./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/bin/utaipan-verify-mE87zJ7Ire --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 78201c5527fd684bbb5ce3426a0df19562cff65b8fe2040ac04671f6137326c6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:31:19,265 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:31:19,376 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:31:19,383 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:31:19,384 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:31:19,421 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:31:19,422 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:31:19,423 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:31:19,424 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:31:19,429 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:31:19,430 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:31:19,431 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:31:19,432 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:31:19,434 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:31:19,434 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:31:19,435 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:31:19,435 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:31:19,435 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:31:19,436 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:31:19,436 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:31:19,438 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:31:19,439 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:31:19,440 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:31:19,440 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:31:19,441 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:31:19,441 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:31:19,442 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:31:19,442 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:31:19,443 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:31:19,443 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:31:19,444 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:31:19,445 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:31:19,445 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:31:19,445 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:31:19,445 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:31:19,446 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:31:19,446 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:31:19,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:19,447 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:31:19,447 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:31:19,447 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:31:19,448 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:31:19,448 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:31:19,448 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:31:19,449 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:31:19,449 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:31:19,449 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:31:19,450 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_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78201c5527fd684bbb5ce3426a0df19562cff65b8fe2040ac04671f6137326c6 [2023-11-23 21:31:19,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:31:19,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:31:19,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:31:19,764 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:31:19,765 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:31:19,766 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c [2023-11-23 21:31:22,951 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:31:23,222 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:31:23,223 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c [2023-11-23 21:31:23,243 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/bin/utaipan-verify-mE87zJ7Ire/data/dde9eecd0/8272e25687c9472c87eb5148be65754f/FLAGb161bbf77 [2023-11-23 21:31:23,261 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/bin/utaipan-verify-mE87zJ7Ire/data/dde9eecd0/8272e25687c9472c87eb5148be65754f [2023-11-23 21:31:23,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:31:23,266 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:31:23,267 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:23,268 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:31:23,274 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:31:23,275 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:23" (1/1) ... [2023-11-23 21:31:23,276 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ce58d07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:23, skipping insertion in model container [2023-11-23 21:31:23,276 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:23" (1/1) ... [2023-11-23 21:31:23,337 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:31:23,515 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_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[913,926] [2023-11-23 21:31:23,569 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_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[5977,5990] [2023-11-23 21:31:23,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:23,699 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:31:23,712 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_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[913,926] [2023-11-23 21:31:23,734 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_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[5977,5990] [2023-11-23 21:31:23,855 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:23,901 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:31:23,901 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:23 WrapperNode [2023-11-23 21:31:23,902 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:23,903 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:23,903 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:31:23,903 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:31:23,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:23" (1/1) ... [2023-11-23 21:31:23,944 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:23" (1/1) ... [2023-11-23 21:31:24,013 INFO L138 Inliner]: procedures = 68, calls = 78, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 965 [2023-11-23 21:31:24,014 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:24,015 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:31:24,016 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:31:24,016 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:31:24,027 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:23" (1/1) ... [2023-11-23 21:31:24,028 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:23" (1/1) ... [2023-11-23 21:31:24,034 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:23" (1/1) ... [2023-11-23 21:31:24,034 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:23" (1/1) ... [2023-11-23 21:31:24,055 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:23" (1/1) ... [2023-11-23 21:31:24,071 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:23" (1/1) ... [2023-11-23 21:31:24,076 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:23" (1/1) ... [2023-11-23 21:31:24,081 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:23" (1/1) ... [2023-11-23 21:31:24,088 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:31:24,090 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:31:24,090 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:31:24,090 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:31:24,091 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:23" (1/1) ... [2023-11-23 21:31:24,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:24,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:24,153 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:31:24,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:31:24,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:31:24,244 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 21:31:24,244 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 21:31:24,245 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-11-23 21:31:24,245 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-11-23 21:31:24,245 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-23 21:31:24,246 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-23 21:31:24,246 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-23 21:31:24,246 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-23 21:31:24,246 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-23 21:31:24,247 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-23 21:31:24,247 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-23 21:31:24,247 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-23 21:31:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-23 21:31:24,248 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-23 21:31:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:31:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-23 21:31:24,250 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-23 21:31:24,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:31:24,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:31:24,251 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-23 21:31:24,251 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-23 21:31:24,480 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:31:24,483 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:31:25,590 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:31:26,162 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:31:26,162 INFO L309 CfgBuilder]: Removed 17 assume(true) statements. [2023-11-23 21:31:26,164 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:26 BoogieIcfgContainer [2023-11-23 21:31:26,164 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:31:26,167 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:31:26,167 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:31:26,170 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:31:26,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:31:23" (1/3) ... [2023-11-23 21:31:26,171 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ee5ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:26, skipping insertion in model container [2023-11-23 21:31:26,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:23" (2/3) ... [2023-11-23 21:31:26,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ee5ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:26, skipping insertion in model container [2023-11-23 21:31:26,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:26" (3/3) ... [2023-11-23 21:31:26,173 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.10.cil-2.c [2023-11-23 21:31:26,194 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:31:26,195 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 21:31:26,253 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:31:26,260 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;@7af5b136, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:31:26,260 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 21:31:26,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 228 states, 186 states have (on average 1.5268817204301075) internal successors, (284), 191 states have internal predecessors, (284), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-23 21:31:26,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:31:26,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:26,280 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] [2023-11-23 21:31:26,281 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:26,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:26,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1512312933, now seen corresponding path program 1 times [2023-11-23 21:31:26,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:26,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703254526] [2023-11-23 21:31:26,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:26,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:26,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:26,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703254526] [2023-11-23 21:31:26,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703254526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:26,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:26,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:26,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419161365] [2023-11-23 21:31:26,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:26,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:26,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:26,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:26,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:26,810 INFO L87 Difference]: Start difference. First operand has 228 states, 186 states have (on average 1.5268817204301075) internal successors, (284), 191 states have internal predecessors, (284), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:31:27,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:27,072 INFO L93 Difference]: Finished difference Result 489 states and 736 transitions. [2023-11-23 21:31:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:27,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-11-23 21:31:27,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:27,087 INFO L225 Difference]: With dead ends: 489 [2023-11-23 21:31:27,088 INFO L226 Difference]: Without dead ends: 261 [2023-11-23 21:31:27,097 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 [2023-11-23 21:31:27,102 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 311 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:27,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 346 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:27,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-23 21:31:27,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 257. [2023-11-23 21:31:27,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 212 states have (on average 1.4669811320754718) internal successors, (311), 215 states have internal predecessors, (311), 33 states have call successors, (33), 11 states have call predecessors, (33), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-23 21:31:27,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 375 transitions. [2023-11-23 21:31:27,172 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 375 transitions. Word has length 28 [2023-11-23 21:31:27,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:27,173 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 375 transitions. [2023-11-23 21:31:27,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:31:27,173 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 375 transitions. [2023-11-23 21:31:27,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 21:31:27,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:27,176 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] [2023-11-23 21:31:27,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:31:27,176 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:27,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:27,177 INFO L85 PathProgramCache]: Analyzing trace with hash -268512484, now seen corresponding path program 1 times [2023-11-23 21:31:27,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:27,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734950417] [2023-11-23 21:31:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:27,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:27,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:27,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734950417] [2023-11-23 21:31:27,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734950417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:27,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:27,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:27,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029078648] [2023-11-23 21:31:27,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:27,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:27,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:27,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:27,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:27,250 INFO L87 Difference]: Start difference. First operand 257 states and 375 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:31:27,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:27,362 INFO L93 Difference]: Finished difference Result 413 states and 592 transitions. [2023-11-23 21:31:27,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:27,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-11-23 21:31:27,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:27,367 INFO L225 Difference]: With dead ends: 413 [2023-11-23 21:31:27,367 INFO L226 Difference]: Without dead ends: 332 [2023-11-23 21:31:27,368 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 [2023-11-23 21:31:27,369 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 309 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:27,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 330 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:27,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-11-23 21:31:27,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 328. [2023-11-23 21:31:27,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 272 states have (on average 1.4411764705882353) internal successors, (392), 275 states have internal predecessors, (392), 40 states have call successors, (40), 15 states have call predecessors, (40), 14 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-23 21:31:27,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 470 transitions. [2023-11-23 21:31:27,404 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 470 transitions. Word has length 29 [2023-11-23 21:31:27,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:27,405 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 470 transitions. [2023-11-23 21:31:27,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:31:27,405 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 470 transitions. [2023-11-23 21:31:27,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 21:31:27,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:27,407 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] [2023-11-23 21:31:27,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:31:27,408 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:27,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:27,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1316775651, now seen corresponding path program 1 times [2023-11-23 21:31:27,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:27,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889379594] [2023-11-23 21:31:27,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:27,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:27,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:27,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889379594] [2023-11-23 21:31:27,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889379594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:27,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:27,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:27,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397584875] [2023-11-23 21:31:27,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:27,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:27,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:27,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:27,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:27,497 INFO L87 Difference]: Start difference. First operand 328 states and 470 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:31:27,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:27,635 INFO L93 Difference]: Finished difference Result 568 states and 798 transitions. [2023-11-23 21:31:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:27,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-11-23 21:31:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:27,640 INFO L225 Difference]: With dead ends: 568 [2023-11-23 21:31:27,640 INFO L226 Difference]: Without dead ends: 416 [2023-11-23 21:31:27,641 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 [2023-11-23 21:31:27,642 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 46 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:27,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 551 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:27,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-11-23 21:31:27,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 402. [2023-11-23 21:31:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 335 states have (on average 1.4238805970149253) internal successors, (477), 340 states have internal predecessors, (477), 46 states have call successors, (46), 20 states have call predecessors, (46), 19 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-23 21:31:27,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 567 transitions. [2023-11-23 21:31:27,679 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 567 transitions. Word has length 30 [2023-11-23 21:31:27,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:27,679 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 567 transitions. [2023-11-23 21:31:27,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:31:27,680 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 567 transitions. [2023-11-23 21:31:27,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 21:31:27,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:27,683 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:27,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:31:27,683 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:27,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash -66663801, now seen corresponding path program 1 times [2023-11-23 21:31:27,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:27,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810300966] [2023-11-23 21:31:27,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:27,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:31:27,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:27,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810300966] [2023-11-23 21:31:27,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810300966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:27,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:27,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:27,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268226270] [2023-11-23 21:31:27,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:27,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:27,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:27,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:27,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:27,844 INFO L87 Difference]: Start difference. First operand 402 states and 567 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:31:28,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:28,007 INFO L93 Difference]: Finished difference Result 565 states and 785 transitions. [2023-11-23 21:31:28,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:28,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2023-11-23 21:31:28,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:28,014 INFO L225 Difference]: With dead ends: 565 [2023-11-23 21:31:28,014 INFO L226 Difference]: Without dead ends: 407 [2023-11-23 21:31:28,015 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 [2023-11-23 21:31:28,024 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 32 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:28,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 585 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:28,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2023-11-23 21:31:28,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 396. [2023-11-23 21:31:28,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 329 states have (on average 1.4072948328267476) internal successors, (463), 334 states have internal predecessors, (463), 46 states have call successors, (46), 20 states have call predecessors, (46), 19 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-23 21:31:28,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 553 transitions. [2023-11-23 21:31:28,091 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 553 transitions. Word has length 43 [2023-11-23 21:31:28,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:28,092 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 553 transitions. [2023-11-23 21:31:28,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:31:28,093 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 553 transitions. [2023-11-23 21:31:28,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 21:31:28,104 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:28,104 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:28,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:31:28,105 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:28,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:28,106 INFO L85 PathProgramCache]: Analyzing trace with hash 786625065, now seen corresponding path program 1 times [2023-11-23 21:31:28,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:28,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692226554] [2023-11-23 21:31:28,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:28,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:31:28,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:28,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692226554] [2023-11-23 21:31:28,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692226554] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:28,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:28,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:28,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28105993] [2023-11-23 21:31:28,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:28,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:28,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:28,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:28,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:28,220 INFO L87 Difference]: Start difference. First operand 396 states and 553 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:31:28,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:28,359 INFO L93 Difference]: Finished difference Result 645 states and 877 transitions. [2023-11-23 21:31:28,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:28,360 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2023-11-23 21:31:28,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:28,364 INFO L225 Difference]: With dead ends: 645 [2023-11-23 21:31:28,364 INFO L226 Difference]: Without dead ends: 442 [2023-11-23 21:31:28,365 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 [2023-11-23 21:31:28,366 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 295 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:28,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 329 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:28,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2023-11-23 21:31:28,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2023-11-23 21:31:28,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 368 states have (on average 1.375) internal successors, (506), 373 states have internal predecessors, (506), 50 states have call successors, (50), 23 states have call predecessors, (50), 22 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-23 21:31:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 604 transitions. [2023-11-23 21:31:28,407 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 604 transitions. Word has length 46 [2023-11-23 21:31:28,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:28,408 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 604 transitions. [2023-11-23 21:31:28,408 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:31:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 604 transitions. [2023-11-23 21:31:28,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:31:28,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:28,410 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:28,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:31:28,411 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:28,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:28,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1734953128, now seen corresponding path program 1 times [2023-11-23 21:31:28,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:28,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810766825] [2023-11-23 21:31:28,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:28,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:31:28,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:28,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810766825] [2023-11-23 21:31:28,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810766825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:28,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:28,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:31:28,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23685693] [2023-11-23 21:31:28,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:28,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:31:28,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:28,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:31:28,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:31:28,517 INFO L87 Difference]: Start difference. First operand 442 states and 604 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:31:28,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:28,794 INFO L93 Difference]: Finished difference Result 482 states and 651 transitions. [2023-11-23 21:31:28,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:31:28,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2023-11-23 21:31:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:28,801 INFO L225 Difference]: With dead ends: 482 [2023-11-23 21:31:28,801 INFO L226 Difference]: Without dead ends: 479 [2023-11-23 21:31:28,802 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 [2023-11-23 21:31:28,803 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 542 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:28,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 328 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:31:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-11-23 21:31:28,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 441. [2023-11-23 21:31:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 368 states have (on average 1.3695652173913044) internal successors, (504), 372 states have internal predecessors, (504), 49 states have call successors, (49), 23 states have call predecessors, (49), 22 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-23 21:31:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 601 transitions. [2023-11-23 21:31:28,850 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 601 transitions. Word has length 47 [2023-11-23 21:31:28,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:28,851 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 601 transitions. [2023-11-23 21:31:28,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:31:28,851 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 601 transitions. [2023-11-23 21:31:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-23 21:31:28,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:28,853 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:28,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:31:28,854 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:28,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:28,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2052284852, now seen corresponding path program 1 times [2023-11-23 21:31:28,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:28,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314650515] [2023-11-23 21:31:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:28,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:31:29,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:29,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314650515] [2023-11-23 21:31:29,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314650515] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:29,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787013416] [2023-11-23 21:31:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:29,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:29,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:29,026 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:29,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e4df5f-0154-41c1-9ed7-7fc9f267fd17/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:31:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:29,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:31:29,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:29,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:31:29,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787013416] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:29,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1723632478] [2023-11-23 21:31:29,561 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-11-23 21:31:29,561 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:31:29,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:31:29,571 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:31:29,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:31:39,961 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 169 for LOIs [2023-11-23 21:31:40,057 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 186 for LOIs [2023-11-23 21:31:40,199 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 232 for LOIs [2023-11-23 21:31:45,438 INFO L180 IcfgInterpreter]: Interpretation finished