./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.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_c4329f25-9dd3-4946-ad96-46ea41e3b438/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4329f25-9dd3-4946-ad96-46ea41e3b438/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_c4329f25-9dd3-4946-ad96-46ea41e3b438/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4329f25-9dd3-4946-ad96-46ea41e3b438/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4329f25-9dd3-4946-ad96-46ea41e3b438/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_c4329f25-9dd3-4946-ad96-46ea41e3b438/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 030c097c5e5981a6b9166b6af780aa84c84c48bf3e4236dc73dc256776dad070 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:03:22,986 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:03:23,152 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4329f25-9dd3-4946-ad96-46ea41e3b438/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:03:23,160 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:03:23,161 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:03:23,204 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:03:23,204 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:03:23,205 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:03:23,206 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:03:23,209 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:03:23,209 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:03:23,210 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:03:23,210 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:03:23,211 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:03:23,214 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:03:23,214 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:03:23,215 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:03:23,215 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:03:23,216 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:03:23,216 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:03:23,216 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:03:23,217 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:03:23,218 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:03:23,219 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:03:23,219 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:03:23,219 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:03:23,220 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:03:23,220 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:03:23,221 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:03:23,221 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:03:23,222 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:03:23,222 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:03:23,222 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:03:23,223 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:03:23,223 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:03:23,223 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:03:23,223 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:03:23,224 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:03:23,224 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:03:23,224 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:03:23,224 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:03:23,225 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:03:23,225 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:03:23,225 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:03:23,226 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:03:23,226 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_c4329f25-9dd3-4946-ad96-46ea41e3b438/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4329f25-9dd3-4946-ad96-46ea41e3b438/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 030c097c5e5981a6b9166b6af780aa84c84c48bf3e4236dc73dc256776dad070 [2023-11-19 05:03:23,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:03:23,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:03:23,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:03:23,568 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:03:23,569 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:03:23,570 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4329f25-9dd3-4946-ad96-46ea41e3b438/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c [2023-11-19 05:03:26,714 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:03:27,099 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:03:27,100 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4329f25-9dd3-4946-ad96-46ea41e3b438/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c [2023-11-19 05:03:27,124 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4329f25-9dd3-4946-ad96-46ea41e3b438/bin/utaipan-verify-t7M7D8N6sZ/data/9399e9df1/7d5fa6027a0e4da4afd6b469491a363f/FLAG24d71e030 [2023-11-19 05:03:27,139 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4329f25-9dd3-4946-ad96-46ea41e3b438/bin/utaipan-verify-t7M7D8N6sZ/data/9399e9df1/7d5fa6027a0e4da4afd6b469491a363f [2023-11-19 05:03:27,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:03:27,143 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:03:27,145 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:03:27,145 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:03:27,151 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:03:27,152 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:03:27" (1/1) ... [2023-11-19 05:03:27,153 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ca731ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:27, skipping insertion in model container [2023-11-19 05:03:27,153 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:03:27" (1/1) ... [2023-11-19 05:03:27,221 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:03:27,417 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_c4329f25-9dd3-4946-ad96-46ea41e3b438/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[914,927] [2023-11-19 05:03:27,496 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_c4329f25-9dd3-4946-ad96-46ea41e3b438/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[7115,7128] [2023-11-19 05:03:27,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:03:27,697 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:03:27,711 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_c4329f25-9dd3-4946-ad96-46ea41e3b438/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[914,927] [2023-11-19 05:03:27,732 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_c4329f25-9dd3-4946-ad96-46ea41e3b438/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[7115,7128] [2023-11-19 05:03:27,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:03:27,855 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:03:27,855 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:27 WrapperNode [2023-11-19 05:03:27,855 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:03:27,857 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:03:27,857 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:03:27,857 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:03:27,863 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:27" (1/1) ... [2023-11-19 05:03:27,886 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:27" (1/1) ... [2023-11-19 05:03:27,972 INFO L138 Inliner]: procedures = 79, calls = 96, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 1130 [2023-11-19 05:03:27,979 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:03:27,980 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:03:27,980 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:03:27,980 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:03:27,992 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:27" (1/1) ... [2023-11-19 05:03:27,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:27" (1/1) ... [2023-11-19 05:03:28,000 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:27" (1/1) ... [2023-11-19 05:03:28,000 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:27" (1/1) ... [2023-11-19 05:03:28,040 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:27" (1/1) ... [2023-11-19 05:03:28,061 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:27" (1/1) ... [2023-11-19 05:03:28,066 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:27" (1/1) ... [2023-11-19 05:03:28,072 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:27" (1/1) ... [2023-11-19 05:03:28,081 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:03:28,082 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:03:28,083 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:03:28,083 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:03:28,084 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:27" (1/1) ... [2023-11-19 05:03:28,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:03:28,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4329f25-9dd3-4946-ad96-46ea41e3b438/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:03:28,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4329f25-9dd3-4946-ad96-46ea41e3b438/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:03:28,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4329f25-9dd3-4946-ad96-46ea41e3b438/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:03:28,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:03:28,228 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:03:28,228 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:03:28,231 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-19 05:03:28,231 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-19 05:03:28,231 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-19 05:03:28,231 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-19 05:03:28,232 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-19 05:03:28,232 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-19 05:03:28,232 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-19 05:03:28,232 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-19 05:03:28,232 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-19 05:03:28,232 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-19 05:03:28,233 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-19 05:03:28,233 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-19 05:03:28,233 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-19 05:03:28,234 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-19 05:03:28,235 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-19 05:03:28,235 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-19 05:03:28,235 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-19 05:03:28,235 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-19 05:03:28,235 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-19 05:03:28,236 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-19 05:03:28,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:03:28,237 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-19 05:03:28,237 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-19 05:03:28,238 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-19 05:03:28,238 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-19 05:03:28,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:03:28,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:03:28,239 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-19 05:03:28,239 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-19 05:03:28,470 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:03:28,473 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:03:29,841 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:03:30,654 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:03:30,654 INFO L302 CfgBuilder]: Removed 20 assume(true) statements. [2023-11-19 05:03:30,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:03:30 BoogieIcfgContainer [2023-11-19 05:03:30,664 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:03:30,667 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:03:30,667 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:03:30,672 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:03:30,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:03:27" (1/3) ... [2023-11-19 05:03:30,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@778676d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:03:30, skipping insertion in model container [2023-11-19 05:03:30,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:27" (2/3) ... [2023-11-19 05:03:30,676 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@778676d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:03:30, skipping insertion in model container [2023-11-19 05:03:30,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:03:30" (3/3) ... [2023-11-19 05:03:30,678 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.13.cil-2.c [2023-11-19 05:03:30,702 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:03:30,702 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:03:30,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:03:30,789 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;@6f12679c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:03:30,790 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:03:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 285 states, 227 states have (on average 1.5110132158590308) internal successors, (343), 233 states have internal predecessors, (343), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2023-11-19 05:03:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 05:03:30,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:30,810 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 05:03:30,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:30,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:30,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1179643733, now seen corresponding path program 1 times [2023-11-19 05:03:30,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:30,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118500837] [2023-11-19 05:03:30,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:30,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:31,309 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 05:03:31,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:31,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118500837] [2023-11-19 05:03:31,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118500837] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:03:31,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:03:31,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:03:31,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140820975] [2023-11-19 05:03:31,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:03:31,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:03:31,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:03:31,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:03:31,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:03:31,382 INFO L87 Difference]: Start difference. First operand has 285 states, 227 states have (on average 1.5110132158590308) internal successors, (343), 233 states have internal predecessors, (343), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) 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 05:03:31,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:03:31,983 INFO L93 Difference]: Finished difference Result 621 states and 921 transitions. [2023-11-19 05:03:31,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:03:31,986 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 05:03:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:03:32,003 INFO L225 Difference]: With dead ends: 621 [2023-11-19 05:03:32,004 INFO L226 Difference]: Without dead ends: 340 [2023-11-19 05:03:32,011 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 05:03:32,016 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 473 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:03:32,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 704 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:03:32,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-11-19 05:03:32,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 333. [2023-11-19 05:03:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 262 states have (on average 1.4351145038167938) internal successors, (376), 266 states have internal predecessors, (376), 49 states have call successors, (49), 21 states have call predecessors, (49), 20 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-19 05:03:32,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 472 transitions. [2023-11-19 05:03:32,112 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 472 transitions. Word has length 45 [2023-11-19 05:03:32,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:03:32,113 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 472 transitions. [2023-11-19 05:03:32,114 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 05:03:32,114 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 472 transitions. [2023-11-19 05:03:32,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 05:03:32,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:32,118 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 05:03:32,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:03:32,119 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:32,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:32,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2098618356, now seen corresponding path program 1 times [2023-11-19 05:03:32,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:32,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411332415] [2023-11-19 05:03:32,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:32,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:32,308 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 05:03:32,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:32,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411332415] [2023-11-19 05:03:32,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411332415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:03:32,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:03:32,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:03:32,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172115508] [2023-11-19 05:03:32,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:03:32,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:03:32,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:03:32,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:03:32,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:03:32,313 INFO L87 Difference]: Start difference. First operand 333 states and 472 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 05:03:33,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:03:33,116 INFO L93 Difference]: Finished difference Result 735 states and 975 transitions. [2023-11-19 05:03:33,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:03:33,117 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 05:03:33,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:03:33,124 INFO L225 Difference]: With dead ends: 735 [2023-11-19 05:03:33,125 INFO L226 Difference]: Without dead ends: 603 [2023-11-19 05:03:33,126 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 05:03:33,128 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 968 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:03:33,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 1180 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 05:03:33,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2023-11-19 05:03:33,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 519. [2023-11-19 05:03:33,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 394 states have (on average 1.3604060913705585) internal successors, (536), 399 states have internal predecessors, (536), 76 states have call successors, (76), 44 states have call predecessors, (76), 47 states have return successors, (78), 77 states have call predecessors, (78), 74 states have call successors, (78) [2023-11-19 05:03:33,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 690 transitions. [2023-11-19 05:03:33,193 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 690 transitions. Word has length 45 [2023-11-19 05:03:33,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:03:33,193 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 690 transitions. [2023-11-19 05:03:33,194 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 05:03:33,194 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 690 transitions. [2023-11-19 05:03:33,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 05:03:33,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:33,196 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 05:03:33,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:03:33,197 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:33,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:33,198 INFO L85 PathProgramCache]: Analyzing trace with hash -2104897042, now seen corresponding path program 1 times [2023-11-19 05:03:33,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:33,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465295677] [2023-11-19 05:03:33,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:33,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:33,565 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 05:03:33,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:33,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465295677] [2023-11-19 05:03:33,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465295677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:03:33,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:03:33,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:03:33,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978883151] [2023-11-19 05:03:33,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:03:33,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:03:33,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:03:33,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:03:33,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:03:33,569 INFO L87 Difference]: Start difference. First operand 519 states and 690 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 05:03:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:03:34,684 INFO L93 Difference]: Finished difference Result 1035 states and 1306 transitions. [2023-11-19 05:03:34,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 05:03:34,685 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 05:03:34,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:03:34,698 INFO L225 Difference]: With dead ends: 1035 [2023-11-19 05:03:34,699 INFO L226 Difference]: Without dead ends: 733 [2023-11-19 05:03:34,706 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 05:03:34,709 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 571 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:03:34,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 1066 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 05:03:34,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2023-11-19 05:03:34,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 698. [2023-11-19 05:03:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 519 states have (on average 1.325626204238921) internal successors, (688), 525 states have internal predecessors, (688), 103 states have call successors, (103), 67 states have call predecessors, (103), 74 states have return successors, (109), 107 states have call predecessors, (109), 101 states have call successors, (109) [2023-11-19 05:03:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 900 transitions. [2023-11-19 05:03:34,815 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 900 transitions. Word has length 46 [2023-11-19 05:03:34,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:03:34,817 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 900 transitions. [2023-11-19 05:03:34,817 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 05:03:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 900 transitions. [2023-11-19 05:03:34,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 05:03:34,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:34,825 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 05:03:34,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:03:34,825 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:34,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:34,826 INFO L85 PathProgramCache]: Analyzing trace with hash -144853585, now seen corresponding path program 1 times [2023-11-19 05:03:34,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:34,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233219469] [2023-11-19 05:03:34,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:34,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:34,896 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 05:03:34,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:34,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233219469] [2023-11-19 05:03:34,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233219469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:03:34,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:03:34,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:03:34,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724272190] [2023-11-19 05:03:34,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:03:34,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:03:34,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:03:34,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:03:34,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:03:34,901 INFO L87 Difference]: Start difference. First operand 698 states and 900 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 05:03:35,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:03:35,133 INFO L93 Difference]: Finished difference Result 1262 states and 1570 transitions. [2023-11-19 05:03:35,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:03:35,134 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 05:03:35,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:03:35,141 INFO L225 Difference]: With dead ends: 1262 [2023-11-19 05:03:35,141 INFO L226 Difference]: Without dead ends: 830 [2023-11-19 05:03:35,146 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 05:03:35,155 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 67 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:03:35,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 671 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:03:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2023-11-19 05:03:35,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 725. [2023-11-19 05:03:35,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 542 states have (on average 1.3154981549815499) internal successors, (713), 548 states have internal predecessors, (713), 105 states have call successors, (105), 69 states have call predecessors, (105), 76 states have return successors, (111), 109 states have call predecessors, (111), 103 states have call successors, (111) [2023-11-19 05:03:35,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 929 transitions. [2023-11-19 05:03:35,300 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 929 transitions. Word has length 47 [2023-11-19 05:03:35,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:03:35,303 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 929 transitions. [2023-11-19 05:03:35,304 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 05:03:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 929 transitions. [2023-11-19 05:03:35,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-19 05:03:35,308 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:35,309 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 05:03:35,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:03:35,309 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:35,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:35,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1942822441, now seen corresponding path program 1 times [2023-11-19 05:03:35,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:35,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889349519] [2023-11-19 05:03:35,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:35,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:35,408 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 05:03:35,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:35,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889349519] [2023-11-19 05:03:35,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889349519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:03:35,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:03:35,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:03:35,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535476196] [2023-11-19 05:03:35,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:03:35,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:03:35,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:03:35,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:03:35,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:03:35,413 INFO L87 Difference]: Start difference. First operand 725 states and 929 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 05:03:35,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:03:35,636 INFO L93 Difference]: Finished difference Result 915 states and 1150 transitions. [2023-11-19 05:03:35,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:03:35,637 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 05:03:35,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:03:35,643 INFO L225 Difference]: With dead ends: 915 [2023-11-19 05:03:35,643 INFO L226 Difference]: Without dead ends: 642 [2023-11-19 05:03:35,645 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 05:03:35,648 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 378 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:03:35,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 414 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:03:35,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2023-11-19 05:03:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 533. [2023-11-19 05:03:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 402 states have (on average 1.3208955223880596) internal successors, (531), 406 states have internal predecessors, (531), 81 states have call successors, (81), 49 states have call predecessors, (81), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-19 05:03:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 691 transitions. [2023-11-19 05:03:35,710 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 691 transitions. Word has length 53 [2023-11-19 05:03:35,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:03:35,711 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 691 transitions. [2023-11-19 05:03:35,712 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 05:03:35,713 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 691 transitions. [2023-11-19 05:03:35,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-19 05:03:35,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:35,720 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 05:03:35,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:03:35,720 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:35,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:35,723 INFO L85 PathProgramCache]: Analyzing trace with hash 820672652, now seen corresponding path program 1 times [2023-11-19 05:03:35,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:35,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141357282] [2023-11-19 05:03:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:35,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:35,866 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 05:03:35,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:35,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141357282] [2023-11-19 05:03:35,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141357282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:03:35,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:03:35,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:03:35,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758644560] [2023-11-19 05:03:35,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:03:35,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:03:35,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:03:35,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:03:35,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:03:35,870 INFO L87 Difference]: Start difference. First operand 533 states and 691 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 05:03:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:03:36,289 INFO L93 Difference]: Finished difference Result 636 states and 807 transitions. [2023-11-19 05:03:36,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:03:36,291 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 05:03:36,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:03:36,298 INFO L225 Difference]: With dead ends: 636 [2023-11-19 05:03:36,298 INFO L226 Difference]: Without dead ends: 633 [2023-11-19 05:03:36,299 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 05:03:36,300 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 689 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:03:36,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 385 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:03:36,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2023-11-19 05:03:36,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 532. [2023-11-19 05:03:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 402 states have (on average 1.3134328358208955) internal successors, (528), 405 states have internal predecessors, (528), 80 states have call successors, (80), 49 states have call predecessors, (80), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-19 05:03:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 687 transitions. [2023-11-19 05:03:36,393 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 687 transitions. Word has length 54 [2023-11-19 05:03:36,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:03:36,394 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 687 transitions. [2023-11-19 05:03:36,394 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 05:03:36,394 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 687 transitions. [2023-11-19 05:03:36,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 05:03:36,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:36,396 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 05:03:36,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:03:36,396 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:36,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:36,397 INFO L85 PathProgramCache]: Analyzing trace with hash -330472168, now seen corresponding path program 1 times [2023-11-19 05:03:36,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:36,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480049342] [2023-11-19 05:03:36,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:36,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:36,603 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 05:03:36,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:36,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480049342] [2023-11-19 05:03:36,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480049342] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:03:36,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764979764] [2023-11-19 05:03:36,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:36,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:03:36,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4329f25-9dd3-4946-ad96-46ea41e3b438/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:03:36,612 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4329f25-9dd3-4946-ad96-46ea41e3b438/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:03:36,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4329f25-9dd3-4946-ad96-46ea41e3b438/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:03:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:36,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 05:03:36,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:03:37,152 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 05:03:37,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:03:37,262 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 05:03:37,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764979764] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:03:37,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1997090792] [2023-11-19 05:03:37,295 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-19 05:03:37,295 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:03:37,300 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:03:37,306 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:03:37,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:03:48,077 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 221 for LOIs [2023-11-19 05:03:48,207 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 217 for LOIs [2023-11-19 05:03:48,326 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 225 for LOIs [2023-11-19 05:03:50,666 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 221 for LOIs [2023-11-19 05:03:51,107 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 221 for LOIs [2023-11-19 05:03:51,504 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 221 for LOIs [2023-11-19 05:03:51,630 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 228 for LOIs [2023-11-19 05:03:51,762 INFO L180 IcfgInterpreter]: Interpretation finished