-02 15:13:28,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:13:28,184 INFO L225 Difference]: With dead ends: 11591 [2023-12-02 15:13:28,184 INFO L226 Difference]: Without dead ends: 7952 [2023-12-02 15:13:28,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:13:28,196 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 337 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:13:28,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 560 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:13:28,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7952 states. [2023-12-02 15:13:28,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7952 to 7930. [2023-12-02 15:13:28,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7930 states, 6655 states have (on average 1.4446280991735536) internal successors, (9614), 6692 states have internal predecessors, (9614), 916 states have call successors, (916), 339 states have call predecessors, (916), 357 states have return successors, (1393), 900 states have call predecessors, (1393), 915 states have call successors, (1393) [2023-12-02 15:13:28,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7930 states to 7930 states and 11923 transitions. [2023-12-02 15:13:28,990 INFO L78 Accepts]: Start accepts. Automaton has 7930 states and 11923 transitions. Word has length 137 [2023-12-02 15:13:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:13:28,990 INFO L495 AbstractCegarLoop]: Abstraction has 7930 states and 11923 transitions. [2023-12-02 15:13:28,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 15:13:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 7930 states and 11923 transitions. [2023-12-02 15:13:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 15:13:28,999 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:13:29,000 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:13:29,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-02 15:13:29,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 15:13:29,200 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:13:29,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:13:29,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1906269241, now seen corresponding path program 1 times [2023-12-02 15:13:29,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:13:29,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024859405] [2023-12-02 15:13:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:13:29,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:13:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:13:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 15:13:29,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:13:29,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024859405] [2023-12-02 15:13:29,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024859405] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:13:29,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560217412] [2023-12-02 15:13:29,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:13:29,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:13:29,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:13:29,316 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:13:29,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 15:13:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:13:29,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 15:13:29,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:13:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 15:13:29,575 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:13:29,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560217412] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:13:29,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:13:29,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 15:13:29,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353996768] [2023-12-02 15:13:29,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:13:29,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:13:29,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:13:29,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:13:29,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:13:29,577 INFO L87 Difference]: Start difference. First operand 7930 states and 11923 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 15:13:30,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:13:30,952 INFO L93 Difference]: Finished difference Result 22199 states and 34836 transitions. [2023-12-02 15:13:30,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:13:30,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2023-12-02 15:13:30,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:13:30,998 INFO L225 Difference]: With dead ends: 22199 [2023-12-02 15:13:30,998 INFO L226 Difference]: Without dead ends: 15004 [2023-12-02 15:13:31,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:13:31,032 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 343 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:13:31,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 560 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:13:31,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15004 states. [2023-12-02 15:13:32,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15004 to 14962. [2023-12-02 15:13:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14962 states, 12691 states have (on average 1.4528405956977386) internal successors, (18438), 12752 states have internal predecessors, (18438), 1672 states have call successors, (1672), 579 states have call predecessors, (1672), 597 states have return successors, (2565), 1632 states have call predecessors, (2565), 1671 states have call successors, (2565) [2023-12-02 15:13:32,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14962 states to 14962 states and 22675 transitions. [2023-12-02 15:13:32,506 INFO L78 Accepts]: Start accepts. Automaton has 14962 states and 22675 transitions. Word has length 137 [2023-12-02 15:13:32,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:13:32,506 INFO L495 AbstractCegarLoop]: Abstraction has 14962 states and 22675 transitions. [2023-12-02 15:13:32,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 15:13:32,506 INFO L276 IsEmpty]: Start isEmpty. Operand 14962 states and 22675 transitions. [2023-12-02 15:13:32,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 15:13:32,523 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:13:32,523 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:13:32,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 15:13:32,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 15:13:32,723 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:13:32,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:13:32,724 INFO L85 PathProgramCache]: Analyzing trace with hash -349752601, now seen corresponding path program 1 times [2023-12-02 15:13:32,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:13:32,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471867494] [2023-12-02 15:13:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:13:32,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:13:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:13:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 15:13:32,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:13:32,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471867494] [2023-12-02 15:13:32,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471867494] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:13:32,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036748421] [2023-12-02 15:13:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:13:32,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:13:32,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:13:32,842 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:13:32,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 15:13:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:13:33,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 15:13:33,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:13:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 15:13:33,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:13:33,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036748421] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:13:33,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:13:33,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 15:13:33,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389454777] [2023-12-02 15:13:33,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:13:33,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:13:33,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:13:33,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:13:33,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:13:33,101 INFO L87 Difference]: Start difference. First operand 14962 states and 22675 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 15:13:35,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:13:35,722 INFO L93 Difference]: Finished difference Result 43175 states and 67720 transitions. [2023-12-02 15:13:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:13:35,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2023-12-02 15:13:35,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:13:35,828 INFO L225 Difference]: With dead ends: 43175 [2023-12-02 15:13:35,829 INFO L226 Difference]: Without dead ends: 28948 [2023-12-02 15:13:35,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:13:35,865 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 334 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:13:35,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 560 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:13:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28948 states. [2023-12-02 15:13:38,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28948 to 28866. [2023-12-02 15:13:38,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28866 states, 24643 states have (on average 1.4546118573225661) internal successors, (35846), 24752 states have internal predecessors, (35846), 3144 states have call successors, (3144), 1059 states have call predecessors, (3144), 1077 states have return successors, (4837), 3056 states have call predecessors, (4837), 3143 states have call successors, (4837) [2023-12-02 15:13:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28866 states to 28866 states and 43827 transitions. [2023-12-02 15:13:38,639 INFO L78 Accepts]: Start accepts. Automaton has 28866 states and 43827 transitions. Word has length 137 [2023-12-02 15:13:38,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:13:38,640 INFO L495 AbstractCegarLoop]: Abstraction has 28866 states and 43827 transitions. [2023-12-02 15:13:38,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 15:13:38,640 INFO L276 IsEmpty]: Start isEmpty. Operand 28866 states and 43827 transitions. [2023-12-02 15:13:38,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 15:13:38,669 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:13:38,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:13:38,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 15:13:38,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 15:13:38,870 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:13:38,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:13:38,870 INFO L85 PathProgramCache]: Analyzing trace with hash -997384249, now seen corresponding path program 1 times [2023-12-02 15:13:38,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:13:38,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381664169] [2023-12-02 15:13:38,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:13:38,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:13:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:13:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 15:13:38,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:13:38,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381664169] [2023-12-02 15:13:38,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381664169] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:13:38,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348996500] [2023-12-02 15:13:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:13:38,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:13:38,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:13:38,993 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:13:38,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 15:13:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:13:39,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 15:13:39,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:13:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 15:13:39,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:13:39,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348996500] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:13:39,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:13:39,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 15:13:39,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727727560] [2023-12-02 15:13:39,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:13:39,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:13:39,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:13:39,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:13:39,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:13:39,217 INFO L87 Difference]: Start difference. First operand 28866 states and 43827 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 15:13:44,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:13:44,287 INFO L93 Difference]: Finished difference Result 84647 states and 132360 transitions. [2023-12-02 15:13:44,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:13:44,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2023-12-02 15:13:44,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:13:44,473 INFO L225 Difference]: With dead ends: 84647 [2023-12-02 15:13:44,474 INFO L226 Difference]: Without dead ends: 56516 [2023-12-02 15:13:44,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:13:44,556 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 349 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:13:44,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 560 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:13:44,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56516 states. [2023-12-02 15:13:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56516 to 56354. [2023-12-02 15:13:49,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56354 states, 48307 states have (on average 1.4528329227648167) internal successors, (70182), 48512 states have internal predecessors, (70182), 6008 states have call successors, (6008), 2019 states have call predecessors, (6008), 2037 states have return successors, (9237), 5824 states have call predecessors, (9237), 6007 states have call successors, (9237) [2023-12-02 15:13:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56354 states to 56354 states and 85427 transitions. [2023-12-02 15:13:49,638 INFO L78 Accepts]: Start accepts. Automaton has 56354 states and 85427 transitions. Word has length 137 [2023-12-02 15:13:49,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:13:49,638 INFO L495 AbstractCegarLoop]: Abstraction has 56354 states and 85427 transitions. [2023-12-02 15:13:49,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 15:13:49,639 INFO L276 IsEmpty]: Start isEmpty. Operand 56354 states and 85427 transitions. [2023-12-02 15:13:49,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 15:13:49,679 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:13:49,680 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:13:49,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-02 15:13:49,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47733bb7-e233-439a-a2fb-d4f85931900c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 15:13:49,880 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:13:49,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:13:49,881 INFO L85 PathProgramCache]: Analyzing trace with hash 749983463, now seen corresponding path program 1 times [2023-12-02 15:13:49,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:13:49,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901060669] [2023-12-02 15:13:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:13:49,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:13:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:13:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-12-02 15:13:50,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:13:50,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901060669] [2023-12-02 15:13:50,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901060669] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:13:50,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:13:50,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:13:50,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435806796] [2023-12-02 15:13:50,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:13:50,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:13:50,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:13:50,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:13:50,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:13:50,220 INFO L87 Difference]: Start difference. First operand 56354 states and 85427 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 15:14:00,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:14:00,731 INFO L93 Difference]: Finished difference Result 179110 states and 275637 transitions. [2023-12-02 15:14:00,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:14:00,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 137 [2023-12-02 15:14:00,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:14:01,259 INFO L225 Difference]: With dead ends: 179110 [2023-12-02 15:14:01,260 INFO L226 Difference]: Without dead ends: 123492 [2023-12-02 15:14:01,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:14:01,390 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 949 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:14:01,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 1060 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:14:01,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123492 states. [2023-12-02 15:14:11,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123492 to 110050. [2023-12-02 15:14:12,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110050 states, 94515 states have (on average 1.4488070676612177) internal successors, (136934), 94912 states have internal predecessors, (136934), 11576 states have call successors, (11576), 3939 states have call predecessors, (11576), 3957 states have return successors, (17749), 11200 states have call predecessors, (17749), 11575 states have call successors, (17749) [2023-12-02 15:14:12,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110050 states to 110050 states and 166259 transitions. [2023-12-02 15:14:12,433 INFO L78 Accepts]: Start accepts. Automaton has 110050 states and 166259 transitions. Word has length 137 [2023-12-02 15:14:12,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:14:12,433 INFO L495 AbstractCegarLoop]: Abstraction has 110050 states and 166259 transitions. [2023-12-02 15:14:12,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 15:14:12,433 INFO L276 IsEmpty]: Start isEmpty. Operand 110050 states and 166259 transitions. [2023-12-02 15:14:12,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-02 15:14:12,511 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:14:12,511 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:14:12,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-12-02 15:14:12,512 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:14:12,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:14:12,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1836984350, now seen corresponding path program 1 times [2023-12-02 15:14:12,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:14:12,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119197198] [2023-12-02 15:14:12,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:14:12,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:14:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:14:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-12-02 15:14:12,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:14:12,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119197198] [2023-12-02 15:14:12,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119197198] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:14:12,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:14:12,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:14:12,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044885885] [2023-12-02 15:14:12,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:14:12,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:14:12,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:14:12,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:14:12,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:14:12,813 INFO L87 Difference]: Start difference. First operand 110050 states and 166259 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 15:14:28,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:14:28,473 INFO L93 Difference]: Finished difference Result 285062 states and 435381 transitions. [2023-12-02 15:14:28,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:14:28,473 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 139 [2023-12-02 15:14:28,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:14:29,080 INFO L225 Difference]: With dead ends: 285062 [2023-12-02 15:14:29,080 INFO L226 Difference]: Without dead ends: 175748 [2023-12-02 15:14:29,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:14:29,268 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 910 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:14:29,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 1042 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 15:14:29,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175748 states. [2023-12-02 15:14:44,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175748 to 163426. [2023-12-02 15:14:44,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163426 states, 140403 states have (on average 1.4450261034308385) internal successors, (202886), 140992 states have internal predecessors, (202886), 17144 states have call successors, (17144), 5859 states have call predecessors, (17144), 5877 states have return successors, (26261), 16576 states have call predecessors, (26261), 17143 states have call successors, (26261) [2023-12-02 15:14:45,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163426 states to 163426 states and 246291 transitions. [2023-12-02 15:14:45,508 INFO L78 Accepts]: Start accepts. Automaton has 163426 states and 246291 transitions. Word has length 139 [2023-12-02 15:14:45,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:14:45,508 INFO L495 AbstractCegarLoop]: Abstraction has 163426 states and 246291 transitions. [2023-12-02 15:14:45,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 15:14:45,508 INFO L276 IsEmpty]: Start isEmpty. Operand 163426 states and 246291 transitions. [2023-12-02 15:14:45,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-12-02 15:14:45,609 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:14:45,609 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:14:45,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-02 15:14:45,609 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:14:45,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:14:45,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1792946585, now seen corresponding path program 1 times [2023-12-02 15:14:45,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:14:45,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426998248] [2023-12-02 15:14:45,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:14:45,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:14:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:14:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-12-02 15:14:46,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:14:46,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426998248] [2023-12-02 15:14:46,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426998248] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:14:46,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:14:46,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:14:46,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964691692] [2023-12-02 15:14:46,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:14:46,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:14:46,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:14:46,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:14:46,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:14:46,073 INFO L87 Difference]: Start difference. First operand 163426 states and 246291 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 15:15:09,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:15:09,913 INFO L93 Difference]: Finished difference Result 422342 states and 643637 transitions. [2023-12-02 15:15:09,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:15:09,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 141 [2023-12-02 15:15:09,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:15:10,753 INFO L225 Difference]: With dead ends: 422342 [2023-12-02 15:15:10,753 INFO L226 Difference]: Without dead ends: 259652 [2023-12-02 15:15:11,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:15:11,152 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 908 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:15:11,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 867 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:15:11,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259652 states. [2023-12-02 15:15:36,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259652 to 242850. [2023-12-02 15:15:36,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242850 states, 208675 states have (on average 1.4409680124595663) internal successors, (300694), 209552 states have internal predecessors, (300694), 25416 states have call successors, (25416), 8739 states have call predecessors, (25416), 8757 states have return successors, (38885), 24560 states have call predecessors, (38885), 25415 states have call successors, (38885) [2023-12-02 15:15:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242850 states to 242850 states and 364995 transitions. [2023-12-02 15:15:38,315 INFO L78 Accepts]: Start accepts. Automaton has 242850 states and 364995 transitions. Word has length 141 [2023-12-02 15:15:38,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:15:38,315 INFO L495 AbstractCegarLoop]: Abstraction has 242850 states and 364995 transitions. [2023-12-02 15:15:38,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 15:15:38,315 INFO L276 IsEmpty]: Start isEmpty. Operand 242850 states and 364995 transitions. [2023-12-02 15:15:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-12-02 15:15:38,476 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:15:38,476 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:15:38,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-12-02 15:15:38,476 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:15:38,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:15:38,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1751073246, now seen corresponding path program 1 times [2023-12-02 15:15:38,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:15:38,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012558879] [2023-12-02 15:15:38,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:38,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:15:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:15:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-12-02 15:15:38,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:15:38,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012558879] [2023-12-02 15:15:38,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012558879] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:15:38,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:15:38,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:15:38,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87984797] [2023-12-02 15:15:38,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:15:38,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:15:38,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:15:38,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:15:38,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:15:38,819 INFO L87 Difference]: Start difference. First operand 242850 states and 364995 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 15:16:25,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:16:25,224 INFO L93 Difference]: Finished difference Result 763078 states and 1164053 transitions. [2023-12-02 15:16:25,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:16:25,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 143 [2023-12-02 15:16:25,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:16:27,385 INFO L225 Difference]: With dead ends: 763078 [2023-12-02 15:16:27,386 INFO L226 Difference]: Without dead ends: 520964 [2023-12-02 15:16:28,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:16:28,131 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 942 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:16:28,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 817 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:16:28,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520964 states. [2023-12-02 15:17:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520964 to 476322. [2023-12-02 15:17:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476322 states, 409651 states have (on average 1.4350703403628942) internal successors, (587878), 411392 states have internal predecessors, (587878), 49272 states have call successors, (49272), 17379 states have call predecessors, (49272), 17397 states have return successors, (75029), 47552 states have call predecessors, (75029), 49271 states have call successors, (75029) [2023-12-02 15:17:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476322 states to 476322 states and 712179 transitions. [2023-12-02 15:17:20,166 INFO L78 Accepts]: Start accepts. Automaton has 476322 states and 712179 transitions. Word has length 143 [2023-12-02 15:17:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:17:20,167 INFO L495 AbstractCegarLoop]: Abstraction has 476322 states and 712179 transitions. [2023-12-02 15:17:20,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 15:17:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 476322 states and 712179 transitions. [2023-12-02 15:17:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-02 15:17:20,511 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:17:20,511 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:17:20,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-12-02 15:17:20,511 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:17:20,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:17:20,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1390772761, now seen corresponding path program 1 times [2023-12-02 15:17:20,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:17:20,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704566757] [2023-12-02 15:17:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:17:20,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:17:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:17:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-12-02 15:17:21,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:17:21,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704566757] [2023-12-02 15:17:21,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704566757] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:17:21,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:17:21,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:17:21,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211457533] [2023-12-02 15:17:21,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:17:21,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:17:21,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:17:21,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:17:21,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:17:21,029 INFO L87 Difference]: Start difference. First operand 476322 states and 712179 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 15:18:34,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:18:34,568 INFO L93 Difference]: Finished difference Result 1223542 states and 1849781 transitions. [2023-12-02 15:18:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:18:34,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 145 [2023-12-02 15:18:34,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:18:37,530 INFO L225 Difference]: With dead ends: 1223542 [2023-12-02 15:18:37,530 INFO L226 Difference]: Without dead ends: 747956 [2023-12-02 15:18:38,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:18:38,864 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 903 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:18:38,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 1010 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:18:39,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747956 states. [2023-12-02 15:19:54,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747956 to 708354. [2023-12-02 15:19:55,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708354 states, 609187 states have (on average 1.430532824896132) internal successors, (871462), 611792 states have internal predecessors, (871462), 73128 states have call successors, (73128), 26019 states have call predecessors, (73128), 26037 states have return successors, (111173), 70544 states have call predecessors, (111173), 73127 states have call successors, (111173) [2023-12-02 15:19:59,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708354 states to 708354 states and 1055763 transitions. [2023-12-02 15:19:59,457 INFO L78 Accepts]: Start accepts. Automaton has 708354 states and 1055763 transitions. Word has length 145 [2023-12-02 15:19:59,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:19:59,458 INFO L495 AbstractCegarLoop]: Abstraction has 708354 states and 1055763 transitions. [2023-12-02 15:19:59,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 15:19:59,458 INFO L276 IsEmpty]: Start isEmpty. Operand 708354 states and 1055763 transitions. [2023-12-02 15:19:59,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-12-02 15:19:59,999 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:19:59,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 15:19:59,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-12-02 15:19:59,999 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:19:59,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:20:00,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1411314590, now seen corresponding path program 1 times [2023-12-02 15:20:00,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:20:00,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866250161] [2023-12-02 15:20:00,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:20:00,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:20:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:20:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-12-02 15:20:00,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:20:00,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866250161] [2023-12-02 15:20:00,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866250161] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:20:00,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:20:00,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:20:00,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285634500] [2023-12-02 15:20:00,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:20:00,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:20:00,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:20:00,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:20:00,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:20:00,345 INFO L87 Difference]: Start difference. First operand 708354 states and 1055763 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)