./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.05.cil-1.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_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/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_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/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_6689df78-2230-470d-860e-25afdd11676f/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 d94a0143393d3950a5bf091072c53e220b7412d84326b758d723e55ee9dd42c8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:57:20,774 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:57:20,901 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:57:20,907 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:57:20,907 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:57:20,931 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:57:20,932 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:57:20,933 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:57:20,933 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:57:20,934 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:57:20,934 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:57:20,935 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:57:20,936 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:57:20,936 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:57:20,937 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:57:20,937 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:57:20,938 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:57:20,938 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:57:20,939 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:57:20,939 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:57:20,940 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:57:20,948 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:57:20,948 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:57:20,949 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:57:20,949 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:57:20,950 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:57:20,950 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:57:20,951 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:57:20,951 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:57:20,952 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:57:20,953 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:57:20,954 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:57:20,954 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:57:20,954 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:57:20,954 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:57:20,955 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:57:20,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:57:20,955 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:57:20,955 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:57:20,956 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:57:20,956 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:57:20,956 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:57:20,957 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:57:20,957 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:57:20,957 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:57:20,958 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_6689df78-2230-470d-860e-25afdd11676f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d94a0143393d3950a5bf091072c53e220b7412d84326b758d723e55ee9dd42c8 [2023-11-12 00:57:21,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:57:21,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:57:21,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:57:21,362 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:57:21,363 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:57:21,365 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.05.cil-1.c [2023-11-12 00:57:24,507 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:57:25,193 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:57:25,193 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/sv-benchmarks/c/combinations/Problem05_label48+token_ring.05.cil-1.c [2023-11-12 00:57:25,247 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/data/ec7ab8bb8/7130a69b539c41f592ec0e3c68566dc5/FLAGecb6d1a07 [2023-11-12 00:57:25,262 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/data/ec7ab8bb8/7130a69b539c41f592ec0e3c68566dc5 [2023-11-12 00:57:25,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:57:25,273 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:57:25,276 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:57:25,276 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:57:25,282 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:57:25,282 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:57:25" (1/1) ... [2023-11-12 00:57:25,283 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ac14c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:25, skipping insertion in model container [2023-11-12 00:57:25,283 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:57:25" (1/1) ... [2023-11-12 00:57:25,590 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:57:27,783 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_6689df78-2230-470d-860e-25afdd11676f/sv-benchmarks/c/combinations/Problem05_label48+token_ring.05.cil-1.c[375709,375722] [2023-11-12 00:57:27,821 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_6689df78-2230-470d-860e-25afdd11676f/sv-benchmarks/c/combinations/Problem05_label48+token_ring.05.cil-1.c[383339,383352] [2023-11-12 00:57:28,053 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:57:28,067 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:57:29,341 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_6689df78-2230-470d-860e-25afdd11676f/sv-benchmarks/c/combinations/Problem05_label48+token_ring.05.cil-1.c[375709,375722] [2023-11-12 00:57:29,388 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_6689df78-2230-470d-860e-25afdd11676f/sv-benchmarks/c/combinations/Problem05_label48+token_ring.05.cil-1.c[383339,383352] [2023-11-12 00:57:29,405 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:57:29,487 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:57:29,488 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:29 WrapperNode [2023-11-12 00:57:29,488 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:57:29,489 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:57:29,490 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:57:29,490 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:57:29,498 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:29" (1/1) ... [2023-11-12 00:57:29,620 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:29" (1/1) ... [2023-11-12 00:57:30,056 INFO L138 Inliner]: procedures = 54, calls = 56, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 12808 [2023-11-12 00:57:30,056 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:57:30,057 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:57:30,057 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:57:30,057 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:57:30,066 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:29" (1/1) ... [2023-11-12 00:57:30,067 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:29" (1/1) ... [2023-11-12 00:57:30,114 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:29" (1/1) ... [2023-11-12 00:57:30,115 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:29" (1/1) ... [2023-11-12 00:57:30,361 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:29" (1/1) ... [2023-11-12 00:57:30,414 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:29" (1/1) ... [2023-11-12 00:57:30,443 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:29" (1/1) ... [2023-11-12 00:57:30,469 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:29" (1/1) ... [2023-11-12 00:57:30,530 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:57:30,532 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:57:30,532 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:57:30,532 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:57:30,533 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:29" (1/1) ... [2023-11-12 00:57:30,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:57:30,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:30,602 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:57:30,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:57:30,639 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-12 00:57:30,639 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-12 00:57:30,641 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-12 00:57:30,641 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-12 00:57:30,642 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-12 00:57:30,642 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-12 00:57:30,642 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-12 00:57:30,642 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-12 00:57:30,643 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-12 00:57:30,643 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-12 00:57:30,643 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-12 00:57:30,643 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-12 00:57:30,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:57:30,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:57:30,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:57:30,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:57:30,782 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:57:30,785 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:57:40,559 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:57:42,743 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:57:42,743 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-12 00:57:42,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:57:42 BoogieIcfgContainer [2023-11-12 00:57:42,749 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:57:42,751 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:57:42,752 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:57:42,755 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:57:42,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:57:25" (1/3) ... [2023-11-12 00:57:42,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f9329f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:57:42, skipping insertion in model container [2023-11-12 00:57:42,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:29" (2/3) ... [2023-11-12 00:57:42,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f9329f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:57:42, skipping insertion in model container [2023-11-12 00:57:42,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:57:42" (3/3) ... [2023-11-12 00:57:42,841 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label48+token_ring.05.cil-1.c [2023-11-12 00:57:42,858 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:57:42,859 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 00:57:42,973 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:57:42,983 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;@37438e0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:57:42,983 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 00:57:42,999 INFO L276 IsEmpty]: Start isEmpty. Operand has 1760 states, 1732 states have (on average 1.9670900692840647) internal successors, (3407), 1735 states have internal predecessors, (3407), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-12 00:57:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 00:57:43,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:43,018 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] [2023-11-12 00:57:43,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:43,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:43,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1064664588, now seen corresponding path program 1 times [2023-11-12 00:57:43,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:43,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875334690] [2023-11-12 00:57:43,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:43,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:43,632 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 00:57:43,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:43,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875334690] [2023-11-12 00:57:43,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875334690] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:43,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:43,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:57:43,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750939689] [2023-11-12 00:57:43,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:43,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:57:43,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:43,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:57:43,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:57:43,687 INFO L87 Difference]: Start difference. First operand has 1760 states, 1732 states have (on average 1.9670900692840647) internal successors, (3407), 1735 states have internal predecessors, (3407), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 00:57:44,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:44,682 INFO L93 Difference]: Finished difference Result 3620 states and 7053 transitions. [2023-11-12 00:57:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:57:44,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 46 [2023-11-12 00:57:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:44,716 INFO L225 Difference]: With dead ends: 3620 [2023-11-12 00:57:44,716 INFO L226 Difference]: Without dead ends: 1859 [2023-11-12 00:57:44,728 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 00:57:44,733 INFO L413 NwaCegarLoop]: 3313 mSDtfsCounter, 3560 mSDsluCounter, 3243 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3560 SdHoareTripleChecker+Valid, 6556 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:44,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3560 Valid, 6556 Invalid, 628 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:57:44,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2023-11-12 00:57:44,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1858. [2023-11-12 00:57:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1810 states have (on average 1.938121546961326) internal successors, (3508), 1813 states have internal predecessors, (3508), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-12 00:57:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 3576 transitions. [2023-11-12 00:57:44,915 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 3576 transitions. Word has length 46 [2023-11-12 00:57:44,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:44,916 INFO L495 AbstractCegarLoop]: Abstraction has 1858 states and 3576 transitions. [2023-11-12 00:57:44,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 00:57:44,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 3576 transitions. [2023-11-12 00:57:44,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-12 00:57:44,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:44,924 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:57:44,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:57:44,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:44,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:44,925 INFO L85 PathProgramCache]: Analyzing trace with hash -119971008, now seen corresponding path program 1 times [2023-11-12 00:57:44,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:44,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590534819] [2023-11-12 00:57:44,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:44,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:57:45,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:45,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590534819] [2023-11-12 00:57:45,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590534819] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:45,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139747157] [2023-11-12 00:57:45,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:45,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:45,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:45,278 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:45,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:57:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:45,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:57:45,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:57:45,567 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:57:45,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139747157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:45,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:57:45,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:57:45,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566769429] [2023-11-12 00:57:45,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:45,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:57:45,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:45,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:57:45,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:57:45,575 INFO L87 Difference]: Start difference. First operand 1858 states and 3576 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 00:57:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:46,138 INFO L93 Difference]: Finished difference Result 2275 states and 4181 transitions. [2023-11-12 00:57:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:57:46,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 88 [2023-11-12 00:57:46,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:46,156 INFO L225 Difference]: With dead ends: 2275 [2023-11-12 00:57:46,157 INFO L226 Difference]: Without dead ends: 2063 [2023-11-12 00:57:46,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 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 00:57:46,161 INFO L413 NwaCegarLoop]: 3229 mSDtfsCounter, 3405 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3405 SdHoareTripleChecker+Valid, 3355 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:46,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3405 Valid, 3355 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:57:46,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2023-11-12 00:57:46,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 2059. [2023-11-12 00:57:46,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 1971 states have (on average 1.8939624556062913) internal successors, (3733), 1975 states have internal predecessors, (3733), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-12 00:57:46,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 3857 transitions. [2023-11-12 00:57:46,270 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 3857 transitions. Word has length 88 [2023-11-12 00:57:46,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:46,271 INFO L495 AbstractCegarLoop]: Abstraction has 2059 states and 3857 transitions. [2023-11-12 00:57:46,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 00:57:46,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 3857 transitions. [2023-11-12 00:57:46,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-12 00:57:46,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:46,279 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:57:46,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:57:46,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 00:57:46,497 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:46,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:46,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1658150658, now seen corresponding path program 1 times [2023-11-12 00:57:46,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:46,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768569023] [2023-11-12 00:57:46,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:46,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:57:46,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:46,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768569023] [2023-11-12 00:57:46,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768569023] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:46,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488435828] [2023-11-12 00:57:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:46,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:46,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:46,780 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:46,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:57:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:46,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:57:46,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 00:57:47,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:57:47,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488435828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:47,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:57:47,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:57:47,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439154556] [2023-11-12 00:57:47,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:47,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:57:47,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:47,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:57:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:57:47,029 INFO L87 Difference]: Start difference. First operand 2059 states and 3857 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 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 00:57:47,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:47,594 INFO L93 Difference]: Finished difference Result 2872 states and 5028 transitions. [2023-11-12 00:57:47,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:57:47,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 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 88 [2023-11-12 00:57:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:47,613 INFO L225 Difference]: With dead ends: 2872 [2023-11-12 00:57:47,614 INFO L226 Difference]: Without dead ends: 2459 [2023-11-12 00:57:47,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 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 00:57:47,618 INFO L413 NwaCegarLoop]: 3227 mSDtfsCounter, 3408 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3408 SdHoareTripleChecker+Valid, 3353 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:47,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3408 Valid, 3353 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:57:47,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2023-11-12 00:57:47,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2453. [2023-11-12 00:57:47,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2287 states have (on average 1.8237866200262352) internal successors, (4171), 2293 states have internal predecessors, (4171), 116 states have call successors, (116), 48 states have call predecessors, (116), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-12 00:57:47,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 4403 transitions. [2023-11-12 00:57:47,758 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 4403 transitions. Word has length 88 [2023-11-12 00:57:47,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:47,759 INFO L495 AbstractCegarLoop]: Abstraction has 2453 states and 4403 transitions. [2023-11-12 00:57:47,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 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 00:57:47,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 4403 transitions. [2023-11-12 00:57:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-12 00:57:47,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:47,764 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:57:47,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 00:57:47,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:47,993 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:47,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:47,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1732944512, now seen corresponding path program 1 times [2023-11-12 00:57:47,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:47,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560452120] [2023-11-12 00:57:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:48,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:57:48,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:48,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560452120] [2023-11-12 00:57:48,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560452120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:48,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943194384] [2023-11-12 00:57:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:48,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:48,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:48,243 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:48,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:57:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:48,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:57:48,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:57:48,492 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:57:48,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943194384] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:48,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:57:48,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:57:48,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841683565] [2023-11-12 00:57:48,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:48,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:57:48,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:48,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:57:48,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:57:48,496 INFO L87 Difference]: Start difference. First operand 2453 states and 4403 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 00:57:49,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:49,231 INFO L93 Difference]: Finished difference Result 4042 states and 6672 transitions. [2023-11-12 00:57:49,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:57:49,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 88 [2023-11-12 00:57:49,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:49,254 INFO L225 Difference]: With dead ends: 4042 [2023-11-12 00:57:49,255 INFO L226 Difference]: Without dead ends: 3235 [2023-11-12 00:57:49,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 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 00:57:49,259 INFO L413 NwaCegarLoop]: 3190 mSDtfsCounter, 3399 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3399 SdHoareTripleChecker+Valid, 3316 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:49,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3399 Valid, 3316 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:57:49,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2023-11-12 00:57:49,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 3225. [2023-11-12 00:57:49,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 2907 states have (on average 1.7278981768145856) internal successors, (5023), 2917 states have internal predecessors, (5023), 220 states have call successors, (220), 96 states have call predecessors, (220), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2023-11-12 00:57:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 5463 transitions. [2023-11-12 00:57:49,418 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 5463 transitions. Word has length 88 [2023-11-12 00:57:49,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:49,419 INFO L495 AbstractCegarLoop]: Abstraction has 3225 states and 5463 transitions. [2023-11-12 00:57:49,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 00:57:49,420 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 5463 transitions. [2023-11-12 00:57:49,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-12 00:57:49,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:49,433 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:57:49,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 00:57:49,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:49,639 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:49,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:49,640 INFO L85 PathProgramCache]: Analyzing trace with hash -103512386, now seen corresponding path program 1 times [2023-11-12 00:57:49,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:49,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284568163] [2023-11-12 00:57:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:49,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-12 00:57:49,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:49,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284568163] [2023-11-12 00:57:49,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284568163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:49,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:49,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:57:49,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456152072] [2023-11-12 00:57:49,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:49,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:57:49,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:49,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:57:49,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:57:49,746 INFO L87 Difference]: Start difference. First operand 3225 states and 5463 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:57:50,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:50,351 INFO L93 Difference]: Finished difference Result 4475 states and 7240 transitions. [2023-11-12 00:57:50,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:57:50,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 88 [2023-11-12 00:57:50,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:50,377 INFO L225 Difference]: With dead ends: 4475 [2023-11-12 00:57:50,378 INFO L226 Difference]: Without dead ends: 3665 [2023-11-12 00:57:50,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:57:50,383 INFO L413 NwaCegarLoop]: 3264 mSDtfsCounter, 69 mSDsluCounter, 3196 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 6460 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:50,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 6460 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:57:50,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2023-11-12 00:57:50,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 3517. [2023-11-12 00:57:50,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3517 states, 3183 states have (on average 1.7137920201068175) internal successors, (5455), 3193 states have internal predecessors, (5455), 228 states have call successors, (228), 104 states have call predecessors, (228), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2023-11-12 00:57:50,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3517 states to 3517 states and 5911 transitions. [2023-11-12 00:57:50,536 INFO L78 Accepts]: Start accepts. Automaton has 3517 states and 5911 transitions. Word has length 88 [2023-11-12 00:57:50,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:50,537 INFO L495 AbstractCegarLoop]: Abstraction has 3517 states and 5911 transitions. [2023-11-12 00:57:50,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:57:50,537 INFO L276 IsEmpty]: Start isEmpty. Operand 3517 states and 5911 transitions. [2023-11-12 00:57:50,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-12 00:57:50,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:50,545 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:50,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:57:50,546 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:50,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:50,546 INFO L85 PathProgramCache]: Analyzing trace with hash -759968520, now seen corresponding path program 1 times [2023-11-12 00:57:50,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:50,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550268602] [2023-11-12 00:57:50,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:50,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-12 00:57:50,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:50,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550268602] [2023-11-12 00:57:50,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550268602] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:50,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:50,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:57:50,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093250360] [2023-11-12 00:57:50,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:50,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:57:50,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:50,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:57:50,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:57:50,645 INFO L87 Difference]: Start difference. First operand 3517 states and 5911 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:57:51,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:51,208 INFO L93 Difference]: Finished difference Result 7186 states and 11156 transitions. [2023-11-12 00:57:51,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:57:51,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 118 [2023-11-12 00:57:51,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:51,245 INFO L225 Difference]: With dead ends: 7186 [2023-11-12 00:57:51,245 INFO L226 Difference]: Without dead ends: 5315 [2023-11-12 00:57:51,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:57:51,254 INFO L413 NwaCegarLoop]: 3192 mSDtfsCounter, 3398 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3398 SdHoareTripleChecker+Valid, 3318 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:51,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3398 Valid, 3318 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:57:51,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5315 states. [2023-11-12 00:57:51,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5315 to 5289. [2023-11-12 00:57:51,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5289 states, 4643 states have (on average 1.6108119750161534) internal successors, (7479), 4661 states have internal predecessors, (7479), 436 states have call successors, (436), 208 states have call predecessors, (436), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2023-11-12 00:57:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5289 states to 5289 states and 8351 transitions. [2023-11-12 00:57:51,492 INFO L78 Accepts]: Start accepts. Automaton has 5289 states and 8351 transitions. Word has length 118 [2023-11-12 00:57:51,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:51,495 INFO L495 AbstractCegarLoop]: Abstraction has 5289 states and 8351 transitions. [2023-11-12 00:57:51,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:57:51,495 INFO L276 IsEmpty]: Start isEmpty. Operand 5289 states and 8351 transitions. [2023-11-12 00:57:51,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-12 00:57:51,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:51,509 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:51,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:57:51,510 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:51,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:51,510 INFO L85 PathProgramCache]: Analyzing trace with hash 122334865, now seen corresponding path program 1 times [2023-11-12 00:57:51,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:51,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824772482] [2023-11-12 00:57:51,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:51,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-12 00:57:51,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:51,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824772482] [2023-11-12 00:57:51,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824772482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:51,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:51,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:57:51,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870999932] [2023-11-12 00:57:51,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:51,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:57:51,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:51,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:57:51,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:57:51,597 INFO L87 Difference]: Start difference. First operand 5289 states and 8351 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:57:52,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:52,451 INFO L93 Difference]: Finished difference Result 12430 states and 18436 transitions. [2023-11-12 00:57:52,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:57:52,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 118 [2023-11-12 00:57:52,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:52,506 INFO L225 Difference]: With dead ends: 12430 [2023-11-12 00:57:52,507 INFO L226 Difference]: Without dead ends: 8787 [2023-11-12 00:57:52,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:57:52,521 INFO L413 NwaCegarLoop]: 3210 mSDtfsCounter, 3401 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3401 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:52,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3401 Valid, 3336 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:57:52,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8787 states. [2023-11-12 00:57:52,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8787 to 8737. [2023-11-12 00:57:52,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8737 states, 7483 states have (on average 1.5190431645062141) internal successors, (11367), 7517 states have internal predecessors, (11367), 836 states have call successors, (836), 416 states have call predecessors, (836), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2023-11-12 00:57:52,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8737 states to 8737 states and 13039 transitions. [2023-11-12 00:57:52,921 INFO L78 Accepts]: Start accepts. Automaton has 8737 states and 13039 transitions. Word has length 118 [2023-11-12 00:57:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:52,922 INFO L495 AbstractCegarLoop]: Abstraction has 8737 states and 13039 transitions. [2023-11-12 00:57:52,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:57:52,923 INFO L276 IsEmpty]: Start isEmpty. Operand 8737 states and 13039 transitions. [2023-11-12 00:57:52,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-12 00:57:52,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:52,952 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2023-11-12 00:57:52,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:57:52,952 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:52,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:52,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1090494167, now seen corresponding path program 1 times [2023-11-12 00:57:52,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:52,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313960138] [2023-11-12 00:57:52,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:52,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-12 00:57:53,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:53,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313960138] [2023-11-12 00:57:53,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313960138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:53,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005238933] [2023-11-12 00:57:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:53,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:53,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:53,108 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:53,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:57:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:53,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:57:53,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 00:57:53,371 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:57:53,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005238933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:53,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:57:53,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-12 00:57:53,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961633170] [2023-11-12 00:57:53,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:53,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:57:53,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:53,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:57:53,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:57:53,375 INFO L87 Difference]: Start difference. First operand 8737 states and 13039 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-12 00:57:54,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:54,335 INFO L93 Difference]: Finished difference Result 15093 states and 21969 transitions. [2023-11-12 00:57:54,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:57:54,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 138 [2023-11-12 00:57:54,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:54,386 INFO L225 Difference]: With dead ends: 15093 [2023-11-12 00:57:54,386 INFO L226 Difference]: Without dead ends: 11475 [2023-11-12 00:57:54,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:57:54,399 INFO L413 NwaCegarLoop]: 3287 mSDtfsCounter, 100 mSDsluCounter, 3197 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6484 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:54,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 6484 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:57:54,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11475 states. [2023-11-12 00:57:54,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11475 to 10241. [2023-11-12 00:57:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10241 states, 8891 states have (on average 1.5196265886851872) internal successors, (13511), 8925 states have internal predecessors, (13511), 884 states have call successors, (884), 464 states have call predecessors, (884), 464 states have return successors, (884), 852 states have call predecessors, (884), 884 states have call successors, (884) [2023-11-12 00:57:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10241 states to 10241 states and 15279 transitions. [2023-11-12 00:57:54,894 INFO L78 Accepts]: Start accepts. Automaton has 10241 states and 15279 transitions. Word has length 138 [2023-11-12 00:57:54,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:54,896 INFO L495 AbstractCegarLoop]: Abstraction has 10241 states and 15279 transitions. [2023-11-12 00:57:54,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-12 00:57:54,897 INFO L276 IsEmpty]: Start isEmpty. Operand 10241 states and 15279 transitions. [2023-11-12 00:57:54,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-12 00:57:54,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:54,930 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2023-11-12 00:57:54,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:57:55,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:55,138 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:55,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:55,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1594945912, now seen corresponding path program 2 times [2023-11-12 00:57:55,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:55,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171249826] [2023-11-12 00:57:55,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:55,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-12 00:57:55,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:55,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171249826] [2023-11-12 00:57:55,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171249826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:55,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345411823] [2023-11-12 00:57:55,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:57:55,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:55,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:55,541 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:55,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6689df78-2230-470d-860e-25afdd11676f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:57:55,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:57:55,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:57:55,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 00:57:55,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 63 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:57:56,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:57:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-12 00:57:56,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345411823] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:57:56,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [681696299] [2023-11-12 00:57:56,497 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2023-11-12 00:57:56,498 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:57:56,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:57:56,507 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:57:56,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs