./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ece5e10278ff4277201bc584c9d4f272bab8d3b56dec5e2dfa257f3717fce473 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:18:12,812 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:18:12,969 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:18:12,979 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:18:12,980 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:18:13,037 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:18:13,039 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:18:13,039 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:18:13,041 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:18:13,047 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:18:13,048 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:18:13,048 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:18:13,049 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:18:13,051 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:18:13,051 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:18:13,052 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:18:13,052 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:18:13,053 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:18:13,053 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:18:13,054 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:18:13,054 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:18:13,057 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:18:13,058 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:18:13,059 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:18:13,059 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:18:13,060 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:18:13,060 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:18:13,061 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:18:13,061 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:18:13,062 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:18:13,063 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:18:13,064 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:18:13,064 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:18:13,064 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:18:13,065 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:18:13,065 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:18:13,065 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:18:13,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:18:13,066 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:18:13,066 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:18:13,066 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:18:13,067 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:18:13,067 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:18:13,067 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:18:13,068 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:18:13,068 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:18:13,069 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:18:13,069 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_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ece5e10278ff4277201bc584c9d4f272bab8d3b56dec5e2dfa257f3717fce473 [2023-11-23 21:18:13,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:18:13,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:18:13,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:18:13,501 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:18:13,502 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:18:13,503 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-2.c [2023-11-23 21:18:16,692 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:18:17,503 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:18:17,504 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-2.c [2023-11-23 21:18:17,568 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/data/810a98b7b/98fe9ca3384d4b3aa22d5ea531af24c7/FLAG36cef244f [2023-11-23 21:18:17,585 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/data/810a98b7b/98fe9ca3384d4b3aa22d5ea531af24c7 [2023-11-23 21:18:17,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:18:17,589 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:18:17,591 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:18:17,591 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:18:17,600 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:18:17,601 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:18:17" (1/1) ... [2023-11-23 21:18:17,602 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b784b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:17, skipping insertion in model container [2023-11-23 21:18:17,603 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:18:17" (1/1) ... [2023-11-23 21:18:18,010 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:18:20,860 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_c362eaf3-c063-4e35-8fc7-b891a617acc3/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-2.c[381679,381692] [2023-11-23 21:18:20,890 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_c362eaf3-c063-4e35-8fc7-b891a617acc3/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-2.c[383339,383352] [2023-11-23 21:18:21,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:18:21,206 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:18:22,473 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_c362eaf3-c063-4e35-8fc7-b891a617acc3/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-2.c[381679,381692] [2023-11-23 21:18:22,480 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_c362eaf3-c063-4e35-8fc7-b891a617acc3/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-2.c[383339,383352] [2023-11-23 21:18:22,519 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:18:22,599 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:18:22,599 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:22 WrapperNode [2023-11-23 21:18:22,599 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:18:22,600 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:18:22,600 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:18:22,600 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:18:22,608 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:22" (1/1) ... [2023-11-23 21:18:22,734 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:22" (1/1) ... [2023-11-23 21:18:23,426 INFO L138 Inliner]: procedures = 58, calls = 63, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 12934 [2023-11-23 21:18:23,426 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:18:23,427 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:18:23,427 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:18:23,427 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:18:23,451 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:22" (1/1) ... [2023-11-23 21:18:23,464 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:22" (1/1) ... [2023-11-23 21:18:23,596 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:22" (1/1) ... [2023-11-23 21:18:23,596 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:22" (1/1) ... [2023-11-23 21:18:23,856 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:22" (1/1) ... [2023-11-23 21:18:23,918 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:22" (1/1) ... [2023-11-23 21:18:23,953 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:22" (1/1) ... [2023-11-23 21:18:23,976 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:22" (1/1) ... [2023-11-23 21:18:24,052 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:18:24,054 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:18:24,054 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:18:24,054 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:18:24,055 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:22" (1/1) ... [2023-11-23 21:18:24,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:18:24,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:24,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:18:24,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:18:24,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:18:24,153 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-23 21:18:24,154 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-23 21:18:24,154 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 21:18:24,154 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 21:18:24,154 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-23 21:18:24,154 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-23 21:18:24,155 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-23 21:18:24,155 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-23 21:18:24,155 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-23 21:18:24,155 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-23 21:18:24,155 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-23 21:18:24,156 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-23 21:18:24,156 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-23 21:18:24,156 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-23 21:18:24,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:18:24,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:18:24,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:18:24,396 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:18:24,398 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:18:34,360 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:18:37,018 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:18:37,019 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-23 21:18:37,022 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:18:37 BoogieIcfgContainer [2023-11-23 21:18:37,022 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:18:37,027 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:18:37,027 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:18:37,031 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:18:37,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:18:17" (1/3) ... [2023-11-23 21:18:37,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c78c06f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:18:37, skipping insertion in model container [2023-11-23 21:18:37,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:22" (2/3) ... [2023-11-23 21:18:37,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c78c06f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:18:37, skipping insertion in model container [2023-11-23 21:18:37,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:18:37" (3/3) ... [2023-11-23 21:18:37,036 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.07.cil-2.c [2023-11-23 21:18:37,063 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:18:37,063 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 21:18:37,212 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:18:37,222 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;@653957b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:18:37,223 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 21:18:37,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 1790 states, 1757 states have (on average 1.9618668184405237) internal successors, (3447), 1762 states have internal predecessors, (3447), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-23 21:18:37,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 21:18:37,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:37,266 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] [2023-11-23 21:18:37,268 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:37,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:37,279 INFO L85 PathProgramCache]: Analyzing trace with hash 695412370, now seen corresponding path program 1 times [2023-11-23 21:18:37,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:37,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780799217] [2023-11-23 21:18:37,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:37,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:18:38,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:38,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780799217] [2023-11-23 21:18:38,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780799217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:38,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:38,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:18:38,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898074733] [2023-11-23 21:18:38,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:38,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:18:38,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:38,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:18:38,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:18:38,140 INFO L87 Difference]: Start difference. First operand has 1790 states, 1757 states have (on average 1.9618668184405237) internal successors, (3447), 1762 states have internal predecessors, (3447), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2023-11-23 21:18:39,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:39,285 INFO L93 Difference]: Finished difference Result 3703 states and 7191 transitions. [2023-11-23 21:18:39,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:18:39,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 53 [2023-11-23 21:18:39,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:39,316 INFO L225 Difference]: With dead ends: 3703 [2023-11-23 21:18:39,316 INFO L226 Difference]: Without dead ends: 1912 [2023-11-23 21:18:39,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:18:39,330 INFO L413 NwaCegarLoop]: 3384 mSDtfsCounter, 3638 mSDsluCounter, 3304 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3638 SdHoareTripleChecker+Valid, 6688 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:39,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3638 Valid, 6688 Invalid, 664 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:18:39,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2023-11-23 21:18:39,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1911. [2023-11-23 21:18:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1857 states have (on average 1.9289176090468498) internal successors, (3582), 1861 states have internal predecessors, (3582), 40 states have call successors, (40), 13 states have call predecessors, (40), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-23 21:18:39,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 3660 transitions. [2023-11-23 21:18:39,578 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 3660 transitions. Word has length 53 [2023-11-23 21:18:39,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:39,579 INFO L495 AbstractCegarLoop]: Abstraction has 1911 states and 3660 transitions. [2023-11-23 21:18:39,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2023-11-23 21:18:39,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 3660 transitions. [2023-11-23 21:18:39,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-23 21:18:39,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:39,588 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:39,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:18:39,589 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:39,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:39,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1947622781, now seen corresponding path program 1 times [2023-11-23 21:18:39,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:39,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697261485] [2023-11-23 21:18:39,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:39,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:18:39,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:39,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697261485] [2023-11-23 21:18:39,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697261485] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:18:39,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620497538] [2023-11-23 21:18:39,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:39,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:39,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:39,975 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:18:40,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:18:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:40,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:18:40,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 21:18:40,346 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:18:40,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620497538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:40,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:18:40,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:18:40,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217784149] [2023-11-23 21:18:40,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:40,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:18:40,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:40,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:18:40,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:18:40,354 INFO L87 Difference]: Start difference. First operand 1911 states and 3660 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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) [2023-11-23 21:18:41,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:41,020 INFO L93 Difference]: Finished difference Result 2434 states and 4437 transitions. [2023-11-23 21:18:41,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:18:41,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 103 [2023-11-23 21:18:41,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:41,044 INFO L225 Difference]: With dead ends: 2434 [2023-11-23 21:18:41,045 INFO L226 Difference]: Without dead ends: 2169 [2023-11-23 21:18:41,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:18:41,050 INFO L413 NwaCegarLoop]: 3279 mSDtfsCounter, 3451 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:41,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3451 Valid, 3444 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:18:41,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2023-11-23 21:18:41,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 2163. [2023-11-23 21:18:41,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2065 states have (on average 1.8794188861985472) internal successors, (3881), 2070 states have internal predecessors, (3881), 72 states have call successors, (72), 25 states have call predecessors, (72), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-23 21:18:41,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 4023 transitions. [2023-11-23 21:18:41,191 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 4023 transitions. Word has length 103 [2023-11-23 21:18:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:41,192 INFO L495 AbstractCegarLoop]: Abstraction has 2163 states and 4023 transitions. [2023-11-23 21:18:41,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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) [2023-11-23 21:18:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 4023 transitions. [2023-11-23 21:18:41,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-23 21:18:41,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:41,204 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:41,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:18:41,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:41,424 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:41,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:41,425 INFO L85 PathProgramCache]: Analyzing trace with hash 462022085, now seen corresponding path program 1 times [2023-11-23 21:18:41,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:41,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655980853] [2023-11-23 21:18:41,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:41,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:18:41,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:41,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655980853] [2023-11-23 21:18:41,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655980853] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:18:41,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296985763] [2023-11-23 21:18:41,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:41,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:41,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:41,781 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:18:41,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:18:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:42,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:18:42,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:18:42,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:18:42,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296985763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:42,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:18:42,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:18:42,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680005896] [2023-11-23 21:18:42,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:42,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:18:42,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:42,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:18:42,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:18:42,129 INFO L87 Difference]: Start difference. First operand 2163 states and 4023 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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) [2023-11-23 21:18:42,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:42,928 INFO L93 Difference]: Finished difference Result 3184 states and 5534 transitions. [2023-11-23 21:18:42,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:18:42,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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 103 [2023-11-23 21:18:42,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:42,947 INFO L225 Difference]: With dead ends: 3184 [2023-11-23 21:18:42,947 INFO L226 Difference]: Without dead ends: 2667 [2023-11-23 21:18:42,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:18:42,951 INFO L413 NwaCegarLoop]: 3247 mSDtfsCounter, 3445 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 3412 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:42,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3445 Valid, 3412 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:18:42,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2023-11-23 21:18:43,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2659. [2023-11-23 21:18:43,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2475 states have (on average 1.804848484848485) internal successors, (4467), 2482 states have internal predecessors, (4467), 134 states have call successors, (134), 49 states have call predecessors, (134), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2023-11-23 21:18:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 4733 transitions. [2023-11-23 21:18:43,054 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 4733 transitions. Word has length 103 [2023-11-23 21:18:43,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:43,055 INFO L495 AbstractCegarLoop]: Abstraction has 2659 states and 4733 transitions. [2023-11-23 21:18:43,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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) [2023-11-23 21:18:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 4733 transitions. [2023-11-23 21:18:43,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-23 21:18:43,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:43,060 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:43,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:18:43,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:43,274 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:43,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:43,275 INFO L85 PathProgramCache]: Analyzing trace with hash -328842617, now seen corresponding path program 1 times [2023-11-23 21:18:43,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:43,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642661107] [2023-11-23 21:18:43,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:43,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:18:43,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:43,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642661107] [2023-11-23 21:18:43,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642661107] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:18:43,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759346770] [2023-11-23 21:18:43,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:43,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:43,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:43,451 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:18:43,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:18:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:43,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:18:43,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-23 21:18:43,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:18:43,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759346770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:43,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:18:43,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:18:43,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861841786] [2023-11-23 21:18:43,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:43,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:18:43,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:43,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:18:43,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:18:43,715 INFO L87 Difference]: Start difference. First operand 2659 states and 4733 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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) [2023-11-23 21:18:44,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:44,295 INFO L93 Difference]: Finished difference Result 4660 states and 7678 transitions. [2023-11-23 21:18:44,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:18:44,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 103 [2023-11-23 21:18:44,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:44,321 INFO L225 Difference]: With dead ends: 4660 [2023-11-23 21:18:44,321 INFO L226 Difference]: Without dead ends: 3647 [2023-11-23 21:18:44,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:18:44,333 INFO L413 NwaCegarLoop]: 3275 mSDtfsCounter, 3454 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3454 SdHoareTripleChecker+Valid, 3440 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:44,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3454 Valid, 3440 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:18:44,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2023-11-23 21:18:44,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 3635. [2023-11-23 21:18:44,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3635 states, 3283 states have (on average 1.7103259214133415) internal successors, (5615), 3294 states have internal predecessors, (5615), 254 states have call successors, (254), 97 states have call predecessors, (254), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2023-11-23 21:18:44,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3635 states to 3635 states and 6121 transitions. [2023-11-23 21:18:44,532 INFO L78 Accepts]: Start accepts. Automaton has 3635 states and 6121 transitions. Word has length 103 [2023-11-23 21:18:44,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:44,532 INFO L495 AbstractCegarLoop]: Abstraction has 3635 states and 6121 transitions. [2023-11-23 21:18:44,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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) [2023-11-23 21:18:44,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3635 states and 6121 transitions. [2023-11-23 21:18:44,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-23 21:18:44,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:44,543 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:44,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:18:44,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:44,769 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:44,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:44,769 INFO L85 PathProgramCache]: Analyzing trace with hash -682024955, now seen corresponding path program 1 times [2023-11-23 21:18:44,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:44,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127381074] [2023-11-23 21:18:44,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:44,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:18:44,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:44,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127381074] [2023-11-23 21:18:44,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127381074] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:18:44,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218385713] [2023-11-23 21:18:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:44,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:44,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:44,968 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:18:44,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:18:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:45,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:18:45,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:18:45,251 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:18:45,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218385713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:45,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:18:45,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:18:45,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573143203] [2023-11-23 21:18:45,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:45,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:18:45,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:45,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:18:45,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:18:45,255 INFO L87 Difference]: Start difference. First operand 3635 states and 6121 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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) [2023-11-23 21:18:46,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:46,052 INFO L93 Difference]: Finished difference Result 7564 states and 11866 transitions. [2023-11-23 21:18:46,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:18:46,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 103 [2023-11-23 21:18:46,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:46,101 INFO L225 Difference]: With dead ends: 7564 [2023-11-23 21:18:46,101 INFO L226 Difference]: Without dead ends: 5575 [2023-11-23 21:18:46,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:18:46,113 INFO L413 NwaCegarLoop]: 3229 mSDtfsCounter, 3439 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3439 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:46,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3439 Valid, 3394 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:18:46,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5575 states. [2023-11-23 21:18:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5575 to 5555. [2023-11-23 21:18:46,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5555 states, 4875 states have (on average 1.612923076923077) internal successors, (7863), 4894 states have internal predecessors, (7863), 486 states have call successors, (486), 193 states have call predecessors, (486), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-23 21:18:46,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5555 states to 5555 states and 8833 transitions. [2023-11-23 21:18:46,417 INFO L78 Accepts]: Start accepts. Automaton has 5555 states and 8833 transitions. Word has length 103 [2023-11-23 21:18:46,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:46,417 INFO L495 AbstractCegarLoop]: Abstraction has 5555 states and 8833 transitions. [2023-11-23 21:18:46,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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) [2023-11-23 21:18:46,418 INFO L276 IsEmpty]: Start isEmpty. Operand 5555 states and 8833 transitions. [2023-11-23 21:18:46,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-23 21:18:46,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:46,432 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:46,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:18:46,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c362eaf3-c063-4e35-8fc7-b891a617acc3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:46,654 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:46,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:46,654 INFO L85 PathProgramCache]: Analyzing trace with hash 685946439, now seen corresponding path program 1 times [2023-11-23 21:18:46,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:46,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940993184] [2023-11-23 21:18:46,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:46,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-23 21:18:46,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:46,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940993184] [2023-11-23 21:18:46,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940993184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:46,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:46,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:18:46,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248933185] [2023-11-23 21:18:46,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:46,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:18:46,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:46,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:18:46,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:18:46,952 INFO L87 Difference]: Start difference. First operand 5555 states and 8833 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:18:47,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:47,856 INFO L93 Difference]: Finished difference Result 8663 states and 13380 transitions. [2023-11-23 21:18:47,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:18:47,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 103 [2023-11-23 21:18:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:47,937 INFO L225 Difference]: With dead ends: 8663 [2023-11-23 21:18:47,938 INFO L226 Difference]: Without dead ends: 6643 [2023-11-23 21:18:47,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:18:47,952 INFO L413 NwaCegarLoop]: 3323 mSDtfsCounter, 89 mSDsluCounter, 3237 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 6560 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:47,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 6560 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:18:47,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6643 states. [2023-11-23 21:18:48,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6643 to 6323. [2023-11-23 21:18:48,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6323 states, 5611 states have (on average 1.6095170201390125) internal successors, (9031), 5630 states have internal predecessors, (9031), 502 states have call successors, (502), 209 states have call predecessors, (502), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2023-11-23 21:18:48,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6323 states to 6323 states and 10033 transitions. [2023-11-23 21:18:48,329 INFO L78 Accepts]: Start accepts. Automaton has 6323 states and 10033 transitions. Word has length 103 [2023-11-23 21:18:48,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:48,330 INFO L495 AbstractCegarLoop]: Abstraction has 6323 states and 10033 transitions. [2023-11-23 21:18:48,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:18:48,332 INFO L276 IsEmpty]: Start isEmpty. Operand 6323 states and 10033 transitions. [2023-11-23 21:18:48,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-23 21:18:48,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:48,357 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2023-11-23 21:18:48,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:18:48,358 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:48,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:48,359 INFO L85 PathProgramCache]: Analyzing trace with hash -274542776, now seen corresponding path program 1 times [2023-11-23 21:18:48,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:48,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448225668] [2023-11-23 21:18:48,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:48,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-23 21:18:48,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:48,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448225668] [2023-11-23 21:18:48,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448225668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:48,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:48,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:18:48,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328879894] [2023-11-23 21:18:48,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:48,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:18:48,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:48,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:18:48,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:18:48,508 INFO L87 Difference]: Start difference. First operand 6323 states and 10033 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:18:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:49,412 INFO L93 Difference]: Finished difference Result 15532 states and 23546 transitions. [2023-11-23 21:18:49,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:18:49,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 139 [2023-11-23 21:18:49,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:49,458 INFO L225 Difference]: With dead ends: 15532 [2023-11-23 21:18:49,459 INFO L226 Difference]: Without dead ends: 10855 [2023-11-23 21:18:49,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:18:49,478 INFO L413 NwaCegarLoop]: 3231 mSDtfsCounter, 3442 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3442 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:49,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3442 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:18:49,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10855 states. [2023-11-23 21:18:49,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 10803. [2023-11-23 21:18:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10803 states, 9419 states have (on average 1.5363626711965177) internal successors, (14471), 9454 states have internal predecessors, (14471), 966 states have call successors, (966), 417 states have call predecessors, (966), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2023-11-23 21:18:49,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10803 states to 10803 states and 16401 transitions. [2023-11-23 21:18:49,969 INFO L78 Accepts]: Start accepts. Automaton has 10803 states and 16401 transitions. Word has length 139 [2023-11-23 21:18:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:49,969 INFO L495 AbstractCegarLoop]: Abstraction has 10803 states and 16401 transitions. [2023-11-23 21:18:49,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:18:49,970 INFO L276 IsEmpty]: Start isEmpty. Operand 10803 states and 16401 transitions. [2023-11-23 21:18:50,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-23 21:18:50,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:50,135 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2023-11-23 21:18:50,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:18:50,136 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:50,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:50,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1819255913, now seen corresponding path program 1 times [2023-11-23 21:18:50,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:50,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942723537] [2023-11-23 21:18:50,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:50,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-23 21:18:50,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:50,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942723537] [2023-11-23 21:18:50,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942723537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:50,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:50,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:18:50,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110199446] [2023-11-23 21:18:50,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:50,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:18:50,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:50,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:18:50,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:18:50,278 INFO L87 Difference]: Start difference. First operand 10803 states and 16401 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:18:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:51,320 INFO L93 Difference]: Finished difference Result 28828 states and 42618 transitions. [2023-11-23 21:18:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:18:51,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 139 [2023-11-23 21:18:51,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:51,405 INFO L225 Difference]: With dead ends: 28828 [2023-11-23 21:18:51,405 INFO L226 Difference]: Without dead ends: 19671 [2023-11-23 21:18:51,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:18:51,447 INFO L413 NwaCegarLoop]: 3231 mSDtfsCounter, 3444 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3444 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:51,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3444 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:18:51,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19671 states. [2023-11-23 21:18:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19671 to 19571. [2023-11-23 21:18:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19571 states, 16875 states have (on average 1.4833185185185185) internal successors, (25031), 16942 states have internal predecessors, (25031), 1862 states have call successors, (1862), 833 states have call predecessors, (1862), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2023-11-23 21:18:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19571 states to 19571 states and 28753 transitions. [2023-11-23 21:18:52,568 INFO L78 Accepts]: Start accepts. Automaton has 19571 states and 28753 transitions. Word has length 139 [2023-11-23 21:18:52,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:52,569 INFO L495 AbstractCegarLoop]: Abstraction has 19571 states and 28753 transitions. [2023-11-23 21:18:52,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:18:52,570 INFO L276 IsEmpty]: Start isEmpty. Operand 19571 states and 28753 transitions. [2023-11-23 21:18:52,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-23 21:18:52,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:52,641 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2023-11-23 21:18:52,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:18:52,642 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:52,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:52,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1214797041, now seen corresponding path program 1 times [2023-11-23 21:18:52,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:52,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142055064] [2023-11-23 21:18:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:52,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-23 21:18:52,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:52,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142055064] [2023-11-23 21:18:52,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142055064] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:52,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:52,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:18:52,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397147336] [2023-11-23 21:18:52,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:52,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:18:52,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:52,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:18:52,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:18:52,784 INFO L87 Difference]: Start difference. First operand 19571 states and 28753 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:18:55,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:55,080 INFO L93 Difference]: Finished difference Result 54844 states and 79578 transitions. [2023-11-23 21:18:55,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:18:55,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 139 [2023-11-23 21:18:55,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:55,256 INFO L225 Difference]: With dead ends: 54844 [2023-11-23 21:18:55,257 INFO L226 Difference]: Without dead ends: 36919 [2023-11-23 21:18:55,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:18:55,333 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 3447 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3447 SdHoareTripleChecker+Valid, 3421 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:55,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3447 Valid, 3421 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:18:55,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36919 states. [2023-11-23 21:18:57,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36919 to 36723. [2023-11-23 21:18:57,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36723 states, 31467 states have (on average 1.446308831474243) internal successors, (45511), 31598 states have internal predecessors, (45511), 3590 states have call successors, (3590), 1665 states have call predecessors, (3590), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588)