./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ --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 0a12aada2256a7483e8803a0f1fb8477c858b141679e1395c89cdfba20292c4b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:02:14,826 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:02:14,958 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:02:14,967 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:02:14,968 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:02:15,019 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:02:15,021 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:02:15,022 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:02:15,023 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:02:15,031 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:02:15,032 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:02:15,032 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:02:15,033 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:02:15,035 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:02:15,035 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:02:15,036 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:02:15,036 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:02:15,037 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:02:15,037 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:02:15,038 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:02:15,039 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:02:15,041 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:02:15,042 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:02:15,043 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:02:15,043 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:02:15,044 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:02:15,044 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:02:15,045 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:02:15,045 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:02:15,046 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:02:15,047 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:02:15,048 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:02:15,048 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:02:15,048 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:02:15,049 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:02:15,049 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:02:15,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:02:15,050 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:02:15,050 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:02:15,050 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:02:15,051 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:02:15,051 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:02:15,051 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:02:15,052 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:02:15,052 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:02:15,053 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_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a12aada2256a7483e8803a0f1fb8477c858b141679e1395c89cdfba20292c4b [2023-11-19 05:02:15,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:02:15,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:02:15,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:02:15,540 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:02:15,541 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:02:15,544 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-1.c [2023-11-19 05:02:19,158 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:02:19,456 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:02:19,457 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-1.c [2023-11-19 05:02:19,478 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/data/c8d65c51e/731491f2d7ad44bd97f1f7f1e6efac2f/FLAGe67265ed9 [2023-11-19 05:02:19,496 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/data/c8d65c51e/731491f2d7ad44bd97f1f7f1e6efac2f [2023-11-19 05:02:19,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:02:19,501 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:02:19,502 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:02:19,502 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:02:19,511 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:02:19,512 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:02:19" (1/1) ... [2023-11-19 05:02:19,514 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3096b4d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:19, skipping insertion in model container [2023-11-19 05:02:19,514 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:02:19" (1/1) ... [2023-11-19 05:02:19,587 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:02:19,811 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_e9ead5c1-371c-4f38-bd42-a97d570e8c51/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-1.c[911,924] [2023-11-19 05:02:19,873 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_e9ead5c1-371c-4f38-bd42-a97d570e8c51/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-1.c[8416,8429] [2023-11-19 05:02:19,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:02:19,976 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:02:19,993 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_e9ead5c1-371c-4f38-bd42-a97d570e8c51/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-1.c[911,924] [2023-11-19 05:02:20,016 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_e9ead5c1-371c-4f38-bd42-a97d570e8c51/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-1.c[8416,8429] [2023-11-19 05:02:20,057 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:02:20,082 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:02:20,082 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:20 WrapperNode [2023-11-19 05:02:20,083 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:02:20,084 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:02:20,084 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:02:20,084 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:02:20,090 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:20" (1/1) ... [2023-11-19 05:02:20,103 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:20" (1/1) ... [2023-11-19 05:02:20,157 INFO L138 Inliner]: procedures = 67, calls = 80, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 754 [2023-11-19 05:02:20,158 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:02:20,159 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:02:20,159 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:02:20,159 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:02:20,168 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:20" (1/1) ... [2023-11-19 05:02:20,168 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:20" (1/1) ... [2023-11-19 05:02:20,174 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:20" (1/1) ... [2023-11-19 05:02:20,174 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:20" (1/1) ... [2023-11-19 05:02:20,195 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:20" (1/1) ... [2023-11-19 05:02:20,234 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:20" (1/1) ... [2023-11-19 05:02:20,238 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:20" (1/1) ... [2023-11-19 05:02:20,242 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:20" (1/1) ... [2023-11-19 05:02:20,248 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:02:20,255 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:02:20,255 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:02:20,255 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:02:20,256 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:20" (1/1) ... [2023-11-19 05:02:20,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:02:20,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:02:20,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:02:20,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:02:20,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:02:20,358 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:02:20,358 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:02:20,360 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-19 05:02:20,360 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-19 05:02:20,361 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-19 05:02:20,361 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-19 05:02:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-19 05:02:20,362 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-19 05:02:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-19 05:02:20,362 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-19 05:02:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-19 05:02:20,363 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-19 05:02:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-19 05:02:20,363 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-19 05:02:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-19 05:02:20,364 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-19 05:02:20,365 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-19 05:02:20,365 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-19 05:02:20,365 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-19 05:02:20,366 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-19 05:02:20,366 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-19 05:02:20,367 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-19 05:02:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:02:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-19 05:02:20,367 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-19 05:02:20,368 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-19 05:02:20,369 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-19 05:02:20,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:02:20,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:02:20,369 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-19 05:02:20,370 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-19 05:02:20,370 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-11-19 05:02:20,371 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-11-19 05:02:20,536 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:02:20,539 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:02:21,371 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2023-11-19 05:02:21,371 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2023-11-19 05:02:21,435 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:02:21,845 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:02:21,845 INFO L302 CfgBuilder]: Removed 13 assume(true) statements. [2023-11-19 05:02:21,852 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:02:21 BoogieIcfgContainer [2023-11-19 05:02:21,852 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:02:21,855 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:02:21,855 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:02:21,858 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:02:21,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:02:19" (1/3) ... [2023-11-19 05:02:21,860 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30495e19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:02:21, skipping insertion in model container [2023-11-19 05:02:21,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:20" (2/3) ... [2023-11-19 05:02:21,860 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30495e19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:02:21, skipping insertion in model container [2023-11-19 05:02:21,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:02:21" (3/3) ... [2023-11-19 05:02:21,862 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.06.cil-1.c [2023-11-19 05:02:21,881 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:02:21,881 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:02:21,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:02:21,945 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;@7460e2dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:02:21,945 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:02:21,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 214 states, 158 states have (on average 1.5063291139240507) internal successors, (238), 166 states have internal predecessors, (238), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-19 05:02:21,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 05:02:21,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:21,963 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] [2023-11-19 05:02:21,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:21,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:21,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1595708772, now seen corresponding path program 1 times [2023-11-19 05:02:21,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:21,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878458562] [2023-11-19 05:02:21,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:21,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:02:22,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:22,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878458562] [2023-11-19 05:02:22,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878458562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:02:22,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:02:22,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:02:22,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989647361] [2023-11-19 05:02:22,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:02:22,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:02:22,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:22,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:02:22,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:02:22,443 INFO L87 Difference]: Start difference. First operand has 214 states, 158 states have (on average 1.5063291139240507) internal successors, (238), 166 states have internal predecessors, (238), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2023-11-19 05:02:23,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:23,071 INFO L93 Difference]: Finished difference Result 550 states and 806 transitions. [2023-11-19 05:02:23,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:02:23,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 44 [2023-11-19 05:02:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:23,097 INFO L225 Difference]: With dead ends: 550 [2023-11-19 05:02:23,097 INFO L226 Difference]: Without dead ends: 337 [2023-11-19 05:02:23,105 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 [2023-11-19 05:02:23,109 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 363 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:23,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 541 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:02:23,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-11-19 05:02:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 326. [2023-11-19 05:02:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 239 states have (on average 1.4142259414225942) internal successors, (338), 244 states have internal predecessors, (338), 58 states have call successors, (58), 29 states have call predecessors, (58), 27 states have return successors, (57), 54 states have call predecessors, (57), 54 states have call successors, (57) [2023-11-19 05:02:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 453 transitions. [2023-11-19 05:02:23,232 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 453 transitions. Word has length 44 [2023-11-19 05:02:23,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:23,233 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 453 transitions. [2023-11-19 05:02:23,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2023-11-19 05:02:23,233 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 453 transitions. [2023-11-19 05:02:23,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 05:02:23,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:23,237 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] [2023-11-19 05:02:23,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:02:23,238 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:23,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:23,239 INFO L85 PathProgramCache]: Analyzing trace with hash 308691107, now seen corresponding path program 1 times [2023-11-19 05:02:23,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:23,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978454496] [2023-11-19 05:02:23,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:23,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:23,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:02:23,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:23,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978454496] [2023-11-19 05:02:23,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978454496] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:02:23,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:02:23,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:02:23,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357812742] [2023-11-19 05:02:23,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:02:23,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:02:23,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:23,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:02:23,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:02:23,435 INFO L87 Difference]: Start difference. First operand 326 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) [2023-11-19 05:02:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:24,304 INFO L93 Difference]: Finished difference Result 863 states and 1176 transitions. [2023-11-19 05:02:24,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:02:24,305 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 [2023-11-19 05:02:24,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:24,310 INFO L225 Difference]: With dead ends: 863 [2023-11-19 05:02:24,310 INFO L226 Difference]: Without dead ends: 397 [2023-11-19 05:02:24,312 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 [2023-11-19 05:02:24,314 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 808 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:24,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [816 Valid, 919 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 05:02:24,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-11-19 05:02:24,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 312. [2023-11-19 05:02:24,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 225 states have (on average 1.3555555555555556) internal successors, (305), 230 states have internal predecessors, (305), 58 states have call successors, (58), 29 states have call predecessors, (58), 27 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-19 05:02:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 417 transitions. [2023-11-19 05:02:24,354 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 417 transitions. Word has length 45 [2023-11-19 05:02:24,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:24,354 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 417 transitions. [2023-11-19 05:02:24,355 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) [2023-11-19 05:02:24,355 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 417 transitions. [2023-11-19 05:02:24,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 05:02:24,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:24,358 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] [2023-11-19 05:02:24,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:02:24,358 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:24,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:24,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1231917897, now seen corresponding path program 1 times [2023-11-19 05:02:24,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:24,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82119238] [2023-11-19 05:02:24,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:24,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:02:24,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:24,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82119238] [2023-11-19 05:02:24,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82119238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:02:24,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:02:24,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:02:24,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720989084] [2023-11-19 05:02:24,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:02:24,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:02:24,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:24,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:02:24,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:02:24,675 INFO L87 Difference]: Start difference. First operand 312 states and 417 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) [2023-11-19 05:02:25,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:25,625 INFO L93 Difference]: Finished difference Result 614 states and 785 transitions. [2023-11-19 05:02:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 05:02:25,626 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 [2023-11-19 05:02:25,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:25,630 INFO L225 Difference]: With dead ends: 614 [2023-11-19 05:02:25,630 INFO L226 Difference]: Without dead ends: 440 [2023-11-19 05:02:25,631 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 [2023-11-19 05:02:25,633 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 430 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:25,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 757 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 05:02:25,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2023-11-19 05:02:25,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 414. [2023-11-19 05:02:25,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 293 states have (on average 1.3208191126279865) internal successors, (387), 298 states have internal predecessors, (387), 78 states have call successors, (78), 43 states have call predecessors, (78), 41 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2023-11-19 05:02:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 539 transitions. [2023-11-19 05:02:25,684 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 539 transitions. Word has length 46 [2023-11-19 05:02:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:25,685 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 539 transitions. [2023-11-19 05:02:25,685 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) [2023-11-19 05:02:25,685 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 539 transitions. [2023-11-19 05:02:25,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 05:02:25,687 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:25,687 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] [2023-11-19 05:02:25,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:02:25,688 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:25,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:25,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1642258936, now seen corresponding path program 1 times [2023-11-19 05:02:25,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:25,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333071566] [2023-11-19 05:02:25,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:25,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:02:25,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:25,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333071566] [2023-11-19 05:02:25,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333071566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:02:25,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:02:25,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:02:25,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246994956] [2023-11-19 05:02:25,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:02:25,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:02:25,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:25,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:02:25,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:02:25,744 INFO L87 Difference]: Start difference. First operand 414 states and 539 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) [2023-11-19 05:02:25,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:25,905 INFO L93 Difference]: Finished difference Result 679 states and 875 transitions. [2023-11-19 05:02:25,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:02:25,906 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 [2023-11-19 05:02:25,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:25,908 INFO L225 Difference]: With dead ends: 679 [2023-11-19 05:02:25,908 INFO L226 Difference]: Without dead ends: 133 [2023-11-19 05:02:25,909 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 [2023-11-19 05:02:25,910 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 264 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:25,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 232 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:02:25,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-19 05:02:25,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2023-11-19 05:02:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 104 states have (on average 1.4615384615384615) internal successors, (152), 106 states have internal predecessors, (152), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-19 05:02:25,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 194 transitions. [2023-11-19 05:02:25,926 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 194 transitions. Word has length 47 [2023-11-19 05:02:25,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:25,927 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 194 transitions. [2023-11-19 05:02:25,927 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) [2023-11-19 05:02:25,927 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 194 transitions. [2023-11-19 05:02:25,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 05:02:25,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:25,928 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] [2023-11-19 05:02:25,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:02:25,929 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:25,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:25,929 INFO L85 PathProgramCache]: Analyzing trace with hash -157311604, now seen corresponding path program 1 times [2023-11-19 05:02:25,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:25,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420636840] [2023-11-19 05:02:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:25,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:02:26,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:26,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420636840] [2023-11-19 05:02:26,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420636840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:02:26,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:02:26,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:02:26,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187531233] [2023-11-19 05:02:26,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:02:26,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:02:26,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:26,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:02:26,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:02:26,057 INFO L87 Difference]: Start difference. First operand 133 states and 194 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:02:26,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:26,734 INFO L93 Difference]: Finished difference Result 726 states and 1122 transitions. [2023-11-19 05:02:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:02:26,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2023-11-19 05:02:26,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:26,743 INFO L225 Difference]: With dead ends: 726 [2023-11-19 05:02:26,743 INFO L226 Difference]: Without dead ends: 599 [2023-11-19 05:02:26,745 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 [2023-11-19 05:02:26,749 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 808 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:26,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 798 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:02:26,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2023-11-19 05:02:26,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 586. [2023-11-19 05:02:26,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 472 states have (on average 1.4491525423728813) internal successors, (684), 477 states have internal predecessors, (684), 83 states have call successors, (83), 31 states have call predecessors, (83), 30 states have return successors, (119), 78 states have call predecessors, (119), 81 states have call successors, (119) [2023-11-19 05:02:26,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 886 transitions. [2023-11-19 05:02:26,840 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 886 transitions. Word has length 50 [2023-11-19 05:02:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:26,844 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 886 transitions. [2023-11-19 05:02:26,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:02:26,844 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 886 transitions. [2023-11-19 05:02:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-19 05:02:26,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:26,849 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:02:26,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:02:26,850 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:26,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:26,856 INFO L85 PathProgramCache]: Analyzing trace with hash 687162190, now seen corresponding path program 1 times [2023-11-19 05:02:26,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:26,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015488110] [2023-11-19 05:02:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:26,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:02:27,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:27,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015488110] [2023-11-19 05:02:27,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015488110] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:02:27,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854534040] [2023-11-19 05:02:27,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:27,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:27,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:02:27,134 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:02:27,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:02:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:27,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:02:27,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:02:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 05:02:27,426 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:02:27,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854534040] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:02:27,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:02:27,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:02:27,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215202261] [2023-11-19 05:02:27,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:02:27,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:02:27,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:27,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:02:27,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:02:27,429 INFO L87 Difference]: Start difference. First operand 586 states and 886 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:02:27,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:27,633 INFO L93 Difference]: Finished difference Result 1730 states and 2686 transitions. [2023-11-19 05:02:27,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:02:27,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2023-11-19 05:02:27,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:27,643 INFO L225 Difference]: With dead ends: 1730 [2023-11-19 05:02:27,643 INFO L226 Difference]: Without dead ends: 1150 [2023-11-19 05:02:27,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:02:27,648 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 163 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:27,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 309 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:02:27,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2023-11-19 05:02:27,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1141. [2023-11-19 05:02:27,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 925 states have (on average 1.442162162162162) internal successors, (1334), 933 states have internal predecessors, (1334), 155 states have call successors, (155), 61 states have call predecessors, (155), 60 states have return successors, (225), 147 states have call predecessors, (225), 153 states have call successors, (225) [2023-11-19 05:02:27,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1714 transitions. [2023-11-19 05:02:27,799 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1714 transitions. Word has length 96 [2023-11-19 05:02:27,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:27,800 INFO L495 AbstractCegarLoop]: Abstraction has 1141 states and 1714 transitions. [2023-11-19 05:02:27,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:02:27,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1714 transitions. [2023-11-19 05:02:27,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-19 05:02:27,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:27,804 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:02:27,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:02:28,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:28,026 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:28,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:28,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1190499950, now seen corresponding path program 1 times [2023-11-19 05:02:28,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:28,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483112989] [2023-11-19 05:02:28,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:28,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:02:28,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:28,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483112989] [2023-11-19 05:02:28,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483112989] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:02:28,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621613732] [2023-11-19 05:02:28,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:28,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:28,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:02:28,178 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:02:28,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:02:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:28,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:02:28,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:02:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:02:28,500 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:02:28,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621613732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:02:28,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:02:28,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:02:28,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234579641] [2023-11-19 05:02:28,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:02:28,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:02:28,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:28,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:02:28,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:02:28,505 INFO L87 Difference]: Start difference. First operand 1141 states and 1714 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:02:28,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:28,924 INFO L93 Difference]: Finished difference Result 3380 states and 5208 transitions. [2023-11-19 05:02:28,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:02:28,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2023-11-19 05:02:28,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:28,943 INFO L225 Difference]: With dead ends: 3380 [2023-11-19 05:02:28,944 INFO L226 Difference]: Without dead ends: 2245 [2023-11-19 05:02:28,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:02:28,953 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 157 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:28,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 309 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:02:28,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2023-11-19 05:02:29,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2231. [2023-11-19 05:02:29,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 1816 states have (on average 1.433920704845815) internal successors, (2604), 1830 states have internal predecessors, (2604), 294 states have call successors, (294), 121 states have call predecessors, (294), 120 states have return successors, (428), 280 states have call predecessors, (428), 292 states have call successors, (428) [2023-11-19 05:02:29,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 3326 transitions. [2023-11-19 05:02:29,175 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 3326 transitions. Word has length 96 [2023-11-19 05:02:29,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:29,175 INFO L495 AbstractCegarLoop]: Abstraction has 2231 states and 3326 transitions. [2023-11-19 05:02:29,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:02:29,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 3326 transitions. [2023-11-19 05:02:29,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-19 05:02:29,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:29,187 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:02:29,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:02:29,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:29,402 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:29,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:29,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1275412082, now seen corresponding path program 1 times [2023-11-19 05:02:29,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:29,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308467457] [2023-11-19 05:02:29,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:29,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:02:29,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:29,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308467457] [2023-11-19 05:02:29,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308467457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:02:29,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515415158] [2023-11-19 05:02:29,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:29,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:29,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:02:29,574 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:02:29,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:02:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:29,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:02:29,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:02:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 05:02:29,902 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:02:29,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515415158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:02:29,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:02:29,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:02:29,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029745888] [2023-11-19 05:02:29,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:02:29,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:02:29,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:29,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:02:29,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:02:29,905 INFO L87 Difference]: Start difference. First operand 2231 states and 3326 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:02:30,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:30,381 INFO L93 Difference]: Finished difference Result 6620 states and 10111 transitions. [2023-11-19 05:02:30,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:02:30,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2023-11-19 05:02:30,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:30,428 INFO L225 Difference]: With dead ends: 6620 [2023-11-19 05:02:30,428 INFO L226 Difference]: Without dead ends: 4395 [2023-11-19 05:02:30,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:02:30,442 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 166 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:30,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 309 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:02:30,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4395 states. [2023-11-19 05:02:30,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4395 to 4371. [2023-11-19 05:02:30,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 3568 states have (on average 1.4248878923766817) internal successors, (5084), 3594 states have internal predecessors, (5084), 562 states have call successors, (562), 241 states have call predecessors, (562), 240 states have return successors, (816), 536 states have call predecessors, (816), 560 states have call successors, (816) [2023-11-19 05:02:30,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 6462 transitions. [2023-11-19 05:02:30,920 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 6462 transitions. Word has length 96 [2023-11-19 05:02:30,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:30,922 INFO L495 AbstractCegarLoop]: Abstraction has 4371 states and 6462 transitions. [2023-11-19 05:02:30,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:02:30,922 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 6462 transitions. [2023-11-19 05:02:30,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-19 05:02:30,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:30,929 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:02:30,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:02:31,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 05:02:31,143 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:31,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:31,144 INFO L85 PathProgramCache]: Analyzing trace with hash -71034258, now seen corresponding path program 1 times [2023-11-19 05:02:31,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:31,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293395073] [2023-11-19 05:02:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:31,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-19 05:02:31,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:31,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293395073] [2023-11-19 05:02:31,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293395073] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:02:31,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:02:31,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:02:31,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599268098] [2023-11-19 05:02:31,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:02:31,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:02:31,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:31,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:02:31,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:02:31,255 INFO L87 Difference]: Start difference. First operand 4371 states and 6462 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-11-19 05:02:31,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:31,775 INFO L93 Difference]: Finished difference Result 8919 states and 13453 transitions. [2023-11-19 05:02:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:02:31,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 96 [2023-11-19 05:02:31,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:31,822 INFO L225 Difference]: With dead ends: 8919 [2023-11-19 05:02:31,822 INFO L226 Difference]: Without dead ends: 5411 [2023-11-19 05:02:31,840 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 [2023-11-19 05:02:31,843 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 80 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:31,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 408 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:02:31,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2023-11-19 05:02:32,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 5043. [2023-11-19 05:02:32,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5043 states, 4208 states have (on average 1.4496197718631179) internal successors, (6100), 4234 states have internal predecessors, (6100), 578 states have call successors, (578), 257 states have call predecessors, (578), 256 states have return successors, (832), 552 states have call predecessors, (832), 576 states have call successors, (832) [2023-11-19 05:02:32,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5043 states to 5043 states and 7510 transitions. [2023-11-19 05:02:32,350 INFO L78 Accepts]: Start accepts. Automaton has 5043 states and 7510 transitions. Word has length 96 [2023-11-19 05:02:32,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:32,351 INFO L495 AbstractCegarLoop]: Abstraction has 5043 states and 7510 transitions. [2023-11-19 05:02:32,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-11-19 05:02:32,352 INFO L276 IsEmpty]: Start isEmpty. Operand 5043 states and 7510 transitions. [2023-11-19 05:02:32,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-19 05:02:32,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:32,370 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:02:32,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 05:02:32,370 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:32,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:32,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1501882662, now seen corresponding path program 1 times [2023-11-19 05:02:32,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:32,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984304404] [2023-11-19 05:02:32,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:32,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-19 05:02:32,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:32,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984304404] [2023-11-19 05:02:32,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984304404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:02:32,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:02:32,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:02:32,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837627941] [2023-11-19 05:02:32,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:02:32,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:02:32,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:32,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:02:32,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:02:32,471 INFO L87 Difference]: Start difference. First operand 5043 states and 7510 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:02:33,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:33,119 INFO L93 Difference]: Finished difference Result 14940 states and 22667 transitions. [2023-11-19 05:02:33,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:02:33,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2023-11-19 05:02:33,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:33,206 INFO L225 Difference]: With dead ends: 14940 [2023-11-19 05:02:33,206 INFO L226 Difference]: Without dead ends: 9903 [2023-11-19 05:02:33,233 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 [2023-11-19 05:02:33,234 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 158 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:33,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 311 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:02:33,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9903 states. [2023-11-19 05:02:34,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9903 to 9843. [2023-11-19 05:02:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9843 states, 8220 states have (on average 1.4369829683698296) internal successors, (11812), 8270 states have internal predecessors, (11812), 1110 states have call successors, (1110), 513 states have call predecessors, (1110), 512 states have return successors, (1588), 1060 states have call predecessors, (1588), 1108 states have call successors, (1588) [2023-11-19 05:02:34,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9843 states to 9843 states and 14510 transitions. [2023-11-19 05:02:34,288 INFO L78 Accepts]: Start accepts. Automaton has 9843 states and 14510 transitions. Word has length 129 [2023-11-19 05:02:34,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:34,290 INFO L495 AbstractCegarLoop]: Abstraction has 9843 states and 14510 transitions. [2023-11-19 05:02:34,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:02:34,291 INFO L276 IsEmpty]: Start isEmpty. Operand 9843 states and 14510 transitions. [2023-11-19 05:02:34,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-19 05:02:34,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:34,330 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:02:34,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 05:02:34,331 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:34,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:34,331 INFO L85 PathProgramCache]: Analyzing trace with hash 844902302, now seen corresponding path program 1 times [2023-11-19 05:02:34,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:34,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410029042] [2023-11-19 05:02:34,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:34,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-19 05:02:34,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:34,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410029042] [2023-11-19 05:02:34,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410029042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:02:34,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:02:34,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:02:34,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920808499] [2023-11-19 05:02:34,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:02:34,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:02:34,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:34,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:02:34,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:02:34,453 INFO L87 Difference]: Start difference. First operand 9843 states and 14510 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:02:35,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:35,783 INFO L93 Difference]: Finished difference Result 29164 states and 43751 transitions. [2023-11-19 05:02:35,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:02:35,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2023-11-19 05:02:35,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:35,895 INFO L225 Difference]: With dead ends: 29164 [2023-11-19 05:02:35,896 INFO L226 Difference]: Without dead ends: 19327 [2023-11-19 05:02:35,940 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 [2023-11-19 05:02:35,941 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 161 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:35,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 315 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:02:35,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19327 states. [2023-11-19 05:02:37,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19327 to 19211. [2023-11-19 05:02:37,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19211 states, 16052 states have (on average 1.423623224520309) internal successors, (22852), 16150 states have internal predecessors, (22852), 2134 states have call successors, (2134), 1025 states have call predecessors, (2134), 1024 states have return successors, (3028), 2036 states have call predecessors, (3028), 2132 states have call successors, (3028) [2023-11-19 05:02:37,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19211 states to 19211 states and 28014 transitions. [2023-11-19 05:02:37,823 INFO L78 Accepts]: Start accepts. Automaton has 19211 states and 28014 transitions. Word has length 129 [2023-11-19 05:02:37,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:37,824 INFO L495 AbstractCegarLoop]: Abstraction has 19211 states and 28014 transitions. [2023-11-19 05:02:37,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:02:37,825 INFO L276 IsEmpty]: Start isEmpty. Operand 19211 states and 28014 transitions. [2023-11-19 05:02:37,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-19 05:02:37,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:37,919 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 05:02:37,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 05:02:37,920 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:37,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:37,921 INFO L85 PathProgramCache]: Analyzing trace with hash -650195483, now seen corresponding path program 1 times [2023-11-19 05:02:37,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:37,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130029332] [2023-11-19 05:02:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:37,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-19 05:02:38,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:38,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130029332] [2023-11-19 05:02:38,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130029332] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:02:38,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907109899] [2023-11-19 05:02:38,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:38,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:38,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:02:38,528 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:02:38,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:02:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:38,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:02:38,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:02:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 05:02:38,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:02:38,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907109899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:02:38,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:02:38,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:02:38,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96646462] [2023-11-19 05:02:38,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:02:38,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:02:38,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:38,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:02:38,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:02:38,794 INFO L87 Difference]: Start difference. First operand 19211 states and 28014 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:02:40,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:40,367 INFO L93 Difference]: Finished difference Result 35208 states and 51381 transitions. [2023-11-19 05:02:40,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:02:40,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 150 [2023-11-19 05:02:40,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:40,496 INFO L225 Difference]: With dead ends: 35208 [2023-11-19 05:02:40,496 INFO L226 Difference]: Without dead ends: 23892 [2023-11-19 05:02:40,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:02:40,543 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 167 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:40,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 221 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:02:40,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23892 states. [2023-11-19 05:02:42,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23892 to 23892. [2023-11-19 05:02:42,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23892 states, 20258 states have (on average 1.3877974133675586) internal successors, (28114), 20356 states have internal predecessors, (28114), 2291 states have call successors, (2291), 1342 states have call predecessors, (2291), 1342 states have return successors, (3311), 2194 states have call predecessors, (3311), 2289 states have call successors, (3311) [2023-11-19 05:02:42,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23892 states to 23892 states and 33716 transitions. [2023-11-19 05:02:42,678 INFO L78 Accepts]: Start accepts. Automaton has 23892 states and 33716 transitions. Word has length 150 [2023-11-19 05:02:42,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:42,679 INFO L495 AbstractCegarLoop]: Abstraction has 23892 states and 33716 transitions. [2023-11-19 05:02:42,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:02:42,680 INFO L276 IsEmpty]: Start isEmpty. Operand 23892 states and 33716 transitions. [2023-11-19 05:02:42,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-19 05:02:42,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:42,767 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 05:02:42,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:02:42,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 05:02:42,982 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:42,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:42,984 INFO L85 PathProgramCache]: Analyzing trace with hash 475064486, now seen corresponding path program 2 times [2023-11-19 05:02:42,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:42,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707384106] [2023-11-19 05:02:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:42,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-19 05:02:43,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:43,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707384106] [2023-11-19 05:02:43,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707384106] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:02:43,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053556412] [2023-11-19 05:02:43,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:02:43,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:43,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:02:43,597 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:02:43,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:02:43,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 05:02:43,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:02:43,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:02:43,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:02:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:02:43,987 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:02:43,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053556412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:02:43,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:02:43,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-19 05:02:43,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319871397] [2023-11-19 05:02:43,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:02:43,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:02:43,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:43,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:02:43,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:02:43,991 INFO L87 Difference]: Start difference. First operand 23892 states and 33716 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-19 05:02:47,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:47,330 INFO L93 Difference]: Finished difference Result 70822 states and 99901 transitions. [2023-11-19 05:02:47,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:02:47,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 150 [2023-11-19 05:02:47,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:47,558 INFO L225 Difference]: With dead ends: 70822 [2023-11-19 05:02:47,559 INFO L226 Difference]: Without dead ends: 46937 [2023-11-19 05:02:47,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:02:47,614 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 153 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:47,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 763 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:02:47,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46937 states. [2023-11-19 05:02:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46937 to 46805. [2023-11-19 05:02:50,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46805 states, 39613 states have (on average 1.376442077095903) internal successors, (54525), 39807 states have internal predecessors, (54525), 4510 states have call successors, (4510), 2681 states have call predecessors, (4510), 2681 states have return successors, (6806), 4317 states have call predecessors, (6806), 4508 states have call successors, (6806) [2023-11-19 05:02:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46805 states to 46805 states and 65841 transitions. [2023-11-19 05:02:51,229 INFO L78 Accepts]: Start accepts. Automaton has 46805 states and 65841 transitions. Word has length 150 [2023-11-19 05:02:51,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:51,230 INFO L495 AbstractCegarLoop]: Abstraction has 46805 states and 65841 transitions. [2023-11-19 05:02:51,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-19 05:02:51,230 INFO L276 IsEmpty]: Start isEmpty. Operand 46805 states and 65841 transitions. [2023-11-19 05:02:51,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-19 05:02:51,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:51,362 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 05:02:51,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:02:51,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 05:02:51,582 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:51,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:51,583 INFO L85 PathProgramCache]: Analyzing trace with hash 554182341, now seen corresponding path program 1 times [2023-11-19 05:02:51,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:51,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323215599] [2023-11-19 05:02:51,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:51,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-19 05:02:52,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:52,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323215599] [2023-11-19 05:02:52,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323215599] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:02:52,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013196106] [2023-11-19 05:02:52,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:52,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:52,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:02:52,081 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:02:52,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9ead5c1-371c-4f38-bd42-a97d570e8c51/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:02:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:52,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:02:52,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:02:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:02:52,412 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:02:52,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013196106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:02:52,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:02:52,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:02:52,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478445747] [2023-11-19 05:02:52,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:02:52,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:02:52,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:52,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:02:52,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:02:52,416 INFO L87 Difference]: Start difference. First operand 46805 states and 65841 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:02:55,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:55,943 INFO L93 Difference]: Finished difference Result 94373 states and 136111 transitions. [2023-11-19 05:02:55,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:02:55,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 150 [2023-11-19 05:02:55,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:56,296 INFO L225 Difference]: With dead ends: 94373 [2023-11-19 05:02:56,297 INFO L226 Difference]: Without dead ends: 66667 [2023-11-19 05:02:56,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:02:56,393 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 161 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:56,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 444 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:02:56,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66667 states.