./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_e7afb651-bfa6-4c00-b589-73a00b733365/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7afb651-bfa6-4c00-b589-73a00b733365/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_e7afb651-bfa6-4c00-b589-73a00b733365/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7afb651-bfa6-4c00-b589-73a00b733365/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7afb651-bfa6-4c00-b589-73a00b733365/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_e7afb651-bfa6-4c00-b589-73a00b733365/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 ff5431a1a166986f09cf6e8d9d49f276cd283b8e2ac68f401ad73509be5780b8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:10:40,368 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:10:40,484 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7afb651-bfa6-4c00-b589-73a00b733365/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:10:40,491 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:10:40,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:10:40,531 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:10:40,532 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:10:40,533 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:10:40,534 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:10:40,539 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:10:40,539 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:10:40,540 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:10:40,540 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:10:40,542 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:10:40,543 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:10:40,543 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:10:40,544 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:10:40,544 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:10:40,545 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:10:40,545 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:10:40,546 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:10:40,546 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:10:40,548 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:10:40,548 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:10:40,548 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:10:40,549 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:10:40,549 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:10:40,550 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:10:40,550 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:10:40,551 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:10:40,552 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:10:40,552 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:10:40,553 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:10:40,553 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:10:40,553 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:10:40,553 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:10:40,554 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:10:40,554 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:10:40,554 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:10:40,554 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:10:40,555 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:10:40,555 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:10:40,555 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:10:40,556 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:10:40,556 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:10:40,556 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:10:40,557 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:10:40,557 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_e7afb651-bfa6-4c00-b589-73a00b733365/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7afb651-bfa6-4c00-b589-73a00b733365/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5431a1a166986f09cf6e8d9d49f276cd283b8e2ac68f401ad73509be5780b8 [2023-11-23 21:10:40,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:10:40,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:10:40,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:10:40,909 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:10:40,910 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:10:40,911 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7afb651-bfa6-4c00-b589-73a00b733365/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2023-11-23 21:10:44,096 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:10:44,444 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:10:44,444 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7afb651-bfa6-4c00-b589-73a00b733365/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2023-11-23 21:10:44,471 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7afb651-bfa6-4c00-b589-73a00b733365/bin/utaipan-verify-mE87zJ7Ire/data/34f37b5d7/5397aecba5944fedb80efe1533009afb/FLAGe898e1f89 [2023-11-23 21:10:44,488 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7afb651-bfa6-4c00-b589-73a00b733365/bin/utaipan-verify-mE87zJ7Ire/data/34f37b5d7/5397aecba5944fedb80efe1533009afb [2023-11-23 21:10:44,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:10:44,493 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:10:44,495 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:10:44,495 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:10:44,501 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:10:44,502 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:10:44" (1/1) ... [2023-11-23 21:10:44,504 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53a6ae49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:44, skipping insertion in model container [2023-11-23 21:10:44,504 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:10:44" (1/1) ... [2023-11-23 21:10:44,568 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:10:44,753 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_e7afb651-bfa6-4c00-b589-73a00b733365/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[913,926] [2023-11-23 21:10:44,806 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_e7afb651-bfa6-4c00-b589-73a00b733365/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[5977,5990] [2023-11-23 21:10:44,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:10:44,996 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:10:45,013 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_e7afb651-bfa6-4c00-b589-73a00b733365/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[913,926] [2023-11-23 21:10:45,044 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_e7afb651-bfa6-4c00-b589-73a00b733365/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c[5977,5990] [2023-11-23 21:10:45,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:10:45,149 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:10:45,150 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:45 WrapperNode [2023-11-23 21:10:45,150 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:10:45,151 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:10:45,152 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:10:45,152 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:10:45,161 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:45" (1/1) ... [2023-11-23 21:10:45,192 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:45" (1/1) ... [2023-11-23 21:10:45,266 INFO L138 Inliner]: procedures = 70, calls = 82, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 1031 [2023-11-23 21:10:45,267 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:10:45,268 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:10:45,268 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:10:45,269 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:10:45,281 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:45" (1/1) ... [2023-11-23 21:10:45,281 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:45" (1/1) ... [2023-11-23 21:10:45,288 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:45" (1/1) ... [2023-11-23 21:10:45,289 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:45" (1/1) ... [2023-11-23 21:10:45,313 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:45" (1/1) ... [2023-11-23 21:10:45,332 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:45" (1/1) ... [2023-11-23 21:10:45,339 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:45" (1/1) ... [2023-11-23 21:10:45,345 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:45" (1/1) ... [2023-11-23 21:10:45,354 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:10:45,355 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:10:45,355 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:10:45,355 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:10:45,357 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:45" (1/1) ... [2023-11-23 21:10:45,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:10:45,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7afb651-bfa6-4c00-b589-73a00b733365/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:10:45,412 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7afb651-bfa6-4c00-b589-73a00b733365/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:10:45,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7afb651-bfa6-4c00-b589-73a00b733365/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:10:45,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:10:45,473 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 21:10:45,474 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 21:10:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-11-23 21:10:45,475 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-11-23 21:10:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-23 21:10:45,475 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-23 21:10:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-23 21:10:45,476 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-23 21:10:45,476 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-23 21:10:45,476 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-23 21:10:45,476 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-23 21:10:45,476 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-23 21:10:45,477 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-23 21:10:45,477 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-23 21:10:45,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:10:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-23 21:10:45,479 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-23 21:10:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:10:45,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:10:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-23 21:10:45,481 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-23 21:10:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-11-23 21:10:45,481 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-11-23 21:10:45,703 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:10:45,706 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:10:46,901 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:10:47,578 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:10:47,579 INFO L309 CfgBuilder]: Removed 18 assume(true) statements. [2023-11-23 21:10:47,581 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:10:47 BoogieIcfgContainer [2023-11-23 21:10:47,582 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:10:47,585 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:10:47,585 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:10:47,588 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:10:47,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:10:44" (1/3) ... [2023-11-23 21:10:47,590 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620b5dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:10:47, skipping insertion in model container [2023-11-23 21:10:47,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:45" (2/3) ... [2023-11-23 21:10:47,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620b5dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:10:47, skipping insertion in model container [2023-11-23 21:10:47,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:10:47" (3/3) ... [2023-11-23 21:10:47,594 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2023-11-23 21:10:47,629 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:10:47,629 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 21:10:47,712 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:10:47,720 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;@7fd338ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:10:47,720 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 21:10:47,728 INFO L276 IsEmpty]: Start isEmpty. Operand has 246 states, 200 states have (on average 1.535) internal successors, (307), 207 states have internal predecessors, (307), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-23 21:10:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:10:47,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:47,741 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 21:10:47,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:47,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:47,750 INFO L85 PathProgramCache]: Analyzing trace with hash -648801726, now seen corresponding path program 1 times [2023-11-23 21:10:47,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:47,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936448152] [2023-11-23 21:10:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:47,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:48,218 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 21:10:48,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:48,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936448152] [2023-11-23 21:10:48,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936448152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:48,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:10:48,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:10:48,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777870174] [2023-11-23 21:10:48,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:48,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:10:48,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:48,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:10:48,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:10:48,268 INFO L87 Difference]: Start difference. First operand has 246 states, 200 states have (on average 1.535) internal successors, (307), 207 states have internal predecessors, (307), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) 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 21:10:48,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:48,571 INFO L93 Difference]: Finished difference Result 524 states and 794 transitions. [2023-11-23 21:10:48,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:10:48,573 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 21:10:48,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:48,587 INFO L225 Difference]: With dead ends: 524 [2023-11-23 21:10:48,588 INFO L226 Difference]: Without dead ends: 278 [2023-11-23 21:10:48,597 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 21:10:48,603 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 338 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:48,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 369 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:10:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-11-23 21:10:48,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 274. [2023-11-23 21:10:48,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 226 states have (on average 1.4778761061946903) internal successors, (334), 230 states have internal predecessors, (334), 36 states have call successors, (36), 12 states have call predecessors, (36), 10 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-23 21:10:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 402 transitions. [2023-11-23 21:10:48,710 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 402 transitions. Word has length 28 [2023-11-23 21:10:48,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:48,711 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 402 transitions. [2023-11-23 21:10:48,712 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 21:10:48,712 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 402 transitions. [2023-11-23 21:10:48,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 21:10:48,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:48,716 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 21:10:48,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:10:48,717 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:48,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:48,718 INFO L85 PathProgramCache]: Analyzing trace with hash 399779432, now seen corresponding path program 1 times [2023-11-23 21:10:48,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:48,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489027527] [2023-11-23 21:10:48,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:48,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:48,840 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 21:10:48,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:48,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489027527] [2023-11-23 21:10:48,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489027527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:48,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:10:48,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:10:48,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282038441] [2023-11-23 21:10:48,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:48,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:10:48,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:48,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:10:48,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:10:48,848 INFO L87 Difference]: Start difference. First operand 274 states and 402 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 21:10:49,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:49,014 INFO L93 Difference]: Finished difference Result 430 states and 619 transitions. [2023-11-23 21:10:49,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:10:49,015 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 21:10:49,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:49,026 INFO L225 Difference]: With dead ends: 430 [2023-11-23 21:10:49,026 INFO L226 Difference]: Without dead ends: 349 [2023-11-23 21:10:49,027 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 21:10:49,028 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 336 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:49,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 353 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:10:49,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-11-23 21:10:49,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2023-11-23 21:10:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 286 states have (on average 1.451048951048951) internal successors, (415), 290 states have internal predecessors, (415), 43 states have call successors, (43), 16 states have call predecessors, (43), 14 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-23 21:10:49,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 497 transitions. [2023-11-23 21:10:49,066 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 497 transitions. Word has length 29 [2023-11-23 21:10:49,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:49,067 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 497 transitions. [2023-11-23 21:10:49,067 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 21:10:49,067 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 497 transitions. [2023-11-23 21:10:49,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 21:10:49,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:49,070 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 21:10:49,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:10:49,070 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:49,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:49,071 INFO L85 PathProgramCache]: Analyzing trace with hash -615151790, now seen corresponding path program 1 times [2023-11-23 21:10:49,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:49,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208017714] [2023-11-23 21:10:49,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:49,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:49,137 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 21:10:49,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:49,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208017714] [2023-11-23 21:10:49,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208017714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:49,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:10:49,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:10:49,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688679755] [2023-11-23 21:10:49,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:49,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:10:49,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:49,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:10:49,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:10:49,141 INFO L87 Difference]: Start difference. First operand 345 states and 497 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 21:10:49,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:49,298 INFO L93 Difference]: Finished difference Result 585 states and 825 transitions. [2023-11-23 21:10:49,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:10:49,298 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 21:10:49,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:49,302 INFO L225 Difference]: With dead ends: 585 [2023-11-23 21:10:49,302 INFO L226 Difference]: Without dead ends: 433 [2023-11-23 21:10:49,303 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 21:10:49,308 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 46 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:49,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 597 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:10:49,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-11-23 21:10:49,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 419. [2023-11-23 21:10:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 349 states have (on average 1.4326647564469914) internal successors, (500), 355 states have internal predecessors, (500), 49 states have call successors, (49), 21 states have call predecessors, (49), 19 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-23 21:10:49,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 594 transitions. [2023-11-23 21:10:49,363 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 594 transitions. Word has length 30 [2023-11-23 21:10:49,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:49,363 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 594 transitions. [2023-11-23 21:10:49,364 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 21:10:49,364 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 594 transitions. [2023-11-23 21:10:49,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 21:10:49,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:49,369 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 21:10:49,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:10:49,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:49,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:49,370 INFO L85 PathProgramCache]: Analyzing trace with hash 256369949, now seen corresponding path program 1 times [2023-11-23 21:10:49,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:49,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980453835] [2023-11-23 21:10:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:49,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:49,506 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 21:10:49,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:49,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980453835] [2023-11-23 21:10:49,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980453835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:49,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:10:49,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:10:49,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952089547] [2023-11-23 21:10:49,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:49,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:10:49,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:49,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:10:49,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:10:49,509 INFO L87 Difference]: Start difference. First operand 419 states and 594 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 21:10:49,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:49,666 INFO L93 Difference]: Finished difference Result 582 states and 812 transitions. [2023-11-23 21:10:49,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:10:49,667 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 21:10:49,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:49,676 INFO L225 Difference]: With dead ends: 582 [2023-11-23 21:10:49,676 INFO L226 Difference]: Without dead ends: 424 [2023-11-23 21:10:49,677 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 21:10:49,688 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 32 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:49,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 631 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:10:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-11-23 21:10:49,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 413. [2023-11-23 21:10:49,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 343 states have (on average 1.4169096209912537) internal successors, (486), 349 states have internal predecessors, (486), 49 states have call successors, (49), 21 states have call predecessors, (49), 19 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-23 21:10:49,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 580 transitions. [2023-11-23 21:10:49,724 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 580 transitions. Word has length 43 [2023-11-23 21:10:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:49,725 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 580 transitions. [2023-11-23 21:10:49,725 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 21:10:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 580 transitions. [2023-11-23 21:10:49,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 21:10:49,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:49,727 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 21:10:49,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:10:49,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:49,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:49,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2100100732, now seen corresponding path program 1 times [2023-11-23 21:10:49,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:49,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722010763] [2023-11-23 21:10:49,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:49,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:49,792 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 21:10:49,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:49,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722010763] [2023-11-23 21:10:49,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722010763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:49,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:10:49,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:10:49,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049911018] [2023-11-23 21:10:49,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:49,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:10:49,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:49,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:10:49,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:10:49,795 INFO L87 Difference]: Start difference. First operand 413 states and 580 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 21:10:49,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:49,929 INFO L93 Difference]: Finished difference Result 662 states and 904 transitions. [2023-11-23 21:10:49,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:10:49,930 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 21:10:49,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:49,937 INFO L225 Difference]: With dead ends: 662 [2023-11-23 21:10:49,937 INFO L226 Difference]: Without dead ends: 459 [2023-11-23 21:10:49,938 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 21:10:49,943 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 322 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:49,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 352 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:10:49,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-11-23 21:10:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2023-11-23 21:10:49,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 382 states have (on average 1.3848167539267016) internal successors, (529), 388 states have internal predecessors, (529), 53 states have call successors, (53), 24 states have call predecessors, (53), 22 states have return successors, (49), 47 states have call predecessors, (49), 49 states have call successors, (49) [2023-11-23 21:10:49,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 631 transitions. [2023-11-23 21:10:49,983 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 631 transitions. Word has length 46 [2023-11-23 21:10:49,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:49,984 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 631 transitions. [2023-11-23 21:10:49,984 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 21:10:49,984 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 631 transitions. [2023-11-23 21:10:49,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:10:49,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:49,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:10:49,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:10:49,987 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:49,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:49,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1224508151, now seen corresponding path program 1 times [2023-11-23 21:10:49,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:49,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589601866] [2023-11-23 21:10:49,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:49,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:10:50,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:50,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589601866] [2023-11-23 21:10:50,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589601866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:50,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:10:50,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:10:50,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456143863] [2023-11-23 21:10:50,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:50,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:10:50,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:50,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:10:50,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:10:50,083 INFO L87 Difference]: Start difference. First operand 459 states and 631 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:10:50,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:50,365 INFO L93 Difference]: Finished difference Result 686 states and 931 transitions. [2023-11-23 21:10:50,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:10:50,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2023-11-23 21:10:50,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:50,371 INFO L225 Difference]: With dead ends: 686 [2023-11-23 21:10:50,371 INFO L226 Difference]: Without dead ends: 457 [2023-11-23 21:10:50,372 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 [2023-11-23 21:10:50,374 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 377 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:50,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 592 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:10:50,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2023-11-23 21:10:50,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 455. [2023-11-23 21:10:50,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 378 states have (on average 1.3571428571428572) internal successors, (513), 384 states have internal predecessors, (513), 53 states have call successors, (53), 24 states have call predecessors, (53), 22 states have return successors, (49), 47 states have call predecessors, (49), 49 states have call successors, (49) [2023-11-23 21:10:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 615 transitions. [2023-11-23 21:10:50,448 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 615 transitions. Word has length 47 [2023-11-23 21:10:50,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:50,449 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 615 transitions. [2023-11-23 21:10:50,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:10:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 615 transitions. [2023-11-23 21:10:50,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:10:50,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:50,452 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 21:10:50,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:10:50,452 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:50,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:50,453 INFO L85 PathProgramCache]: Analyzing trace with hash -351669496, now seen corresponding path program 1 times [2023-11-23 21:10:50,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:50,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602969754] [2023-11-23 21:10:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:50,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:50,550 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 21:10:50,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:50,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602969754] [2023-11-23 21:10:50,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602969754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:50,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:10:50,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:10:50,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852813164] [2023-11-23 21:10:50,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:50,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:10:50,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:50,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:10:50,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:10:50,552 INFO L87 Difference]: Start difference. First operand 455 states and 615 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 21:10:50,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:50,843 INFO L93 Difference]: Finished difference Result 491 states and 656 transitions. [2023-11-23 21:10:50,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:10:50,844 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 21:10:50,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:50,848 INFO L225 Difference]: With dead ends: 491 [2023-11-23 21:10:50,849 INFO L226 Difference]: Without dead ends: 488 [2023-11-23 21:10:50,849 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 21:10:50,850 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 584 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:50,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 346 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:10:50,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2023-11-23 21:10:50,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 454. [2023-11-23 21:10:50,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 378 states have (on average 1.3518518518518519) internal successors, (511), 383 states have internal predecessors, (511), 52 states have call successors, (52), 24 states have call predecessors, (52), 22 states have return successors, (49), 47 states have call predecessors, (49), 49 states have call successors, (49) [2023-11-23 21:10:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 612 transitions. [2023-11-23 21:10:50,902 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 612 transitions. Word has length 47 [2023-11-23 21:10:50,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:50,905 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 612 transitions. [2023-11-23 21:10:50,905 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 21:10:50,905 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 612 transitions. [2023-11-23 21:10:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-23 21:10:50,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:50,907 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 21:10:50,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:10:50,907 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:50,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:50,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1981788455, now seen corresponding path program 1 times [2023-11-23 21:10:50,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:50,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376628003] [2023-11-23 21:10:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:50,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:51,156 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 21:10:51,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:51,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376628003] [2023-11-23 21:10:51,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376628003] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:10:51,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71718317] [2023-11-23 21:10:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:51,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:10:51,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7afb651-bfa6-4c00-b589-73a00b733365/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:10:51,163 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7afb651-bfa6-4c00-b589-73a00b733365/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:10:51,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7afb651-bfa6-4c00-b589-73a00b733365/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:10:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:51,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:10:51,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:10:51,669 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 21:10:51,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:10:51,772 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 21:10:51,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71718317] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:10:51,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [242559540] [2023-11-23 21:10:51,807 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-11-23 21:10:51,807 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:10:51,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:10:51,819 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:10:51,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:11:03,899 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 171 for LOIs [2023-11-23 21:11:03,985 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 196 for LOIs [2023-11-23 21:11:04,094 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 205 for LOIs [2023-11-23 21:11:06,443 INFO L180 IcfgInterpreter]: Interpretation finished