./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.13.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX --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 ec1cd52a445477adf7d2011977810418f8e00abf9d0587e75a609261005f64da --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:10:41,923 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:10:41,994 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:10:41,999 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:10:42,004 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:10:42,043 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:10:42,044 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:10:42,045 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:10:42,046 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:10:42,051 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:10:42,051 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:10:42,052 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:10:42,053 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:10:42,055 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:10:42,055 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:10:42,056 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:10:42,056 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:10:42,057 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:10:42,057 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:10:42,058 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:10:42,058 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:10:42,059 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:10:42,060 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:10:42,061 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:10:42,061 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:10:42,061 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:10:42,062 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:10:42,063 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:10:42,063 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:10:42,064 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:10:42,065 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:10:42,065 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:10:42,066 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:10:42,066 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:10:42,066 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:10:42,067 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:10:42,067 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:10:42,067 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:10:42,068 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:10:42,068 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:10:42,068 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:10:42,069 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:10:42,069 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:10:42,069 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:10:42,070 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:10:42,070 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_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec1cd52a445477adf7d2011977810418f8e00abf9d0587e75a609261005f64da [2023-11-12 00:10:42,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:10:42,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:10:42,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:10:42,427 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:10:42,428 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:10:42,431 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.13.cil-2.c [2023-11-12 00:10:45,868 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:10:46,646 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:10:46,647 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/sv-benchmarks/c/combinations/Problem05_label45+token_ring.13.cil-2.c [2023-11-12 00:10:46,718 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/data/4e3ff2c85/3bafa4ff77484be8b7772cd36eb0918b/FLAG60e76b095 [2023-11-12 00:10:46,740 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/data/4e3ff2c85/3bafa4ff77484be8b7772cd36eb0918b [2023-11-12 00:10:46,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:10:46,752 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:10:46,757 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:10:46,757 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:10:46,764 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:10:46,765 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:10:46" (1/1) ... [2023-11-12 00:10:46,766 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722e658d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:46, skipping insertion in model container [2023-11-12 00:10:46,767 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:10:46" (1/1) ... [2023-11-12 00:10:47,092 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:10:49,592 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_959bc5f1-99f7-4d3f-89d3-27fa284919f3/sv-benchmarks/c/combinations/Problem05_label45+token_ring.13.cil-2.c[380323,380336] [2023-11-12 00:10:49,634 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_959bc5f1-99f7-4d3f-89d3-27fa284919f3/sv-benchmarks/c/combinations/Problem05_label45+token_ring.13.cil-2.c[383339,383352] [2023-11-12 00:10:50,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:10:50,181 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:10:51,721 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_959bc5f1-99f7-4d3f-89d3-27fa284919f3/sv-benchmarks/c/combinations/Problem05_label45+token_ring.13.cil-2.c[380323,380336] [2023-11-12 00:10:51,730 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_959bc5f1-99f7-4d3f-89d3-27fa284919f3/sv-benchmarks/c/combinations/Problem05_label45+token_ring.13.cil-2.c[383339,383352] [2023-11-12 00:10:51,774 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:10:51,859 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:10:51,860 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:51 WrapperNode [2023-11-12 00:10:51,860 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:10:51,861 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:10:51,861 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:10:51,861 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:10:51,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:51" (1/1) ... [2023-11-12 00:10:51,974 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:51" (1/1) ... [2023-11-12 00:10:52,418 INFO L138 Inliner]: procedures = 70, calls = 80, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 13288 [2023-11-12 00:10:52,418 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:10:52,419 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:10:52,419 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:10:52,419 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:10:52,429 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:51" (1/1) ... [2023-11-12 00:10:52,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:51" (1/1) ... [2023-11-12 00:10:52,588 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:51" (1/1) ... [2023-11-12 00:10:52,588 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:51" (1/1) ... [2023-11-12 00:10:52,712 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:51" (1/1) ... [2023-11-12 00:10:52,755 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:51" (1/1) ... [2023-11-12 00:10:52,777 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:51" (1/1) ... [2023-11-12 00:10:52,799 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:51" (1/1) ... [2023-11-12 00:10:52,861 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:10:52,862 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:10:52,862 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:10:52,862 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:10:52,863 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:51" (1/1) ... [2023-11-12 00:10:52,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:10:52,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:52,899 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:10:52,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:10:52,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:10:52,949 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-12 00:10:52,949 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-12 00:10:52,949 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-12 00:10:52,949 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-12 00:10:52,950 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-12 00:10:52,950 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-12 00:10:52,950 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-12 00:10:52,950 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-12 00:10:52,951 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-12 00:10:52,951 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-12 00:10:52,951 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-12 00:10:52,951 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-12 00:10:52,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:10:52,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:10:52,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:10:53,262 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:10:53,264 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:11:05,102 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:11:08,880 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:11:08,880 INFO L302 CfgBuilder]: Removed 17 assume(true) statements. [2023-11-12 00:11:08,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:11:08 BoogieIcfgContainer [2023-11-12 00:11:08,885 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:11:08,888 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:11:08,888 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:11:08,891 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:11:08,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:10:46" (1/3) ... [2023-11-12 00:11:08,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60db83e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:11:08, skipping insertion in model container [2023-11-12 00:11:08,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:51" (2/3) ... [2023-11-12 00:11:08,897 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60db83e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:11:08, skipping insertion in model container [2023-11-12 00:11:08,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:11:08" (3/3) ... [2023-11-12 00:11:08,899 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.13.cil-2.c [2023-11-12 00:11:08,921 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:11:08,921 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 00:11:09,034 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:11:09,042 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;@232ceece, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:11:09,042 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 00:11:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand has 1856 states, 1820 states have (on average 1.9467032967032967) internal successors, (3543), 1823 states have internal predecessors, (3543), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-12 00:11:09,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:11:09,077 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:09,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:09,079 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:09,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:09,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1318682067, now seen corresponding path program 1 times [2023-11-12 00:11:09,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:09,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518981332] [2023-11-12 00:11:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:09,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:11:09,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:09,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518981332] [2023-11-12 00:11:09,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518981332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:09,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:09,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:11:09,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280407406] [2023-11-12 00:11:09,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:09,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:11:09,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:09,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:11:09,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:11:09,916 INFO L87 Difference]: Start difference. First operand has 1856 states, 1820 states have (on average 1.9467032967032967) internal successors, (3543), 1823 states have internal predecessors, (3543), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2023-11-12 00:11:11,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:11,161 INFO L93 Difference]: Finished difference Result 3908 states and 7525 transitions. [2023-11-12 00:11:11,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:11:11,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 70 [2023-11-12 00:11:11,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:11,198 INFO L225 Difference]: With dead ends: 3908 [2023-11-12 00:11:11,198 INFO L226 Difference]: Without dead ends: 2051 [2023-11-12 00:11:11,211 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 [2023-11-12 00:11:11,218 INFO L413 NwaCegarLoop]: 3569 mSDtfsCounter, 3840 mSDsluCounter, 3467 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3840 SdHoareTripleChecker+Valid, 7036 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:11,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3840 Valid, 7036 Invalid, 756 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:11:11,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2023-11-12 00:11:11,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 2050. [2023-11-12 00:11:11,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 1986 states have (on average 1.903323262839879) internal successors, (3780), 1989 states have internal predecessors, (3780), 50 states have call successors, (50), 12 states have call predecessors, (50), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-12 00:11:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 3880 transitions. [2023-11-12 00:11:11,437 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 3880 transitions. Word has length 70 [2023-11-12 00:11:11,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:11,437 INFO L495 AbstractCegarLoop]: Abstraction has 2050 states and 3880 transitions. [2023-11-12 00:11:11,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2023-11-12 00:11:11,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 3880 transitions. [2023-11-12 00:11:11,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-12 00:11:11,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:11,456 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 00:11:11,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:11:11,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:11,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:11,458 INFO L85 PathProgramCache]: Analyzing trace with hash -9563410, now seen corresponding path program 1 times [2023-11-12 00:11:11,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:11,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773428571] [2023-11-12 00:11:11,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:11,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:11:12,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:12,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773428571] [2023-11-12 00:11:12,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773428571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:12,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839369822] [2023-11-12 00:11:12,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:12,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:12,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:12,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:12,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:11:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:12,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:11:12,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 00:11:12,481 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:12,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839369822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:12,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:11:12,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:11:12,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009217443] [2023-11-12 00:11:12,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:12,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:12,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:12,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:12,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:11:12,486 INFO L87 Difference]: Start difference. First operand 2050 states and 3880 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 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) [2023-11-12 00:11:13,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:13,140 INFO L93 Difference]: Finished difference Result 2851 states and 5109 transitions. [2023-11-12 00:11:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:13,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 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 144 [2023-11-12 00:11:13,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:13,160 INFO L225 Difference]: With dead ends: 2851 [2023-11-12 00:11:13,160 INFO L226 Difference]: Without dead ends: 2447 [2023-11-12 00:11:13,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:11:13,165 INFO L413 NwaCegarLoop]: 3373 mSDtfsCounter, 3539 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3539 SdHoareTripleChecker+Valid, 3627 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:13,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3539 Valid, 3627 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:11:13,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2023-11-12 00:11:13,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2443. [2023-11-12 00:11:13,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2443 states, 2323 states have (on average 1.8411536805854498) internal successors, (4277), 2327 states have internal predecessors, (4277), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2023-11-12 00:11:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 4465 transitions. [2023-11-12 00:11:13,280 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 4465 transitions. Word has length 144 [2023-11-12 00:11:13,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:13,282 INFO L495 AbstractCegarLoop]: Abstraction has 2443 states and 4465 transitions. [2023-11-12 00:11:13,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 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) [2023-11-12 00:11:13,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 4465 transitions. [2023-11-12 00:11:13,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-12 00:11:13,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:13,292 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 00:11:13,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:13,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:13,500 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:13,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:13,501 INFO L85 PathProgramCache]: Analyzing trace with hash -996245716, now seen corresponding path program 1 times [2023-11-12 00:11:13,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:13,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905444317] [2023-11-12 00:11:13,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:13,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:11:13,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:13,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905444317] [2023-11-12 00:11:13,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905444317] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:13,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796766829] [2023-11-12 00:11:13,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:13,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:13,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:13,758 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:13,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:11:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:14,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:11:14,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 00:11:14,146 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:14,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796766829] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:14,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:11:14,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:11:14,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161648506] [2023-11-12 00:11:14,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:14,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:14,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:14,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:14,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:11:14,151 INFO L87 Difference]: Start difference. First operand 2443 states and 4465 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 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) [2023-11-12 00:11:14,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:14,808 INFO L93 Difference]: Finished difference Result 4024 states and 6884 transitions. [2023-11-12 00:11:14,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:14,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 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 144 [2023-11-12 00:11:14,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:14,831 INFO L225 Difference]: With dead ends: 4024 [2023-11-12 00:11:14,831 INFO L226 Difference]: Without dead ends: 3227 [2023-11-12 00:11:14,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:11:14,837 INFO L413 NwaCegarLoop]: 3371 mSDtfsCounter, 3551 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3551 SdHoareTripleChecker+Valid, 3625 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:14,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3551 Valid, 3625 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:11:14,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2023-11-12 00:11:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 3221. [2023-11-12 00:11:14,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3221 states, 2991 states have (on average 1.7582748244734203) internal successors, (5259), 2997 states have internal predecessors, (5259), 180 states have call successors, (180), 48 states have call predecessors, (180), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2023-11-12 00:11:14,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3221 states to 3221 states and 5619 transitions. [2023-11-12 00:11:14,990 INFO L78 Accepts]: Start accepts. Automaton has 3221 states and 5619 transitions. Word has length 144 [2023-11-12 00:11:14,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:14,991 INFO L495 AbstractCegarLoop]: Abstraction has 3221 states and 5619 transitions. [2023-11-12 00:11:14,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 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) [2023-11-12 00:11:14,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3221 states and 5619 transitions. [2023-11-12 00:11:14,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-12 00:11:14,998 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:14,998 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 00:11:15,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:15,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:15,208 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:15,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:15,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1279819370, now seen corresponding path program 1 times [2023-11-12 00:11:15,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:15,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254805868] [2023-11-12 00:11:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:15,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:11:15,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:15,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254805868] [2023-11-12 00:11:15,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254805868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:15,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575759827] [2023-11-12 00:11:15,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:15,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:15,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:15,451 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:15,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:11:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:15,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:11:15,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-12 00:11:15,915 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:15,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575759827] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:15,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:11:15,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:11:15,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373240013] [2023-11-12 00:11:15,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:15,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:15,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:15,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:15,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:11:15,918 INFO L87 Difference]: Start difference. First operand 3221 states and 5619 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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) [2023-11-12 00:11:16,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:16,589 INFO L93 Difference]: Finished difference Result 6346 states and 10384 transitions. [2023-11-12 00:11:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:16,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 144 [2023-11-12 00:11:16,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:16,622 INFO L225 Difference]: With dead ends: 6346 [2023-11-12 00:11:16,623 INFO L226 Difference]: Without dead ends: 4771 [2023-11-12 00:11:16,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:11:16,631 INFO L413 NwaCegarLoop]: 3351 mSDtfsCounter, 3557 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3557 SdHoareTripleChecker+Valid, 3605 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:16,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3557 Valid, 3605 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:11:16,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4771 states. [2023-11-12 00:11:16,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4771 to 4761. [2023-11-12 00:11:16,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4761 states, 4315 states have (on average 1.6683661645422942) internal successors, (7199), 4325 states have internal predecessors, (7199), 348 states have call successors, (348), 96 states have call predecessors, (348), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2023-11-12 00:11:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4761 states to 4761 states and 7895 transitions. [2023-11-12 00:11:16,841 INFO L78 Accepts]: Start accepts. Automaton has 4761 states and 7895 transitions. Word has length 144 [2023-11-12 00:11:16,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:16,841 INFO L495 AbstractCegarLoop]: Abstraction has 4761 states and 7895 transitions. [2023-11-12 00:11:16,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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) [2023-11-12 00:11:16,842 INFO L276 IsEmpty]: Start isEmpty. Operand 4761 states and 7895 transitions. [2023-11-12 00:11:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-12 00:11:16,852 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:16,853 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 00:11:16,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:17,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:17,061 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:17,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:17,062 INFO L85 PathProgramCache]: Analyzing trace with hash -705063128, now seen corresponding path program 1 times [2023-11-12 00:11:17,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:17,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50770558] [2023-11-12 00:11:17,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:17,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:11:17,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:17,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50770558] [2023-11-12 00:11:17,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50770558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:17,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789272245] [2023-11-12 00:11:17,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:17,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:17,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:17,277 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:17,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:11:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:17,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:11:17,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 00:11:17,637 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:17,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789272245] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:17,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:11:17,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:11:17,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446720748] [2023-11-12 00:11:17,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:17,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:17,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:17,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:17,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:11:17,640 INFO L87 Difference]: Start difference. First operand 4761 states and 7895 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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) [2023-11-12 00:11:18,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:18,395 INFO L93 Difference]: Finished difference Result 10942 states and 17284 transitions. [2023-11-12 00:11:18,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:18,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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 144 [2023-11-12 00:11:18,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:18,448 INFO L225 Difference]: With dead ends: 10942 [2023-11-12 00:11:18,448 INFO L226 Difference]: Without dead ends: 7827 [2023-11-12 00:11:18,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:11:18,463 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3545 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3545 SdHoareTripleChecker+Valid, 3572 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:18,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3545 Valid, 3572 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:11:18,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7827 states. [2023-11-12 00:11:18,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7827 to 7809. [2023-11-12 00:11:18,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7809 states, 6939 states have (on average 1.5897103329009943) internal successors, (11031), 6957 states have internal predecessors, (11031), 676 states have call successors, (676), 192 states have call predecessors, (676), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2023-11-12 00:11:18,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7809 states to 7809 states and 12383 transitions. [2023-11-12 00:11:18,993 INFO L78 Accepts]: Start accepts. Automaton has 7809 states and 12383 transitions. Word has length 144 [2023-11-12 00:11:18,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:18,993 INFO L495 AbstractCegarLoop]: Abstraction has 7809 states and 12383 transitions. [2023-11-12 00:11:18,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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) [2023-11-12 00:11:18,995 INFO L276 IsEmpty]: Start isEmpty. Operand 7809 states and 12383 transitions. [2023-11-12 00:11:19,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-12 00:11:19,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:19,016 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 00:11:19,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-12 00:11:19,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:19,225 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:19,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:19,225 INFO L85 PathProgramCache]: Analyzing trace with hash -404005658, now seen corresponding path program 1 times [2023-11-12 00:11:19,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:19,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971350238] [2023-11-12 00:11:19,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:19,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:11:19,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:19,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971350238] [2023-11-12 00:11:19,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971350238] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:19,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637300978] [2023-11-12 00:11:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:19,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:19,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:19,485 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:19,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:11:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:19,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:11:19,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-12 00:11:19,822 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:19,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637300978] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:19,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:11:19,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:11:19,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897725169] [2023-11-12 00:11:19,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:19,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:19,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:19,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:19,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:11:19,825 INFO L87 Difference]: Start difference. First operand 7809 states and 12383 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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) [2023-11-12 00:11:20,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:20,810 INFO L93 Difference]: Finished difference Result 20038 states and 30884 transitions. [2023-11-12 00:11:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:20,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 144 [2023-11-12 00:11:20,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:20,891 INFO L225 Difference]: With dead ends: 20038 [2023-11-12 00:11:20,891 INFO L226 Difference]: Without dead ends: 13875 [2023-11-12 00:11:20,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:11:20,926 INFO L413 NwaCegarLoop]: 3365 mSDtfsCounter, 3560 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3560 SdHoareTripleChecker+Valid, 3619 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:20,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3560 Valid, 3619 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:11:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13875 states. [2023-11-12 00:11:21,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13875 to 13841. [2023-11-12 00:11:21,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13841 states, 12139 states have (on average 1.5321690419309664) internal successors, (18599), 12173 states have internal predecessors, (18599), 1316 states have call successors, (1316), 384 states have call predecessors, (1316), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2023-11-12 00:11:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13841 states to 13841 states and 21231 transitions. [2023-11-12 00:11:21,706 INFO L78 Accepts]: Start accepts. Automaton has 13841 states and 21231 transitions. Word has length 144 [2023-11-12 00:11:21,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:21,706 INFO L495 AbstractCegarLoop]: Abstraction has 13841 states and 21231 transitions. [2023-11-12 00:11:21,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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) [2023-11-12 00:11:21,707 INFO L276 IsEmpty]: Start isEmpty. Operand 13841 states and 21231 transitions. [2023-11-12 00:11:21,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-12 00:11:21,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:21,740 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 00:11:21,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:21,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:21,948 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:21,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:21,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1071227752, now seen corresponding path program 1 times [2023-11-12 00:11:21,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:21,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590694153] [2023-11-12 00:11:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:21,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:21,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:11:22,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:22,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590694153] [2023-11-12 00:11:22,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590694153] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:22,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011073615] [2023-11-12 00:11:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:22,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:22,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:22,201 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:22,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:11:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:22,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:11:22,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:11:22,588 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:22,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011073615] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:22,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:11:22,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:11:22,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362876590] [2023-11-12 00:11:22,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:22,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:22,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:22,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:22,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:11:22,594 INFO L87 Difference]: Start difference. First operand 13841 states and 21231 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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) [2023-11-12 00:11:23,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:23,934 INFO L93 Difference]: Finished difference Result 38038 states and 57684 transitions. [2023-11-12 00:11:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:23,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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 144 [2023-11-12 00:11:23,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:24,060 INFO L225 Difference]: With dead ends: 38038 [2023-11-12 00:11:24,061 INFO L226 Difference]: Without dead ends: 25843 [2023-11-12 00:11:24,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:11:24,119 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3530 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3530 SdHoareTripleChecker+Valid, 3572 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:24,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3530 Valid, 3572 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:11:24,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25843 states. [2023-11-12 00:11:25,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25843 to 25777. [2023-11-12 00:11:25,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25777 states, 22443 states have (on average 1.494586285255982) internal successors, (33543), 22509 states have internal predecessors, (33543), 2564 states have call successors, (2564), 768 states have call predecessors, (2564), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2023-11-12 00:11:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25777 states to 25777 states and 38671 transitions. [2023-11-12 00:11:25,397 INFO L78 Accepts]: Start accepts. Automaton has 25777 states and 38671 transitions. Word has length 144 [2023-11-12 00:11:25,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:25,398 INFO L495 AbstractCegarLoop]: Abstraction has 25777 states and 38671 transitions. [2023-11-12 00:11:25,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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) [2023-11-12 00:11:25,398 INFO L276 IsEmpty]: Start isEmpty. Operand 25777 states and 38671 transitions. [2023-11-12 00:11:25,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-12 00:11:25,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:25,464 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 00:11:25,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:25,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:25,671 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:25,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:25,672 INFO L85 PathProgramCache]: Analyzing trace with hash 335075690, now seen corresponding path program 1 times [2023-11-12 00:11:25,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:25,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452402243] [2023-11-12 00:11:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:25,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:11:25,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:25,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452402243] [2023-11-12 00:11:25,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452402243] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:25,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485704537] [2023-11-12 00:11:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:25,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:25,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:25,983 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:26,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959bc5f1-99f7-4d3f-89d3-27fa284919f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process