./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 58ba472d0eab58f0bee7768d9e5b3bb2a3404d90b32bd7c010fe277536e64fd4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:21:10,709 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:21:10,829 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:21:10,837 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:21:10,838 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:21:10,879 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:21:10,881 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:21:10,882 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:21:10,883 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:21:10,888 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:21:10,889 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:21:10,890 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:21:10,891 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:21:10,893 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:21:10,893 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:21:10,893 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:21:10,894 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:21:10,894 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:21:10,895 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:21:10,895 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:21:10,896 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:21:10,896 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:21:10,898 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:21:10,898 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:21:10,899 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:21:10,899 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:21:10,899 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:21:10,900 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:21:10,900 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:21:10,901 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:21:10,902 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:21:10,902 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:21:10,903 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:21:10,903 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:21:10,903 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:21:10,904 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:21:10,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:21:10,917 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:21:10,917 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:21:10,917 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:21:10,918 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:21:10,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:21:10,918 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:21:10,918 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:21:10,919 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:21:10,919 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_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58ba472d0eab58f0bee7768d9e5b3bb2a3404d90b32bd7c010fe277536e64fd4 [2023-11-19 05:21:11,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:21:11,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:21:11,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:21:11,285 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:21:11,287 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:21:11,289 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c [2023-11-19 05:21:14,363 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:21:15,197 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:21:15,198 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c [2023-11-19 05:21:15,268 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/data/cf227616b/efc116435581457ebfb7983e9fabe085/FLAG3b053ce4e [2023-11-19 05:21:15,283 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/data/cf227616b/efc116435581457ebfb7983e9fabe085 [2023-11-19 05:21:15,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:21:15,287 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:21:15,289 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:21:15,289 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:21:15,295 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:21:15,296 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:21:15" (1/1) ... [2023-11-19 05:21:15,297 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@161513e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:15, skipping insertion in model container [2023-11-19 05:21:15,297 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:21:15" (1/1) ... [2023-11-19 05:21:15,631 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:21:18,227 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_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c[381679,381692] [2023-11-19 05:21:18,254 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_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c[383339,383352] [2023-11-19 05:21:18,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:21:18,577 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:21:19,845 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_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c[381679,381692] [2023-11-19 05:21:19,854 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_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c[383339,383352] [2023-11-19 05:21:19,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:21:19,988 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:21:19,989 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:19 WrapperNode [2023-11-19 05:21:19,989 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:21:19,991 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:21:19,991 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:21:19,991 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:21:20,000 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:19" (1/1) ... [2023-11-19 05:21:20,115 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:19" (1/1) ... [2023-11-19 05:21:20,570 INFO L138 Inliner]: procedures = 66, calls = 75, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 13174 [2023-11-19 05:21:20,570 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:21:20,571 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:21:20,571 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:21:20,571 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:21:20,581 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:19" (1/1) ... [2023-11-19 05:21:20,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:19" (1/1) ... [2023-11-19 05:21:20,647 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:19" (1/1) ... [2023-11-19 05:21:20,648 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:19" (1/1) ... [2023-11-19 05:21:20,946 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:19" (1/1) ... [2023-11-19 05:21:21,052 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:19" (1/1) ... [2023-11-19 05:21:21,125 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:19" (1/1) ... [2023-11-19 05:21:21,152 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:19" (1/1) ... [2023-11-19 05:21:21,328 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:21:21,330 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:21:21,331 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:21:21,331 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:21:21,332 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:19" (1/1) ... [2023-11-19 05:21:21,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:21:21,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:21,391 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:21:21,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:21:21,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:21:21,522 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-19 05:21:21,522 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-19 05:21:21,524 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:21:21,525 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:21:21,525 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-19 05:21:21,525 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-19 05:21:21,525 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-19 05:21:21,526 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-19 05:21:21,526 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-19 05:21:21,526 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-19 05:21:21,526 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-19 05:21:21,526 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-19 05:21:21,527 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-19 05:21:21,527 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-19 05:21:21,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:21:21,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:21:21,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:21:21,787 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:21:21,802 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:21:31,609 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:21:34,687 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:21:34,688 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-11-19 05:21:34,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:21:34 BoogieIcfgContainer [2023-11-19 05:21:34,712 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:21:34,715 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:21:34,716 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:21:34,720 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:21:34,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:21:15" (1/3) ... [2023-11-19 05:21:34,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6252102e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:21:34, skipping insertion in model container [2023-11-19 05:21:34,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:19" (2/3) ... [2023-11-19 05:21:34,723 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6252102e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:21:34, skipping insertion in model container [2023-11-19 05:21:34,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:21:34" (3/3) ... [2023-11-19 05:21:34,725 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.11.cil-1.c [2023-11-19 05:21:34,747 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:21:34,747 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:21:34,867 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:21:34,874 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;@75874493, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:21:34,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:21:34,889 INFO L276 IsEmpty]: Start isEmpty. Operand has 1838 states, 1801 states have (on average 1.951693503609106) internal successors, (3515), 1806 states have internal predecessors, (3515), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-19 05:21:34,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-19 05:21:34,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:34,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:34,910 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:34,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:34,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1404501991, now seen corresponding path program 1 times [2023-11-19 05:21:34,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:34,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655780519] [2023-11-19 05:21:34,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:34,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:21:35,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:35,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655780519] [2023-11-19 05:21:35,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655780519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:35,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:35,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:21:35,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345194348] [2023-11-19 05:21:35,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:35,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:21:35,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:35,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:21:35,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:21:35,670 INFO L87 Difference]: Start difference. First operand has 1838 states, 1801 states have (on average 1.951693503609106) internal successors, (3515), 1806 states have internal predecessors, (3515), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:21:36,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:36,888 INFO L93 Difference]: Finished difference Result 3847 states and 7427 transitions. [2023-11-19 05:21:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:21:36,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2023-11-19 05:21:36,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:36,918 INFO L225 Difference]: With dead ends: 3847 [2023-11-19 05:21:36,918 INFO L226 Difference]: Without dead ends: 2008 [2023-11-19 05:21:36,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:21:36,931 INFO L413 NwaCegarLoop]: 3512 mSDtfsCounter, 3778 mSDsluCounter, 3416 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3778 SdHoareTripleChecker+Valid, 6928 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:36,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3778 Valid, 6928 Invalid, 728 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 05:21:36,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2023-11-19 05:21:37,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 2007. [2023-11-19 05:21:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 1945 states have (on average 1.9115681233933162) internal successors, (3718), 1949 states have internal predecessors, (3718), 48 states have call successors, (48), 13 states have call predecessors, (48), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-19 05:21:37,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 3812 transitions. [2023-11-19 05:21:37,102 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 3812 transitions. Word has length 65 [2023-11-19 05:21:37,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:37,103 INFO L495 AbstractCegarLoop]: Abstraction has 2007 states and 3812 transitions. [2023-11-19 05:21:37,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:21:37,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 3812 transitions. [2023-11-19 05:21:37,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-19 05:21:37,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:37,123 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:37,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:21:37,124 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:37,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:37,125 INFO L85 PathProgramCache]: Analyzing trace with hash -101795101, now seen corresponding path program 1 times [2023-11-19 05:21:37,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:37,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224911377] [2023-11-19 05:21:37,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:37,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:21:37,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:37,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224911377] [2023-11-19 05:21:37,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224911377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:21:37,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805972128] [2023-11-19 05:21:37,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:37,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:37,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:37,635 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:21:37,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:21:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:37,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:21:38,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 05:21:38,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:21:38,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805972128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:38,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:21:38,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:21:38,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277150347] [2023-11-19 05:21:38,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:38,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:38,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:38,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:38,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:21:38,139 INFO L87 Difference]: Start difference. First operand 2007 states and 3812 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:21:38,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:38,767 INFO L93 Difference]: Finished difference Result 2722 states and 4901 transitions. [2023-11-19 05:21:38,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:38,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 131 [2023-11-19 05:21:38,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:38,788 INFO L225 Difference]: With dead ends: 2722 [2023-11-19 05:21:38,788 INFO L226 Difference]: Without dead ends: 2361 [2023-11-19 05:21:38,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:21:38,793 INFO L413 NwaCegarLoop]: 3351 mSDtfsCounter, 3509 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 3580 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:38,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3509 Valid, 3580 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:21:38,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2023-11-19 05:21:38,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2355. [2023-11-19 05:21:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2241 states have (on average 1.853190539937528) internal successors, (4153), 2246 states have internal predecessors, (4153), 88 states have call successors, (88), 25 states have call predecessors, (88), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-19 05:21:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 4327 transitions. [2023-11-19 05:21:38,919 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 4327 transitions. Word has length 131 [2023-11-19 05:21:38,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:38,919 INFO L495 AbstractCegarLoop]: Abstraction has 2355 states and 4327 transitions. [2023-11-19 05:21:38,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:21:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 4327 transitions. [2023-11-19 05:21:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-19 05:21:38,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:38,925 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:38,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:21:39,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 05:21:39,140 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:39,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:39,141 INFO L85 PathProgramCache]: Analyzing trace with hash 58461477, now seen corresponding path program 1 times [2023-11-19 05:21:39,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:39,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622441812] [2023-11-19 05:21:39,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:39,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:21:39,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:39,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622441812] [2023-11-19 05:21:39,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622441812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:21:39,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884357148] [2023-11-19 05:21:39,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:39,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:39,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:39,409 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:21:39,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:21:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:39,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:21:39,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 05:21:39,719 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:21:39,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884357148] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:39,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:21:39,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:21:39,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778934234] [2023-11-19 05:21:39,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:39,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:39,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:39,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:39,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:21:39,722 INFO L87 Difference]: Start difference. First operand 2355 states and 4327 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:21:40,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:40,326 INFO L93 Difference]: Finished difference Result 3760 states and 6462 transitions. [2023-11-19 05:21:40,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:40,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 131 [2023-11-19 05:21:40,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:40,348 INFO L225 Difference]: With dead ends: 3760 [2023-11-19 05:21:40,349 INFO L226 Difference]: Without dead ends: 3051 [2023-11-19 05:21:40,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:21:40,355 INFO L413 NwaCegarLoop]: 3331 mSDtfsCounter, 3521 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3521 SdHoareTripleChecker+Valid, 3560 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:40,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3521 Valid, 3560 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:21:40,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2023-11-19 05:21:40,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 3043. [2023-11-19 05:21:40,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 2827 states have (on average 1.772550406791652) internal successors, (5011), 2834 states have internal predecessors, (5011), 166 states have call successors, (166), 49 states have call predecessors, (166), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2023-11-19 05:21:40,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 5341 transitions. [2023-11-19 05:21:40,503 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 5341 transitions. Word has length 131 [2023-11-19 05:21:40,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:40,504 INFO L495 AbstractCegarLoop]: Abstraction has 3043 states and 5341 transitions. [2023-11-19 05:21:40,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:21:40,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 5341 transitions. [2023-11-19 05:21:40,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-19 05:21:40,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:40,511 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:40,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:21:40,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:40,734 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:40,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:40,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1754919833, now seen corresponding path program 1 times [2023-11-19 05:21:40,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:40,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175172037] [2023-11-19 05:21:40,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:40,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:21:40,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:40,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175172037] [2023-11-19 05:21:40,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175172037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:21:40,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256984966] [2023-11-19 05:21:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:40,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:40,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:40,939 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:21:40,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:21:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:41,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:21:41,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-19 05:21:41,241 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:21:41,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256984966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:41,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:21:41,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:21:41,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926755175] [2023-11-19 05:21:41,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:41,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:41,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:41,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:41,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:21:41,246 INFO L87 Difference]: Start difference. First operand 3043 states and 5341 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:21:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:41,872 INFO L93 Difference]: Finished difference Result 5812 states and 9534 transitions. [2023-11-19 05:21:41,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:41,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 131 [2023-11-19 05:21:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:41,906 INFO L225 Difference]: With dead ends: 5812 [2023-11-19 05:21:41,906 INFO L226 Difference]: Without dead ends: 4415 [2023-11-19 05:21:41,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:21:41,917 INFO L413 NwaCegarLoop]: 3347 mSDtfsCounter, 3527 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3527 SdHoareTripleChecker+Valid, 3576 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:41,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3527 Valid, 3576 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:21:41,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4415 states. [2023-11-19 05:21:42,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4415 to 4403. [2023-11-19 05:21:42,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4403 states, 3987 states have (on average 1.6812139453222974) internal successors, (6703), 3998 states have internal predecessors, (6703), 318 states have call successors, (318), 97 states have call predecessors, (318), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2023-11-19 05:21:42,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 7337 transitions. [2023-11-19 05:21:42,145 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 7337 transitions. Word has length 131 [2023-11-19 05:21:42,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:42,145 INFO L495 AbstractCegarLoop]: Abstraction has 4403 states and 7337 transitions. [2023-11-19 05:21:42,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:21:42,146 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 7337 transitions. [2023-11-19 05:21:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-19 05:21:42,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:42,156 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:42,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:21:42,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:42,380 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:42,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:42,380 INFO L85 PathProgramCache]: Analyzing trace with hash -789573079, now seen corresponding path program 1 times [2023-11-19 05:21:42,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:42,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257602037] [2023-11-19 05:21:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:42,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:21:42,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:42,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257602037] [2023-11-19 05:21:42,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257602037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:21:42,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557627981] [2023-11-19 05:21:42,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:42,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:42,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:42,604 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:21:42,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:21:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:42,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:21:42,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 05:21:42,910 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:21:42,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557627981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:42,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:21:42,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:21:42,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158844342] [2023-11-19 05:21:42,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:42,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:42,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:42,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:42,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:21:42,913 INFO L87 Difference]: Start difference. First operand 4403 states and 7337 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:21:43,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:43,749 INFO L93 Difference]: Finished difference Result 9868 states and 15578 transitions. [2023-11-19 05:21:43,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:43,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 131 [2023-11-19 05:21:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:43,799 INFO L225 Difference]: With dead ends: 9868 [2023-11-19 05:21:43,800 INFO L226 Difference]: Without dead ends: 7111 [2023-11-19 05:21:43,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:21:43,813 INFO L413 NwaCegarLoop]: 3293 mSDtfsCounter, 3515 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 3522 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:43,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3515 Valid, 3522 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:21:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7111 states. [2023-11-19 05:21:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7111 to 7091. [2023-11-19 05:21:44,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7091 states, 6283 states have (on average 1.5978035970077988) internal successors, (10039), 6302 states have internal predecessors, (10039), 614 states have call successors, (614), 193 states have call predecessors, (614), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2023-11-19 05:21:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7091 states to 7091 states and 11265 transitions. [2023-11-19 05:21:44,169 INFO L78 Accepts]: Start accepts. Automaton has 7091 states and 11265 transitions. Word has length 131 [2023-11-19 05:21:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:44,170 INFO L495 AbstractCegarLoop]: Abstraction has 7091 states and 11265 transitions. [2023-11-19 05:21:44,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:21:44,172 INFO L276 IsEmpty]: Start isEmpty. Operand 7091 states and 11265 transitions. [2023-11-19 05:21:44,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-19 05:21:44,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:44,188 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:44,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:21:44,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:44,404 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:44,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:44,405 INFO L85 PathProgramCache]: Analyzing trace with hash 521349867, now seen corresponding path program 1 times [2023-11-19 05:21:44,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:44,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611648040] [2023-11-19 05:21:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:44,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:21:44,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:44,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611648040] [2023-11-19 05:21:44,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611648040] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:21:44,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349281433] [2023-11-19 05:21:44,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:44,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:44,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:44,627 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:21:44,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:21:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:44,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:21:44,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-19 05:21:44,923 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:21:44,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349281433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:44,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:21:44,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:21:44,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994895411] [2023-11-19 05:21:44,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:44,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:44,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:44,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:44,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:21:44,926 INFO L87 Difference]: Start difference. First operand 7091 states and 11265 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:21:45,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:45,738 INFO L93 Difference]: Finished difference Result 17884 states and 27466 transitions. [2023-11-19 05:21:45,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:45,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 131 [2023-11-19 05:21:45,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:45,833 INFO L225 Difference]: With dead ends: 17884 [2023-11-19 05:21:45,833 INFO L226 Difference]: Without dead ends: 12439 [2023-11-19 05:21:45,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:21:45,861 INFO L413 NwaCegarLoop]: 3343 mSDtfsCounter, 3530 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3530 SdHoareTripleChecker+Valid, 3572 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:45,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3530 Valid, 3572 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:21:45,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12439 states. [2023-11-19 05:21:46,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12439 to 12403. [2023-11-19 05:21:46,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12403 states, 10827 states have (on average 1.534589452295188) internal successors, (16615), 10862 states have internal predecessors, (16615), 1190 states have call successors, (1190), 385 states have call predecessors, (1190), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2023-11-19 05:21:46,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12403 states to 12403 states and 18993 transitions. [2023-11-19 05:21:46,459 INFO L78 Accepts]: Start accepts. Automaton has 12403 states and 18993 transitions. Word has length 131 [2023-11-19 05:21:46,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:46,461 INFO L495 AbstractCegarLoop]: Abstraction has 12403 states and 18993 transitions. [2023-11-19 05:21:46,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:21:46,462 INFO L276 IsEmpty]: Start isEmpty. Operand 12403 states and 18993 transitions. [2023-11-19 05:21:46,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-19 05:21:46,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:46,489 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:46,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:21:46,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 05:21:46,704 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:46,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:46,705 INFO L85 PathProgramCache]: Analyzing trace with hash 65484265, now seen corresponding path program 1 times [2023-11-19 05:21:46,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:46,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829631511] [2023-11-19 05:21:46,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:46,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:21:47,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:47,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829631511] [2023-11-19 05:21:47,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829631511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:21:47,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969495] [2023-11-19 05:21:47,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:47,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:47,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:47,096 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:21:47,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:21:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:47,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:21:47,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:21:47,433 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:21:47,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:47,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:21:47,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:21:47,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653370575] [2023-11-19 05:21:47,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:47,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:47,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:47,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:47,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:21:47,440 INFO L87 Difference]: Start difference. First operand 12403 states and 18993 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:21:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:48,777 INFO L93 Difference]: Finished difference Result 33724 states and 50842 transitions. [2023-11-19 05:21:48,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:48,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 131 [2023-11-19 05:21:48,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:48,896 INFO L225 Difference]: With dead ends: 33724 [2023-11-19 05:21:48,896 INFO L226 Difference]: Without dead ends: 22967 [2023-11-19 05:21:48,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:21:48,948 INFO L413 NwaCegarLoop]: 3293 mSDtfsCounter, 3503 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3503 SdHoareTripleChecker+Valid, 3522 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:48,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3503 Valid, 3522 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:21:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22967 states. [2023-11-19 05:21:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22967 to 22899. [2023-11-19 05:21:50,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22899 states, 19819 states have (on average 1.492254906907513) internal successors, (29575), 19886 states have internal predecessors, (29575), 2310 states have call successors, (2310), 769 states have call predecessors, (2310), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2023-11-19 05:21:50,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22899 states to 22899 states and 34193 transitions. [2023-11-19 05:21:50,519 INFO L78 Accepts]: Start accepts. Automaton has 22899 states and 34193 transitions. Word has length 131 [2023-11-19 05:21:50,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:50,520 INFO L495 AbstractCegarLoop]: Abstraction has 22899 states and 34193 transitions. [2023-11-19 05:21:50,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:21:50,520 INFO L276 IsEmpty]: Start isEmpty. Operand 22899 states and 34193 transitions. [2023-11-19 05:21:50,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-19 05:21:50,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:50,563 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:50,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:21:50,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ea2d55a-7d37-4cff-b21c-d7bd2b010e32/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 05:21:50,776 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:50,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:50,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1298653611, now seen corresponding path program 1 times [2023-11-19 05:21:50,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:50,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080359720] [2023-11-19 05:21:50,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:50,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 05:21:51,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:51,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080359720] [2023-11-19 05:21:51,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080359720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:51,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:51,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:21:51,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626022144] [2023-11-19 05:21:51,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:51,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:21:51,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:51,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:21:51,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:21:51,752 INFO L87 Difference]: Start difference. First operand 22899 states and 34193 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 05:21:54,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:54,055 INFO L93 Difference]: Finished difference Result 56987 states and 84151 transitions. [2023-11-19 05:21:54,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 05:21:54,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 131 [2023-11-19 05:21:54,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:54,192 INFO L225 Difference]: With dead ends: 56987 [2023-11-19 05:21:54,192 INFO L226 Difference]: Without dead ends: 35735 [2023-11-19 05:21:54,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:21:54,243 INFO L413 NwaCegarLoop]: 3334 mSDtfsCounter, 4012 mSDsluCounter, 6641 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4018 SdHoareTripleChecker+Valid, 9975 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:54,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4018 Valid, 9975 Invalid, 1060 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [105 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 05:21:54,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35735 states.