./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ff09e-e9dd-4115-8632-2b01508f5128/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ff09e-e9dd-4115-8632-2b01508f5128/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_687ff09e-e9dd-4115-8632-2b01508f5128/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ff09e-e9dd-4115-8632-2b01508f5128/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ff09e-e9dd-4115-8632-2b01508f5128/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_687ff09e-e9dd-4115-8632-2b01508f5128/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 0becd5109c9f10d4cd495bd258560ff3ae7f6a1dd143c8dd06621d725fa7a35e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:05:40,350 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:05:40,464 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ff09e-e9dd-4115-8632-2b01508f5128/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:05:40,470 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:05:40,470 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:05:40,522 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:05:40,523 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:05:40,524 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:05:40,525 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:05:40,532 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:05:40,532 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:05:40,534 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:05:40,534 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:05:40,536 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:05:40,536 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:05:40,537 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:05:40,537 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:05:40,538 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:05:40,538 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:05:40,538 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:05:40,539 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:05:40,539 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:05:40,541 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:05:40,541 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:05:40,541 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:05:40,542 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:05:40,542 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:05:40,542 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:05:40,543 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:05:40,543 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:05:40,545 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:05:40,545 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:05:40,545 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:05:40,545 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:05:40,545 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:05:40,546 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:05:40,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:05:40,546 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:05:40,546 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:05:40,547 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:05:40,547 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:05:40,547 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:05:40,548 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:05:40,548 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:05:40,548 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:05:40,549 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_687ff09e-e9dd-4115-8632-2b01508f5128/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ff09e-e9dd-4115-8632-2b01508f5128/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0becd5109c9f10d4cd495bd258560ff3ae7f6a1dd143c8dd06621d725fa7a35e [2023-11-19 05:05:40,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:05:40,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:05:40,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:05:40,950 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:05:40,950 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:05:40,953 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ff09e-e9dd-4115-8632-2b01508f5128/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c [2023-11-19 05:05:44,103 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:05:44,370 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:05:44,371 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ff09e-e9dd-4115-8632-2b01508f5128/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c [2023-11-19 05:05:44,395 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ff09e-e9dd-4115-8632-2b01508f5128/bin/utaipan-verify-t7M7D8N6sZ/data/7c4ebe53e/ee2985600d544c02a1e3d7599439518b/FLAGa53ecc81b [2023-11-19 05:05:44,410 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ff09e-e9dd-4115-8632-2b01508f5128/bin/utaipan-verify-t7M7D8N6sZ/data/7c4ebe53e/ee2985600d544c02a1e3d7599439518b [2023-11-19 05:05:44,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:05:44,417 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:05:44,420 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:05:44,420 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:05:44,426 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:05:44,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:05:44" (1/1) ... [2023-11-19 05:05:44,431 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26bae079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:44, skipping insertion in model container [2023-11-19 05:05:44,431 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:05:44" (1/1) ... [2023-11-19 05:05:44,507 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:05:44,681 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_687ff09e-e9dd-4115-8632-2b01508f5128/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c[914,927] [2023-11-19 05:05:44,754 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_687ff09e-e9dd-4115-8632-2b01508f5128/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c[7115,7128] [2023-11-19 05:05:44,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:05:44,879 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:05:44,897 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_687ff09e-e9dd-4115-8632-2b01508f5128/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c[914,927] [2023-11-19 05:05:44,930 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_687ff09e-e9dd-4115-8632-2b01508f5128/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c[7115,7128] [2023-11-19 05:05:44,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:05:45,012 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:05:45,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:45 WrapperNode [2023-11-19 05:05:45,013 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:05:45,015 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:05:45,016 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:05:45,016 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:05:45,025 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:45" (1/1) ... [2023-11-19 05:05:45,044 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:45" (1/1) ... [2023-11-19 05:05:45,097 INFO L138 Inliner]: procedures = 65, calls = 75, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 710 [2023-11-19 05:05:45,097 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:05:45,098 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:05:45,098 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:05:45,099 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:05:45,108 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:45" (1/1) ... [2023-11-19 05:05:45,109 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:45" (1/1) ... [2023-11-19 05:05:45,113 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:45" (1/1) ... [2023-11-19 05:05:45,114 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:45" (1/1) ... [2023-11-19 05:05:45,129 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:45" (1/1) ... [2023-11-19 05:05:45,140 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:45" (1/1) ... [2023-11-19 05:05:45,144 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:45" (1/1) ... [2023-11-19 05:05:45,161 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:45" (1/1) ... [2023-11-19 05:05:45,167 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:05:45,168 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:05:45,168 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:05:45,168 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:05:45,169 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:45" (1/1) ... [2023-11-19 05:05:45,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:05:45,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ff09e-e9dd-4115-8632-2b01508f5128/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:05:45,214 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ff09e-e9dd-4115-8632-2b01508f5128/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:05:45,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ff09e-e9dd-4115-8632-2b01508f5128/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:05:45,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:05:45,264 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:05:45,264 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:05:45,266 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-19 05:05:45,267 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-19 05:05:45,268 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-19 05:05:45,268 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-19 05:05:45,268 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-19 05:05:45,268 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-19 05:05:45,268 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-19 05:05:45,269 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-19 05:05:45,269 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-19 05:05:45,269 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-19 05:05:45,269 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-19 05:05:45,269 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-19 05:05:45,270 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-19 05:05:45,270 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-19 05:05:45,271 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-19 05:05:45,271 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-19 05:05:45,272 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-19 05:05:45,272 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-19 05:05:45,272 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-19 05:05:45,273 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-19 05:05:45,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:05:45,274 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-19 05:05:45,274 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-19 05:05:45,275 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-19 05:05:45,275 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-19 05:05:45,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:05:45,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:05:45,275 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-19 05:05:45,276 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-19 05:05:45,409 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:05:45,413 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:05:46,330 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:05:46,733 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:05:46,733 INFO L302 CfgBuilder]: Removed 13 assume(true) statements. [2023-11-19 05:05:46,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:05:46 BoogieIcfgContainer [2023-11-19 05:05:46,742 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:05:46,744 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:05:46,745 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:05:46,748 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:05:46,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:05:44" (1/3) ... [2023-11-19 05:05:46,749 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0a312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:05:46, skipping insertion in model container [2023-11-19 05:05:46,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:45" (2/3) ... [2023-11-19 05:05:46,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0a312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:05:46, skipping insertion in model container [2023-11-19 05:05:46,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:05:46" (3/3) ... [2023-11-19 05:05:46,752 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.06.cil-2.c [2023-11-19 05:05:46,773 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:05:46,773 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:05:46,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:05:46,857 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;@72aa712, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:05:46,858 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:05:46,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 201 states, 150 states have (on average 1.4933333333333334) internal successors, (224), 156 states have internal predecessors, (224), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-19 05:05:46,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 05:05:46,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:46,878 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 05:05:46,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:05:46,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:46,885 INFO L85 PathProgramCache]: Analyzing trace with hash 327218810, now seen corresponding path program 1 times [2023-11-19 05:05:46,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:46,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760505790] [2023-11-19 05:05:46,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:46,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:47,351 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 05:05:47,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:47,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760505790] [2023-11-19 05:05:47,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760505790] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:05:47,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:05:47,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:05:47,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666526746] [2023-11-19 05:05:47,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:05:47,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:05:47,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:05:47,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:05:47,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:05:47,405 INFO L87 Difference]: Start difference. First operand has 201 states, 150 states have (on average 1.4933333333333334) internal successors, (224), 156 states have internal predecessors, (224), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 05:05:47,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:05:47,912 INFO L93 Difference]: Finished difference Result 453 states and 655 transitions. [2023-11-19 05:05:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:05:47,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-11-19 05:05:47,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:05:47,939 INFO L225 Difference]: With dead ends: 453 [2023-11-19 05:05:47,939 INFO L226 Difference]: Without dead ends: 256 [2023-11-19 05:05:47,953 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 05:05:47,959 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 340 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:05:47,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 494 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:05:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-11-19 05:05:48,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 249. [2023-11-19 05:05:48,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 185 states have (on average 1.3891891891891892) internal successors, (257), 189 states have internal predecessors, (257), 42 states have call successors, (42), 21 states have call predecessors, (42), 20 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-19 05:05:48,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 339 transitions. [2023-11-19 05:05:48,065 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 339 transitions. Word has length 45 [2023-11-19 05:05:48,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:05:48,066 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 339 transitions. [2023-11-19 05:05:48,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 05:05:48,066 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 339 transitions. [2023-11-19 05:05:48,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 05:05:48,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:48,073 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 05:05:48,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:05:48,074 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:05:48,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:48,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1246193433, now seen corresponding path program 1 times [2023-11-19 05:05:48,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:48,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805031734] [2023-11-19 05:05:48,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:48,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:48,319 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 05:05:48,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:48,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805031734] [2023-11-19 05:05:48,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805031734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:05:48,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:05:48,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:05:48,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479133298] [2023-11-19 05:05:48,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:05:48,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:05:48,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:05:48,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:05:48,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:05:48,332 INFO L87 Difference]: Start difference. First operand 249 states and 339 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 05:05:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:05:49,137 INFO L93 Difference]: Finished difference Result 651 states and 842 transitions. [2023-11-19 05:05:49,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:05:49,138 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 05:05:49,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:05:49,149 INFO L225 Difference]: With dead ends: 651 [2023-11-19 05:05:49,149 INFO L226 Difference]: Without dead ends: 519 [2023-11-19 05:05:49,151 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 05:05:49,154 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 730 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:05:49,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 872 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:05:49,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-11-19 05:05:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 435. [2023-11-19 05:05:49,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 317 states have (on average 1.3154574132492114) internal successors, (417), 322 states have internal predecessors, (417), 69 states have call successors, (69), 44 states have call predecessors, (69), 47 states have return successors, (71), 70 states have call predecessors, (71), 67 states have call successors, (71) [2023-11-19 05:05:49,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 557 transitions. [2023-11-19 05:05:49,243 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 557 transitions. Word has length 45 [2023-11-19 05:05:49,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:05:49,243 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 557 transitions. [2023-11-19 05:05:49,244 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 05:05:49,244 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 557 transitions. [2023-11-19 05:05:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 05:05:49,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:49,252 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 05:05:49,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:05:49,256 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:05:49,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:49,268 INFO L85 PathProgramCache]: Analyzing trace with hash 244531383, now seen corresponding path program 1 times [2023-11-19 05:05:49,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:49,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032818482] [2023-11-19 05:05:49,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:49,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:49,631 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 05:05:49,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:49,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032818482] [2023-11-19 05:05:49,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032818482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:05:49,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:05:49,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:05:49,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498521642] [2023-11-19 05:05:49,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:05:49,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:05:49,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:05:49,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:05:49,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:05:49,641 INFO L87 Difference]: Start difference. First operand 435 states and 557 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 05:05:50,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:05:50,516 INFO L93 Difference]: Finished difference Result 951 states and 1173 transitions. [2023-11-19 05:05:50,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 05:05:50,517 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 05:05:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:05:50,524 INFO L225 Difference]: With dead ends: 951 [2023-11-19 05:05:50,525 INFO L226 Difference]: Without dead ends: 649 [2023-11-19 05:05:50,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-19 05:05:50,536 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 403 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:05:50,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 837 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:05:50,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2023-11-19 05:05:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 614. [2023-11-19 05:05:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 442 states have (on average 1.2873303167420815) internal successors, (569), 448 states have internal predecessors, (569), 96 states have call successors, (96), 67 states have call predecessors, (96), 74 states have return successors, (102), 100 states have call predecessors, (102), 94 states have call successors, (102) [2023-11-19 05:05:50,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 767 transitions. [2023-11-19 05:05:50,622 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 767 transitions. Word has length 46 [2023-11-19 05:05:50,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:05:50,623 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 767 transitions. [2023-11-19 05:05:50,623 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 05:05:50,623 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 767 transitions. [2023-11-19 05:05:50,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 05:05:50,626 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:50,626 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 05:05:50,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:05:50,627 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:05:50,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:50,627 INFO L85 PathProgramCache]: Analyzing trace with hash -326496097, now seen corresponding path program 1 times [2023-11-19 05:05:50,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:50,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797083082] [2023-11-19 05:05:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:50,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:50,693 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 05:05:50,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:50,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797083082] [2023-11-19 05:05:50,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797083082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:05:50,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:05:50,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:05:50,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916811305] [2023-11-19 05:05:50,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:05:50,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:05:50,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:05:50,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:05:50,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:05:50,697 INFO L87 Difference]: Start difference. First operand 614 states and 767 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 05:05:50,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:05:50,899 INFO L93 Difference]: Finished difference Result 1178 states and 1437 transitions. [2023-11-19 05:05:50,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:05:50,900 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 05:05:50,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:05:50,908 INFO L225 Difference]: With dead ends: 1178 [2023-11-19 05:05:50,908 INFO L226 Difference]: Without dead ends: 746 [2023-11-19 05:05:50,910 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 05:05:50,915 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 67 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:05:50,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 447 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:05:50,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2023-11-19 05:05:50,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 641. [2023-11-19 05:05:50,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 465 states have (on average 1.2774193548387096) internal successors, (594), 471 states have internal predecessors, (594), 98 states have call successors, (98), 69 states have call predecessors, (98), 76 states have return successors, (104), 102 states have call predecessors, (104), 96 states have call successors, (104) [2023-11-19 05:05:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 796 transitions. [2023-11-19 05:05:51,003 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 796 transitions. Word has length 47 [2023-11-19 05:05:51,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:05:51,004 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 796 transitions. [2023-11-19 05:05:51,004 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 05:05:51,004 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 796 transitions. [2023-11-19 05:05:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 05:05:51,006 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:51,006 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] [2023-11-19 05:05:51,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:05:51,006 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:05:51,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:51,007 INFO L85 PathProgramCache]: Analyzing trace with hash 2102559173, now seen corresponding path program 1 times [2023-11-19 05:05:51,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:51,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933115094] [2023-11-19 05:05:51,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:51,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:51,120 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 05:05:51,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:51,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933115094] [2023-11-19 05:05:51,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933115094] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:05:51,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:05:51,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:05:51,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227635476] [2023-11-19 05:05:51,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:05:51,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:05:51,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:05:51,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:05:51,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:05:51,123 INFO L87 Difference]: Start difference. First operand 641 states and 796 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, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:05:51,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:05:51,886 INFO L93 Difference]: Finished difference Result 1224 states and 1708 transitions. [2023-11-19 05:05:51,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:05:51,887 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, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2023-11-19 05:05:51,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:05:51,897 INFO L225 Difference]: With dead ends: 1224 [2023-11-19 05:05:51,897 INFO L226 Difference]: Without dead ends: 1102 [2023-11-19 05:05:51,898 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 05:05:51,901 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 924 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:05:51,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 878 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:05:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2023-11-19 05:05:52,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1091. [2023-11-19 05:05:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 830 states have (on average 1.3493975903614457) internal successors, (1120), 839 states have internal predecessors, (1120), 159 states have call successors, (159), 93 states have call predecessors, (159), 100 states have return successors, (203), 160 states have call predecessors, (203), 157 states have call successors, (203) [2023-11-19 05:05:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1482 transitions. [2023-11-19 05:05:52,032 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1482 transitions. Word has length 49 [2023-11-19 05:05:52,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:05:52,033 INFO L495 AbstractCegarLoop]: Abstraction has 1091 states and 1482 transitions. [2023-11-19 05:05:52,034 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, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:05:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1482 transitions. [2023-11-19 05:05:52,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-19 05:05:52,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:52,041 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:05:52,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:05:52,041 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:05:52,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:52,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1958851964, now seen corresponding path program 1 times [2023-11-19 05:05:52,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:52,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490555471] [2023-11-19 05:05:52,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:52,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:05:52,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:52,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490555471] [2023-11-19 05:05:52,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490555471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:05:52,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:05:52,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:05:52,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942652818] [2023-11-19 05:05:52,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:05:52,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:05:52,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:05:52,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:05:52,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:05:52,147 INFO L87 Difference]: Start difference. First operand 1091 states and 1482 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:05:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:05:52,357 INFO L93 Difference]: Finished difference Result 1281 states and 1703 transitions. [2023-11-19 05:05:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:05:52,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2023-11-19 05:05:52,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:05:52,365 INFO L225 Difference]: With dead ends: 1281 [2023-11-19 05:05:52,366 INFO L226 Difference]: Without dead ends: 1008 [2023-11-19 05:05:52,367 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 05:05:52,368 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 245 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:05:52,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 302 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:05:52,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2023-11-19 05:05:52,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 899. [2023-11-19 05:05:52,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 690 states have (on average 1.3594202898550725) internal successors, (938), 697 states have internal predecessors, (938), 135 states have call successors, (135), 73 states have call predecessors, (135), 72 states have return successors, (171), 130 states have call predecessors, (171), 133 states have call successors, (171) [2023-11-19 05:05:52,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1244 transitions. [2023-11-19 05:05:52,472 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1244 transitions. Word has length 53 [2023-11-19 05:05:52,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:05:52,473 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 1244 transitions. [2023-11-19 05:05:52,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:05:52,473 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1244 transitions. [2023-11-19 05:05:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-19 05:05:52,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:52,475 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:05:52,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:05:52,476 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:05:52,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:52,476 INFO L85 PathProgramCache]: Analyzing trace with hash 223324885, now seen corresponding path program 1 times [2023-11-19 05:05:52,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:52,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062596571] [2023-11-19 05:05:52,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:52,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:05:52,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:52,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062596571] [2023-11-19 05:05:52,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062596571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:05:52,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:05:52,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:05:52,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240850226] [2023-11-19 05:05:52,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:05:52,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:05:52,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:05:52,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:05:52,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:05:52,559 INFO L87 Difference]: Start difference. First operand 899 states and 1244 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-19 05:05:52,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:05:52,946 INFO L93 Difference]: Finished difference Result 1002 states and 1360 transitions. [2023-11-19 05:05:52,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:05:52,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2023-11-19 05:05:52,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:05:52,955 INFO L225 Difference]: With dead ends: 1002 [2023-11-19 05:05:52,955 INFO L226 Difference]: Without dead ends: 999 [2023-11-19 05:05:52,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:05:52,958 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 451 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:05:52,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 273 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:05:52,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2023-11-19 05:05:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 898. [2023-11-19 05:05:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 690 states have (on average 1.355072463768116) internal successors, (935), 696 states have internal predecessors, (935), 134 states have call successors, (134), 73 states have call predecessors, (134), 72 states have return successors, (171), 130 states have call predecessors, (171), 133 states have call successors, (171) [2023-11-19 05:05:53,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1240 transitions. [2023-11-19 05:05:53,090 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1240 transitions. Word has length 54 [2023-11-19 05:05:53,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:05:53,093 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 1240 transitions. [2023-11-19 05:05:53,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-19 05:05:53,094 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1240 transitions. [2023-11-19 05:05:53,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 05:05:53,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:53,095 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:05:53,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:05:53,096 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:05:53,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:53,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1667863416, now seen corresponding path program 1 times [2023-11-19 05:05:53,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:53,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765299093] [2023-11-19 05:05:53,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:53,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:05:53,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:53,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765299093] [2023-11-19 05:05:53,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765299093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:05:53,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257708431] [2023-11-19 05:05:53,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:53,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:05:53,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ff09e-e9dd-4115-8632-2b01508f5128/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:05:53,248 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ff09e-e9dd-4115-8632-2b01508f5128/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:05:53,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_687ff09e-e9dd-4115-8632-2b01508f5128/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:05:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:53,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 05:05:53,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:05:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:05:53,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:05:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:05:53,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257708431] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:05:53,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [11885862] [2023-11-19 05:05:53,844 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-19 05:05:53,844 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:05:53,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:05:53,873 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:05:53,874 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:05:59,894 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 151 for LOIs [2023-11-19 05:05:59,981 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 147 for LOIs [2023-11-19 05:06:00,062 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 155 for LOIs [2023-11-19 05:06:01,012 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 151 for LOIs [2023-11-19 05:06:01,234 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 151 for LOIs [2023-11-19 05:06:01,403 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 151 for LOIs [2023-11-19 05:06:01,479 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 158 for LOIs [2023-11-19 05:06:01,562 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:06:19,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [11885862] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:19,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:06:19,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-11-19 05:06:19,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618428251] [2023-11-19 05:06:19,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:19,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-19 05:06:19,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:19,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-19 05:06:19,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-11-19 05:06:19,260 INFO L87 Difference]: Start difference. First operand 898 states and 1240 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)