./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f9cd80dbbe1b4066ac5bff4e37171791ef74a282de4eb4995f2a9b4ca41823fa --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:12:11,875 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:12:11,960 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:12:11,967 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:12:11,968 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:12:11,999 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:12:12,000 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:12:12,001 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:12:12,002 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:12:12,003 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:12:12,004 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:12:12,004 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:12:12,005 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:12:12,005 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:12:12,006 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:12:12,007 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:12:12,007 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:12:12,008 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:12:12,009 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:12:12,009 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:12:12,010 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:12:12,010 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:12:12,011 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:12:12,012 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:12:12,013 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:12:12,013 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:12:12,014 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:12:12,014 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:12:12,015 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:12:12,015 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:12:12,016 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:12:12,016 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:12:12,017 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:12:12,017 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:12:12,018 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:12:12,018 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:12:12,019 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:12:12,019 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:12:12,020 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:12:12,020 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:12:12,021 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:12:12,021 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:12:12,022 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:12:12,022 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:12:12,023 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:12:12,023 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_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9cd80dbbe1b4066ac5bff4e37171791ef74a282de4eb4995f2a9b4ca41823fa [2023-11-19 05:12:12,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:12:12,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:12:12,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:12:12,407 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:12:12,408 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:12:12,410 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c [2023-11-19 05:12:15,710 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:12:16,630 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:12:16,630 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c [2023-11-19 05:12:16,692 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/data/bfb7ad7e9/ccacff39735745d4aa86ff823032875b/FLAGc05edf073 [2023-11-19 05:12:16,712 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/data/bfb7ad7e9/ccacff39735745d4aa86ff823032875b [2023-11-19 05:12:16,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:12:16,725 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:12:16,727 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:12:16,728 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:12:16,734 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:12:16,735 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:12:16" (1/1) ... [2023-11-19 05:12:16,736 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@461dd0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:16, skipping insertion in model container [2023-11-19 05:12:16,737 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:12:16" (1/1) ... [2023-11-19 05:12:17,060 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:12:19,347 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_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c[375709,375722] [2023-11-19 05:12:19,390 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_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c[383339,383352] [2023-11-19 05:12:19,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:12:19,656 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:12:21,191 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_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c[375709,375722] [2023-11-19 05:12:21,207 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_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c[383339,383352] [2023-11-19 05:12:21,233 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:12:21,353 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:12:21,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:21 WrapperNode [2023-11-19 05:12:21,354 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:12:21,357 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:12:21,357 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:12:21,358 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:12:21,368 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:21" (1/1) ... [2023-11-19 05:12:21,499 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:21" (1/1) ... [2023-11-19 05:12:22,090 INFO L138 Inliner]: procedures = 56, calls = 59, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 12868 [2023-11-19 05:12:22,091 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:12:22,092 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:12:22,092 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:12:22,092 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:12:22,104 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:21" (1/1) ... [2023-11-19 05:12:22,104 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:21" (1/1) ... [2023-11-19 05:12:22,309 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:21" (1/1) ... [2023-11-19 05:12:22,316 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:21" (1/1) ... [2023-11-19 05:12:22,609 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:21" (1/1) ... [2023-11-19 05:12:22,676 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:21" (1/1) ... [2023-11-19 05:12:22,836 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:21" (1/1) ... [2023-11-19 05:12:22,887 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:21" (1/1) ... [2023-11-19 05:12:22,996 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:12:23,007 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:12:23,008 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:12:23,008 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:12:23,009 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:21" (1/1) ... [2023-11-19 05:12:23,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:12:23,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:23,048 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:12:23,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:12:23,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:12:23,104 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-19 05:12:23,104 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-19 05:12:23,104 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:12:23,105 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:12:23,105 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-19 05:12:23,105 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-19 05:12:23,105 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-19 05:12:23,106 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-19 05:12:23,106 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-19 05:12:23,106 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-19 05:12:23,106 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-19 05:12:23,107 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-19 05:12:23,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:12:23,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:12:23,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:12:23,258 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:12:23,261 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:12:33,088 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:12:36,074 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:12:36,074 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-19 05:12:36,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:12:36 BoogieIcfgContainer [2023-11-19 05:12:36,117 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:12:36,121 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:12:36,122 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:12:36,126 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:12:36,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:12:16" (1/3) ... [2023-11-19 05:12:36,128 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@280783f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:12:36, skipping insertion in model container [2023-11-19 05:12:36,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:21" (2/3) ... [2023-11-19 05:12:36,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@280783f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:12:36, skipping insertion in model container [2023-11-19 05:12:36,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:12:36" (3/3) ... [2023-11-19 05:12:36,131 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label48+token_ring.06.cil-2.c [2023-11-19 05:12:36,154 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:12:36,154 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:12:36,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:12:36,274 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;@2e26d429, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:12:36,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:12:36,289 INFO L276 IsEmpty]: Start isEmpty. Operand has 1772 states, 1743 states have (on average 1.9644291451520368) internal successors, (3424), 1746 states have internal predecessors, (3424), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-19 05:12:36,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 05:12:36,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:36,303 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] [2023-11-19 05:12:36,304 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:36,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:36,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1830630041, now seen corresponding path program 1 times [2023-11-19 05:12:36,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:36,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849470138] [2023-11-19 05:12:36,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:36,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:12:36,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:36,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849470138] [2023-11-19 05:12:36,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849470138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:36,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:36,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:12:36,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262872306] [2023-11-19 05:12:36,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:36,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:12:36,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:36,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:12:36,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:12:36,930 INFO L87 Difference]: Start difference. First operand has 1772 states, 1743 states have (on average 1.9644291451520368) internal successors, (3424), 1746 states have internal predecessors, (3424), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:12:38,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:38,158 INFO L93 Difference]: Finished difference Result 3656 states and 7112 transitions. [2023-11-19 05:12:38,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:12:38,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2023-11-19 05:12:38,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:38,200 INFO L225 Difference]: With dead ends: 3656 [2023-11-19 05:12:38,200 INFO L226 Difference]: Without dead ends: 1883 [2023-11-19 05:12:38,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:12:38,223 INFO L413 NwaCegarLoop]: 3345 mSDtfsCounter, 3595 mSDsluCounter, 3271 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3595 SdHoareTripleChecker+Valid, 6616 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:38,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3595 Valid, 6616 Invalid, 644 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 05:12:38,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2023-11-19 05:12:38,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1882. [2023-11-19 05:12:38,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1832 states have (on average 1.9334061135371179) internal successors, (3542), 1835 states have internal predecessors, (3542), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-19 05:12:38,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 3614 transitions. [2023-11-19 05:12:38,427 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 3614 transitions. Word has length 49 [2023-11-19 05:12:38,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:38,428 INFO L495 AbstractCegarLoop]: Abstraction has 1882 states and 3614 transitions. [2023-11-19 05:12:38,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:12:38,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 3614 transitions. [2023-11-19 05:12:38,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-19 05:12:38,445 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:38,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:38,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:12:38,448 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:38,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:38,449 INFO L85 PathProgramCache]: Analyzing trace with hash -698072333, now seen corresponding path program 1 times [2023-11-19 05:12:38,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:38,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955307217] [2023-11-19 05:12:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:38,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:12:38,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:38,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955307217] [2023-11-19 05:12:38,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955307217] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:38,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459732435] [2023-11-19 05:12:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:38,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:38,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:38,883 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:38,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:12:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:39,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:12:39,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:39,206 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:12:39,207 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:39,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459732435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:39,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:39,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:12:39,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575870329] [2023-11-19 05:12:39,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:39,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:39,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:39,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:39,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:39,222 INFO L87 Difference]: Start difference. First operand 1882 states and 3614 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:12:39,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:39,857 INFO L93 Difference]: Finished difference Result 2347 states and 4297 transitions. [2023-11-19 05:12:39,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:39,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2023-11-19 05:12:39,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:39,884 INFO L225 Difference]: With dead ends: 2347 [2023-11-19 05:12:39,884 INFO L226 Difference]: Without dead ends: 2111 [2023-11-19 05:12:39,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:39,889 INFO L413 NwaCegarLoop]: 3247 mSDtfsCounter, 3418 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3418 SdHoareTripleChecker+Valid, 3389 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:39,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3418 Valid, 3389 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:12:39,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2023-11-19 05:12:39,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 2107. [2023-11-19 05:12:39,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 2015 states have (on average 1.8863523573200993) internal successors, (3801), 2019 states have internal predecessors, (3801), 66 states have call successors, (66), 24 states have call predecessors, (66), 24 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-19 05:12:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 3933 transitions. [2023-11-19 05:12:40,004 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 3933 transitions. Word has length 95 [2023-11-19 05:12:40,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:40,005 INFO L495 AbstractCegarLoop]: Abstraction has 2107 states and 3933 transitions. [2023-11-19 05:12:40,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:12:40,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 3933 transitions. [2023-11-19 05:12:40,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-19 05:12:40,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:40,010 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:40,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:40,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:40,227 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:40,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:40,228 INFO L85 PathProgramCache]: Analyzing trace with hash 382412307, now seen corresponding path program 1 times [2023-11-19 05:12:40,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:40,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747576091] [2023-11-19 05:12:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:40,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:12:40,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:40,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747576091] [2023-11-19 05:12:40,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747576091] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:40,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083946828] [2023-11-19 05:12:40,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:40,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:40,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:40,481 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:40,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:12:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:40,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:12:40,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 05:12:40,747 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:40,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083946828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:40,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:40,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:12:40,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064216065] [2023-11-19 05:12:40,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:40,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:40,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:40,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:40,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:40,751 INFO L87 Difference]: Start difference. First operand 2107 states and 3933 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:12:41,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:41,337 INFO L93 Difference]: Finished difference Result 3016 states and 5260 transitions. [2023-11-19 05:12:41,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:41,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2023-11-19 05:12:41,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:41,357 INFO L225 Difference]: With dead ends: 3016 [2023-11-19 05:12:41,357 INFO L226 Difference]: Without dead ends: 2555 [2023-11-19 05:12:41,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:41,361 INFO L413 NwaCegarLoop]: 3227 mSDtfsCounter, 3427 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3427 SdHoareTripleChecker+Valid, 3369 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:41,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3427 Valid, 3369 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:12:41,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2023-11-19 05:12:41,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2549. [2023-11-19 05:12:41,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2549 states, 2375 states have (on average 1.8134736842105263) internal successors, (4307), 2381 states have internal predecessors, (4307), 124 states have call successors, (124), 48 states have call predecessors, (124), 48 states have return successors, (124), 120 states have call predecessors, (124), 124 states have call successors, (124) [2023-11-19 05:12:41,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2549 states to 2549 states and 4555 transitions. [2023-11-19 05:12:41,488 INFO L78 Accepts]: Start accepts. Automaton has 2549 states and 4555 transitions. Word has length 95 [2023-11-19 05:12:41,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:41,488 INFO L495 AbstractCegarLoop]: Abstraction has 2549 states and 4555 transitions. [2023-11-19 05:12:41,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:12:41,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2549 states and 4555 transitions. [2023-11-19 05:12:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-19 05:12:41,494 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:41,494 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:41,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:41,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:41,719 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:41,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:41,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1851668749, now seen corresponding path program 1 times [2023-11-19 05:12:41,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:41,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891729996] [2023-11-19 05:12:41,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:41,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:12:41,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:41,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891729996] [2023-11-19 05:12:41,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891729996] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:41,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425083910] [2023-11-19 05:12:41,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:41,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:41,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:41,898 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:41,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:12:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:42,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:12:42,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 05:12:42,138 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:42,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425083910] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:42,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:42,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:12:42,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484654780] [2023-11-19 05:12:42,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:42,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:42,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:42,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:42,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:42,141 INFO L87 Difference]: Start difference. First operand 2549 states and 4555 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:12:42,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:42,729 INFO L93 Difference]: Finished difference Result 4330 states and 7136 transitions. [2023-11-19 05:12:42,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:42,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2023-11-19 05:12:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:42,757 INFO L225 Difference]: With dead ends: 4330 [2023-11-19 05:12:42,757 INFO L226 Difference]: Without dead ends: 3427 [2023-11-19 05:12:42,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:42,764 INFO L413 NwaCegarLoop]: 3243 mSDtfsCounter, 3424 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3424 SdHoareTripleChecker+Valid, 3385 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:42,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3424 Valid, 3385 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:12:42,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2023-11-19 05:12:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3417. [2023-11-19 05:12:43,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3083 states have (on average 1.7174829711320143) internal successors, (5295), 3093 states have internal predecessors, (5295), 236 states have call successors, (236), 96 states have call predecessors, (236), 96 states have return successors, (236), 228 states have call predecessors, (236), 236 states have call successors, (236) [2023-11-19 05:12:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 5767 transitions. [2023-11-19 05:12:43,047 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 5767 transitions. Word has length 95 [2023-11-19 05:12:43,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:43,047 INFO L495 AbstractCegarLoop]: Abstraction has 3417 states and 5767 transitions. [2023-11-19 05:12:43,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:12:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 5767 transitions. [2023-11-19 05:12:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-19 05:12:43,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:43,056 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:43,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:43,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:43,276 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:43,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:43,276 INFO L85 PathProgramCache]: Analyzing trace with hash 819581459, now seen corresponding path program 1 times [2023-11-19 05:12:43,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:43,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257116228] [2023-11-19 05:12:43,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:43,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-19 05:12:43,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:43,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257116228] [2023-11-19 05:12:43,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257116228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:43,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:43,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:12:43,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774671729] [2023-11-19 05:12:43,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:43,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:43,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:43,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:43,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:43,426 INFO L87 Difference]: Start difference. First operand 3417 states and 5767 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:12:44,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:44,076 INFO L93 Difference]: Finished difference Result 4819 states and 7792 transitions. [2023-11-19 05:12:44,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:44,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2023-11-19 05:12:44,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:44,108 INFO L225 Difference]: With dead ends: 4819 [2023-11-19 05:12:44,108 INFO L226 Difference]: Without dead ends: 3913 [2023-11-19 05:12:44,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:44,114 INFO L413 NwaCegarLoop]: 3290 mSDtfsCounter, 79 mSDsluCounter, 3213 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 6503 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:44,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 6503 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:12:44,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3913 states. [2023-11-19 05:12:44,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3913 to 3757. [2023-11-19 05:12:44,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3757 states, 3407 states have (on average 1.7044320516583504) internal successors, (5807), 3417 states have internal predecessors, (5807), 244 states have call successors, (244), 104 states have call predecessors, (244), 104 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2023-11-19 05:12:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3757 states to 3757 states and 6295 transitions. [2023-11-19 05:12:44,310 INFO L78 Accepts]: Start accepts. Automaton has 3757 states and 6295 transitions. Word has length 95 [2023-11-19 05:12:44,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:44,311 INFO L495 AbstractCegarLoop]: Abstraction has 3757 states and 6295 transitions. [2023-11-19 05:12:44,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:12:44,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3757 states and 6295 transitions. [2023-11-19 05:12:44,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-19 05:12:44,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:44,323 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, 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] [2023-11-19 05:12:44,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:12:44,323 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:44,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:44,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1385932089, now seen corresponding path program 1 times [2023-11-19 05:12:44,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:44,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971265294] [2023-11-19 05:12:44,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:44,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-19 05:12:44,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:44,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971265294] [2023-11-19 05:12:44,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971265294] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:44,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:44,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:12:44,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220345812] [2023-11-19 05:12:44,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:44,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:44,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:44,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:44,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:44,448 INFO L87 Difference]: Start difference. First operand 3757 states and 6295 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:12:45,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:45,132 INFO L93 Difference]: Finished difference Result 7906 states and 12324 transitions. [2023-11-19 05:12:45,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:45,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2023-11-19 05:12:45,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:45,176 INFO L225 Difference]: With dead ends: 7906 [2023-11-19 05:12:45,177 INFO L226 Difference]: Without dead ends: 5795 [2023-11-19 05:12:45,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:45,187 INFO L413 NwaCegarLoop]: 3208 mSDtfsCounter, 3415 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3415 SdHoareTripleChecker+Valid, 3350 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:45,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3415 Valid, 3350 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:12:45,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5795 states. [2023-11-19 05:12:45,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5795 to 5769. [2023-11-19 05:12:45,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5769 states, 5091 states have (on average 1.6073462973875468) internal successors, (8183), 5109 states have internal predecessors, (8183), 468 states have call successors, (468), 208 states have call predecessors, (468), 208 states have return successors, (468), 452 states have call predecessors, (468), 468 states have call successors, (468) [2023-11-19 05:12:45,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 9119 transitions. [2023-11-19 05:12:45,480 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 9119 transitions. Word has length 128 [2023-11-19 05:12:45,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:45,481 INFO L495 AbstractCegarLoop]: Abstraction has 5769 states and 9119 transitions. [2023-11-19 05:12:45,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:12:45,482 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 9119 transitions. [2023-11-19 05:12:45,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-19 05:12:45,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:45,498 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, 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] [2023-11-19 05:12:45,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:12:45,498 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:45,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:45,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1493498242, now seen corresponding path program 1 times [2023-11-19 05:12:45,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:45,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079039767] [2023-11-19 05:12:45,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:45,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-19 05:12:45,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:45,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079039767] [2023-11-19 05:12:45,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079039767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:45,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:45,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:12:45,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56564776] [2023-11-19 05:12:45,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:45,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:45,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:45,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:45,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:45,613 INFO L87 Difference]: Start difference. First operand 5769 states and 9119 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:12:46,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:46,608 INFO L93 Difference]: Finished difference Result 13870 states and 20772 transitions. [2023-11-19 05:12:46,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:46,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2023-11-19 05:12:46,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:46,687 INFO L225 Difference]: With dead ends: 13870 [2023-11-19 05:12:46,687 INFO L226 Difference]: Without dead ends: 9747 [2023-11-19 05:12:46,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:46,705 INFO L413 NwaCegarLoop]: 3208 mSDtfsCounter, 3417 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3350 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:46,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3417 Valid, 3350 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:12:46,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9747 states. [2023-11-19 05:12:47,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9747 to 9697. [2023-11-19 05:12:47,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9697 states, 8379 states have (on average 1.5246449456975772) internal successors, (12775), 8413 states have internal predecessors, (12775), 900 states have call successors, (900), 416 states have call predecessors, (900), 416 states have return successors, (900), 868 states have call predecessors, (900), 900 states have call successors, (900) [2023-11-19 05:12:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9697 states to 9697 states and 14575 transitions. [2023-11-19 05:12:47,237 INFO L78 Accepts]: Start accepts. Automaton has 9697 states and 14575 transitions. Word has length 128 [2023-11-19 05:12:47,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:47,239 INFO L495 AbstractCegarLoop]: Abstraction has 9697 states and 14575 transitions. [2023-11-19 05:12:47,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:12:47,241 INFO L276 IsEmpty]: Start isEmpty. Operand 9697 states and 14575 transitions. [2023-11-19 05:12:47,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-19 05:12:47,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:47,272 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, 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] [2023-11-19 05:12:47,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:12:47,273 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:47,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:47,273 INFO L85 PathProgramCache]: Analyzing trace with hash 607412015, now seen corresponding path program 1 times [2023-11-19 05:12:47,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:47,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640501124] [2023-11-19 05:12:47,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:47,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-19 05:12:47,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:47,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640501124] [2023-11-19 05:12:47,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640501124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:47,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:47,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:12:47,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824581053] [2023-11-19 05:12:47,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:47,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:47,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:47,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:47,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:47,410 INFO L87 Difference]: Start difference. First operand 9697 states and 14575 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:12:48,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:48,536 INFO L93 Difference]: Finished difference Result 25510 states and 37076 transitions. [2023-11-19 05:12:48,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:48,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2023-11-19 05:12:48,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:48,604 INFO L225 Difference]: With dead ends: 25510 [2023-11-19 05:12:48,605 INFO L226 Difference]: Without dead ends: 17459 [2023-11-19 05:12:48,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:48,643 INFO L413 NwaCegarLoop]: 3226 mSDtfsCounter, 3420 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3420 SdHoareTripleChecker+Valid, 3368 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:48,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3420 Valid, 3368 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:12:48,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17459 states. [2023-11-19 05:12:49,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17459 to 17361. [2023-11-19 05:12:49,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17361 states, 14795 states have (on average 1.4625887124028387) internal successors, (21639), 14861 states have internal predecessors, (21639), 1732 states have call successors, (1732), 832 states have call predecessors, (1732), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2023-11-19 05:12:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17361 states to 17361 states and 25103 transitions. [2023-11-19 05:12:49,960 INFO L78 Accepts]: Start accepts. Automaton has 17361 states and 25103 transitions. Word has length 128 [2023-11-19 05:12:49,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:49,961 INFO L495 AbstractCegarLoop]: Abstraction has 17361 states and 25103 transitions. [2023-11-19 05:12:49,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:12:49,962 INFO L276 IsEmpty]: Start isEmpty. Operand 17361 states and 25103 transitions. [2023-11-19 05:12:50,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-19 05:12:50,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:50,057 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, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:50,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:12:50,058 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:50,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:50,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1353671447, now seen corresponding path program 1 times [2023-11-19 05:12:50,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:50,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352421511] [2023-11-19 05:12:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:50,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-19 05:12:50,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:50,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352421511] [2023-11-19 05:12:50,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352421511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:50,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879543987] [2023-11-19 05:12:50,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:50,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:50,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:50,479 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:50,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:12:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:50,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:12:50,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-19 05:12:50,789 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:50,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879543987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:50,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:50,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 05:12:50,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131429014] [2023-11-19 05:12:50,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:50,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:50,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:50,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:50,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:50,794 INFO L87 Difference]: Start difference. First operand 17361 states and 25103 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:12:52,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:52,357 INFO L93 Difference]: Finished difference Result 31669 states and 45425 transitions. [2023-11-19 05:12:52,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:52,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 149 [2023-11-19 05:12:52,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:52,480 INFO L225 Difference]: With dead ends: 31669 [2023-11-19 05:12:52,481 INFO L226 Difference]: Without dead ends: 23619 [2023-11-19 05:12:52,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:52,528 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 116 mSDsluCounter, 3214 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 6532 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:52,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 6532 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:12:52,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23619 states. [2023-11-19 05:12:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23619 to 20897. [2023-11-19 05:12:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20897 states, 18139 states have (on average 1.4769832956612823) internal successors, (26791), 18205 states have internal predecessors, (26791), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2023-11-19 05:12:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20897 states to 20897 states and 30447 transitions. [2023-11-19 05:12:54,201 INFO L78 Accepts]: Start accepts. Automaton has 20897 states and 30447 transitions. Word has length 149 [2023-11-19 05:12:54,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:54,202 INFO L495 AbstractCegarLoop]: Abstraction has 20897 states and 30447 transitions. [2023-11-19 05:12:54,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:12:54,202 INFO L276 IsEmpty]: Start isEmpty. Operand 20897 states and 30447 transitions. [2023-11-19 05:12:54,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-19 05:12:54,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:54,276 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, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:54,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:54,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:54,503 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:54,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:54,504 INFO L85 PathProgramCache]: Analyzing trace with hash 756205105, now seen corresponding path program 2 times [2023-11-19 05:12:54,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:54,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344303211] [2023-11-19 05:12:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:54,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-19 05:12:54,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:54,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344303211] [2023-11-19 05:12:54,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344303211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:54,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142679056] [2023-11-19 05:12:54,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:12:54,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:54,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:54,990 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:55,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d251d1ce-beeb-4f04-ad5c-a2cfdad59aeb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:12:55,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 05:12:55,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:12:55,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:12:55,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-19 05:12:55,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:55,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142679056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:55,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:55,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:12:55,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993139530] [2023-11-19 05:12:55,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:55,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:55,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:55,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:55,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:12:55,265 INFO L87 Difference]: Start difference. First operand 20897 states and 30447 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10)