./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje --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 1d1a303ac3a0660bf920920173d22fca6c20b09d575ad3b8f2f9d91205d4f1f6 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:06:00,936 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:06:01,038 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:06:01,046 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:06:01,047 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:06:01,105 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:06:01,106 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:06:01,106 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:06:01,107 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:06:01,108 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:06:01,108 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:06:01,109 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:06:01,109 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:06:01,111 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:06:01,111 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:06:01,112 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:06:01,112 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:06:01,113 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:06:01,113 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:06:01,114 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:06:01,114 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:06:01,115 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:06:01,115 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:06:01,116 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:06:01,116 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:06:01,117 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:06:01,117 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:06:01,118 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:06:01,118 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:06:01,119 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:06:01,119 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:06:01,119 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:06:01,120 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:06:01,120 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:06:01,120 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:06:01,121 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:06:01,135 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:06:01,136 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:06:01,136 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:06:01,137 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:06:01,137 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:06:01,137 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:06:01,137 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:06:01,138 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:06:01,138 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:06:01,138 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:06:01,139 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:06:01,139 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_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d1a303ac3a0660bf920920173d22fca6c20b09d575ad3b8f2f9d91205d4f1f6 [2024-11-09 05:06:01,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:06:01,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:06:01,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:06:01,537 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:06:01,538 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:06:01,539 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i Unable to find full path for "g++" [2024-11-09 05:06:03,611 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:06:03,841 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:06:03,842 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2024-11-09 05:06:03,851 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/data/a71e1d224/fae8ae63364344dd9c478c985140a5da/FLAGaf8ee2537 [2024-11-09 05:06:03,879 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/data/a71e1d224/fae8ae63364344dd9c478c985140a5da [2024-11-09 05:06:03,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:06:03,883 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:06:03,885 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:06:03,885 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:06:03,890 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:06:03,891 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:06:03" (1/1) ... [2024-11-09 05:06:03,892 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67ad99d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:03, skipping insertion in model container [2024-11-09 05:06:03,892 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:06:03" (1/1) ... [2024-11-09 05:06:03,931 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:06:04,147 WARN L250 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_0a21c884-3620-4ebf-92ec-e0a93e30a770/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i[896,909] [2024-11-09 05:06:04,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:06:04,180 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:06:04,196 WARN L250 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_0a21c884-3620-4ebf-92ec-e0a93e30a770/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i[896,909] [2024-11-09 05:06:04,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:06:04,223 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:06:04,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:04 WrapperNode [2024-11-09 05:06:04,224 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:06:04,225 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:06:04,226 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:06:04,226 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:06:04,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:04" (1/1) ... [2024-11-09 05:06:04,244 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:04" (1/1) ... [2024-11-09 05:06:04,270 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2024-11-09 05:06:04,273 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:06:04,274 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:06:04,274 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:06:04,275 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:06:04,285 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:04" (1/1) ... [2024-11-09 05:06:04,285 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:04" (1/1) ... [2024-11-09 05:06:04,287 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:04" (1/1) ... [2024-11-09 05:06:04,290 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:04" (1/1) ... [2024-11-09 05:06:04,299 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:04" (1/1) ... [2024-11-09 05:06:04,306 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:04" (1/1) ... [2024-11-09 05:06:04,311 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:04" (1/1) ... [2024-11-09 05:06:04,312 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:04" (1/1) ... [2024-11-09 05:06:04,318 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:06:04,319 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:06:04,319 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:06:04,319 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:06:04,320 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:04" (1/1) ... [2024-11-09 05:06:04,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:06:04,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:06:04,355 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:06:04,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:06:04,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:06:04,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:06:04,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:06:04,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:06:04,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:06:04,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:06:04,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:06:04,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:06:04,493 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:06:04,496 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:06:04,682 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-09 05:06:04,682 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:06:04,736 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:06:04,736 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 05:06:04,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:06:04 BoogieIcfgContainer [2024-11-09 05:06:04,737 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:06:04,741 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:06:04,741 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:06:04,745 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:06:04,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:06:03" (1/3) ... [2024-11-09 05:06:04,747 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a2d185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:06:04, skipping insertion in model container [2024-11-09 05:06:04,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:04" (2/3) ... [2024-11-09 05:06:04,748 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a2d185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:06:04, skipping insertion in model container [2024-11-09 05:06:04,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:06:04" (3/3) ... [2024-11-09 05:06:04,750 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-2.i [2024-11-09 05:06:04,772 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:06:04,773 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:06:04,843 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:06:04,850 INFO L333 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, 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;@5fd82c2a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:06:04,851 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:06:04,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:04,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 05:06:04,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:06:04,864 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:06:04,865 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:06:04,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:06:04,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1092053466, now seen corresponding path program 1 times [2024-11-09 05:06:04,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:06:04,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670611834] [2024-11-09 05:06:04,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:04,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:06:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:06:05,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:06:05,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670611834] [2024-11-09 05:06:05,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670611834] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:06:05,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:06:05,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:06:05,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411241125] [2024-11-09 05:06:05,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:06:05,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 05:06:05,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:06:05,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 05:06:05,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 05:06:05,117 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:05,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:06:05,147 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2024-11-09 05:06:05,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 05:06:05,150 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-09 05:06:05,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:06:05,160 INFO L225 Difference]: With dead ends: 23 [2024-11-09 05:06:05,160 INFO L226 Difference]: Without dead ends: 12 [2024-11-09 05:06:05,164 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 05:06:05,168 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:06:05,170 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:06:05,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-09 05:06:05,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-09 05:06:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2024-11-09 05:06:05,208 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2024-11-09 05:06:05,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:06:05,208 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2024-11-09 05:06:05,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:05,210 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2024-11-09 05:06:05,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 05:06:05,211 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:06:05,211 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:06:05,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:06:05,212 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:06:05,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:06:05,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1316538957, now seen corresponding path program 1 times [2024-11-09 05:06:05,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:06:05,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113550378] [2024-11-09 05:06:05,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:05,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:06:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:06:05,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:06:05,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113550378] [2024-11-09 05:06:05,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113550378] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:06:05,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:06:05,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:06:05,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893833791] [2024-11-09 05:06:05,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:06:05,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:06:05,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:06:05,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:06:05,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:06:05,390 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:06:05,418 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2024-11-09 05:06:05,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:06:05,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 05:06:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:06:05,420 INFO L225 Difference]: With dead ends: 23 [2024-11-09 05:06:05,420 INFO L226 Difference]: Without dead ends: 14 [2024-11-09 05:06:05,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:06:05,422 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:06:05,423 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:06:05,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-09 05:06:05,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-09 05:06:05,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:05,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2024-11-09 05:06:05,428 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2024-11-09 05:06:05,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:06:05,428 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2024-11-09 05:06:05,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:05,429 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2024-11-09 05:06:05,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 05:06:05,430 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:06:05,430 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:06:05,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:06:05,431 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:06:05,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:06:05,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1545870894, now seen corresponding path program 1 times [2024-11-09 05:06:05,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:06:05,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31630510] [2024-11-09 05:06:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:05,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:06:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:06:05,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:06:05,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31630510] [2024-11-09 05:06:05,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31630510] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:06:05,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825082263] [2024-11-09 05:06:05,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:05,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:05,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:06:05,642 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:06:05,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:06:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:05,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:06:05,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:06:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:06:05,808 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:06:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:06:05,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825082263] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:06:05,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [125096405] [2024-11-09 05:06:05,874 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:06:05,875 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:06:05,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:06:05,887 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:06:05,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:06:06,518 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:06:06,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [125096405] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:06:06,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:06:06,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 12 [2024-11-09 05:06:06,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863205214] [2024-11-09 05:06:06,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:06:06,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:06:06,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:06:06,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:06:06,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:06:06,759 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:06,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:06:06,840 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2024-11-09 05:06:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:06:06,842 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-09 05:06:06,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:06:06,843 INFO L225 Difference]: With dead ends: 28 [2024-11-09 05:06:06,843 INFO L226 Difference]: Without dead ends: 16 [2024-11-09 05:06:06,845 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:06:06,848 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:06:06,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:06:06,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-09 05:06:06,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2024-11-09 05:06:06,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-11-09 05:06:06,857 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2024-11-09 05:06:06,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:06:06,857 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-11-09 05:06:06,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-11-09 05:06:06,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 05:06:06,858 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:06:06,859 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:06:06,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:06:07,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:07,064 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:06:07,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:06:07,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1324029635, now seen corresponding path program 1 times [2024-11-09 05:06:07,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:06:07,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497631802] [2024-11-09 05:06:07,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:07,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:06:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:06:07,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:06:07,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497631802] [2024-11-09 05:06:07,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497631802] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:06:07,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333584043] [2024-11-09 05:06:07,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:07,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:07,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:06:07,186 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:06:07,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:06:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:07,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:06:07,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:06:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:06:07,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:06:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:06:07,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333584043] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:06:07,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [49425436] [2024-11-09 05:06:07,319 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:06:07,320 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:06:07,320 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:06:07,320 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:06:07,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:06:07,743 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:06:08,141 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '321#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) 0) 0)) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) 0))))' at error location [2024-11-09 05:06:08,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:06:08,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:06:08,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 05:06:08,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268988695] [2024-11-09 05:06:08,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:06:08,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:06:08,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:06:08,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:06:08,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=152, Unknown=1, NotChecked=0, Total=210 [2024-11-09 05:06:08,145 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:08,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:06:08,185 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-11-09 05:06:08,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:06:08,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 05:06:08,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:06:08,186 INFO L225 Difference]: With dead ends: 32 [2024-11-09 05:06:08,186 INFO L226 Difference]: Without dead ends: 21 [2024-11-09 05:06:08,187 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=152, Unknown=1, NotChecked=0, Total=210 [2024-11-09 05:06:08,188 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:06:08,189 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:06:08,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-09 05:06:08,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-09 05:06:08,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-11-09 05:06:08,195 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2024-11-09 05:06:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:06:08,195 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-11-09 05:06:08,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:08,196 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-11-09 05:06:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 05:06:08,197 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:06:08,197 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:06:08,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:06:08,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:08,401 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:06:08,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:06:08,402 INFO L85 PathProgramCache]: Analyzing trace with hash 40048780, now seen corresponding path program 2 times [2024-11-09 05:06:08,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:06:08,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977356299] [2024-11-09 05:06:08,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:08,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:06:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:06:08,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:06:08,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977356299] [2024-11-09 05:06:08,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977356299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:06:08,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137310500] [2024-11-09 05:06:08,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:06:08,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:08,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:06:08,624 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:06:08,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:06:08,700 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:06:08,700 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:06:08,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 05:06:08,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:06:08,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 05:06:08,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2024-11-09 05:06:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:06:09,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:06:09,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:06:09,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2024-11-09 05:06:09,138 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 05:06:09,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2024-11-09 05:06:09,187 INFO L349 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2024-11-09 05:06:09,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 72 [2024-11-09 05:06:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:06:09,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137310500] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:06:09,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2041088093] [2024-11-09 05:06:09,374 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:06:09,376 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:06:09,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:06:09,377 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:06:09,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:06:09,719 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:06:10,107 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '523#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) 0) 0)) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) 0))))' at error location [2024-11-09 05:06:10,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:06:10,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:06:10,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-09 05:06:10,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502835882] [2024-11-09 05:06:10,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:06:10,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 05:06:10,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:06:10,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 05:06:10,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=377, Unknown=1, NotChecked=0, Total=462 [2024-11-09 05:06:10,109 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:10,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:06:10,340 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2024-11-09 05:06:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 05:06:10,341 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-09 05:06:10,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:06:10,341 INFO L225 Difference]: With dead ends: 39 [2024-11-09 05:06:10,342 INFO L226 Difference]: Without dead ends: 28 [2024-11-09 05:06:10,342 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=617, Unknown=1, NotChecked=0, Total=756 [2024-11-09 05:06:10,343 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:06:10,343 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 37 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:06:10,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-09 05:06:10,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2024-11-09 05:06:10,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:10,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2024-11-09 05:06:10,353 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2024-11-09 05:06:10,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:06:10,354 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2024-11-09 05:06:10,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:10,357 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2024-11-09 05:06:10,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 05:06:10,358 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:06:10,358 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:06:10,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:06:10,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:10,559 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:06:10,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:06:10,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1922579907, now seen corresponding path program 1 times [2024-11-09 05:06:10,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:06:10,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640731528] [2024-11-09 05:06:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:10,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:06:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 05:06:10,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:06:10,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640731528] [2024-11-09 05:06:10,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640731528] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:06:10,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672915361] [2024-11-09 05:06:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:10,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:10,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:06:10,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:06:10,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:06:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:10,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:06:10,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:06:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 05:06:10,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:06:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 05:06:10,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672915361] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:06:10,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [846821195] [2024-11-09 05:06:10,965 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:06:10,965 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:06:10,966 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:06:10,966 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:06:10,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:06:11,327 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:06:11,743 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '790#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)))' at error location [2024-11-09 05:06:11,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:06:11,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:06:11,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-09 05:06:11,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339914150] [2024-11-09 05:06:11,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:06:11,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 05:06:11,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:06:11,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 05:06:11,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=372, Unknown=2, NotChecked=0, Total=506 [2024-11-09 05:06:11,748 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:11,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:06:11,808 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2024-11-09 05:06:11,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:06:11,809 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-09 05:06:11,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:06:11,810 INFO L225 Difference]: With dead ends: 54 [2024-11-09 05:06:11,810 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 05:06:11,811 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=372, Unknown=2, NotChecked=0, Total=506 [2024-11-09 05:06:11,811 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:06:11,812 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:06:11,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 05:06:11,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-09 05:06:11,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2024-11-09 05:06:11,819 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 25 [2024-11-09 05:06:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:06:11,820 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2024-11-09 05:06:11,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2024-11-09 05:06:11,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 05:06:11,821 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:06:11,821 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:06:11,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:06:12,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:12,026 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:06:12,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:06:12,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1922521760, now seen corresponding path program 2 times [2024-11-09 05:06:12,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:06:12,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146246040] [2024-11-09 05:06:12,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:12,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:06:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 05:06:12,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:06:12,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146246040] [2024-11-09 05:06:12,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146246040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:06:12,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716648306] [2024-11-09 05:06:12,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:06:12,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:12,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:06:12,375 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:06:12,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:06:12,469 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:06:12,469 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:06:12,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 05:06:12,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:06:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-09 05:06:12,787 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:06:12,971 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 05:06:12,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 18 [2024-11-09 05:06:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-09 05:06:13,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716648306] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:06:13,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1554476793] [2024-11-09 05:06:13,061 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:06:13,061 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:06:13,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:06:13,061 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:06:13,062 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:06:13,411 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:06:13,947 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1186#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)))' at error location [2024-11-09 05:06:13,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:06:13,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:06:13,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 27 [2024-11-09 05:06:13,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663994624] [2024-11-09 05:06:13,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:06:13,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 05:06:13,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:06:13,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 05:06:13,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1079, Unknown=2, NotChecked=0, Total=1260 [2024-11-09 05:06:13,951 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:14,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:06:14,438 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2024-11-09 05:06:14,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 05:06:14,438 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-09 05:06:14,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:06:14,439 INFO L225 Difference]: With dead ends: 73 [2024-11-09 05:06:14,439 INFO L226 Difference]: Without dead ends: 52 [2024-11-09 05:06:14,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=416, Invalid=2132, Unknown=2, NotChecked=0, Total=2550 [2024-11-09 05:06:14,441 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:06:14,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 59 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:06:14,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-09 05:06:14,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2024-11-09 05:06:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:14,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2024-11-09 05:06:14,449 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 39 [2024-11-09 05:06:14,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:06:14,449 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2024-11-09 05:06:14,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:14,450 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2024-11-09 05:06:14,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 05:06:14,451 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:06:14,451 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:06:14,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 05:06:14,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:14,655 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:06:14,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:06:14,656 INFO L85 PathProgramCache]: Analyzing trace with hash -2106800240, now seen corresponding path program 3 times [2024-11-09 05:06:14,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:06:14,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970704484] [2024-11-09 05:06:14,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:14,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:06:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:06:15,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:06:15,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970704484] [2024-11-09 05:06:15,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970704484] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:06:15,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899137234] [2024-11-09 05:06:15,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:06:15,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:15,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:06:15,038 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:06:15,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:06:15,151 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:06:15,151 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:06:15,152 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 05:06:15,154 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:06:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:06:15,213 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:06:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:06:15,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899137234] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:06:15,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1804949273] [2024-11-09 05:06:15,569 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:06:15,569 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:06:15,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:06:15,570 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:06:15,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:06:15,911 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:06:16,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1669#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)))' at error location [2024-11-09 05:06:16,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:06:16,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:06:16,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2024-11-09 05:06:16,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079019780] [2024-11-09 05:06:16,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:06:16,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 05:06:16,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:06:16,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 05:06:16,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=988, Unknown=2, NotChecked=0, Total=1482 [2024-11-09 05:06:16,334 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:16,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:06:16,450 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2024-11-09 05:06:16,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-09 05:06:16,450 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-09 05:06:16,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:06:16,451 INFO L225 Difference]: With dead ends: 90 [2024-11-09 05:06:16,451 INFO L226 Difference]: Without dead ends: 74 [2024-11-09 05:06:16,452 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=492, Invalid=988, Unknown=2, NotChecked=0, Total=1482 [2024-11-09 05:06:16,453 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:06:16,453 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:06:16,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-09 05:06:16,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-09 05:06:16,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:16,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2024-11-09 05:06:16,476 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 43 [2024-11-09 05:06:16,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:06:16,477 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2024-11-09 05:06:16,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:16,477 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2024-11-09 05:06:16,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-09 05:06:16,479 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:06:16,479 INFO L215 NwaCegarLoop]: trace histogram [28, 28, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:06:16,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 05:06:16,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:16,683 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:06:16,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:06:16,684 INFO L85 PathProgramCache]: Analyzing trace with hash 547096155, now seen corresponding path program 4 times [2024-11-09 05:06:16,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:06:16,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468763417] [2024-11-09 05:06:16,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:16,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:06:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:06:17,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:06:17,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468763417] [2024-11-09 05:06:17,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468763417] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:06:17,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446917044] [2024-11-09 05:06:17,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:06:17,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:17,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:06:17,770 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:06:17,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:06:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:17,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 05:06:17,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:06:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:06:18,046 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:06:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:06:19,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446917044] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:06:19,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1146086411] [2024-11-09 05:06:19,256 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:06:19,256 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:06:19,256 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:06:19,256 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:06:19,256 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:06:19,577 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:06:20,077 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2407#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)))' at error location [2024-11-09 05:06:20,077 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:06:20,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:06:20,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2024-11-09 05:06:20,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423233725] [2024-11-09 05:06:20,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:06:20,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-09 05:06:20,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:06:20,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-09 05:06:20,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1857, Invalid=2833, Unknown=2, NotChecked=0, Total=4692 [2024-11-09 05:06:20,082 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:20,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:06:20,350 INFO L93 Difference]: Finished difference Result 150 states and 183 transitions. [2024-11-09 05:06:20,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-09 05:06:20,350 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-11-09 05:06:20,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:06:20,351 INFO L225 Difference]: With dead ends: 150 [2024-11-09 05:06:20,351 INFO L226 Difference]: Without dead ends: 134 [2024-11-09 05:06:20,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1857, Invalid=2833, Unknown=2, NotChecked=0, Total=4692 [2024-11-09 05:06:20,353 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:06:20,353 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:06:20,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-09 05:06:20,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2024-11-09 05:06:20,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2024-11-09 05:06:20,374 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 73 [2024-11-09 05:06:20,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:06:20,374 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2024-11-09 05:06:20,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:20,375 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2024-11-09 05:06:20,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-09 05:06:20,376 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:06:20,377 INFO L215 NwaCegarLoop]: trace histogram [58, 58, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:06:20,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:06:20,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:20,578 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:06:20,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:06:20,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1702237233, now seen corresponding path program 5 times [2024-11-09 05:06:20,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:06:20,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526537609] [2024-11-09 05:06:20,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:20,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:06:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3373 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:06:24,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:06:24,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526537609] [2024-11-09 05:06:24,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526537609] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:06:24,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167390319] [2024-11-09 05:06:24,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:06:24,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:24,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:06:24,205 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:06:24,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:06:24,384 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 05:06:24,384 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:06:24,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 05:06:24,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:06:24,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 05:06:25,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2024-11-09 05:06:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3373 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3364 trivial. 0 not checked. [2024-11-09 05:06:25,428 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:06:25,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 05:06:25,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 88 [2024-11-09 05:06:25,677 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 05:06:25,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 18 [2024-11-09 05:06:25,705 INFO L349 Elim1Store]: treesize reduction 18, result has 41.9 percent of original size [2024-11-09 05:06:25,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 27 [2024-11-09 05:06:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3373 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3364 trivial. 0 not checked. [2024-11-09 05:06:25,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167390319] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:06:25,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1026514807] [2024-11-09 05:06:25,945 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:06:25,945 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:06:25,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:06:25,945 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:06:25,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:06:26,248 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:06:27,028 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3696#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)))' at error location [2024-11-09 05:06:27,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:06:27,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:06:27,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 7, 7] total 71 [2024-11-09 05:06:27,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361072264] [2024-11-09 05:06:27,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:06:27,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-09 05:06:27,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:06:27,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-09 05:06:27,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1894, Invalid=4424, Unknown=2, NotChecked=0, Total=6320 [2024-11-09 05:06:27,032 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 72 states, 72 states have (on average 2.263888888888889) internal successors, (163), 71 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:30,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:06:30,119 INFO L93 Difference]: Finished difference Result 158 states and 163 transitions. [2024-11-09 05:06:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-09 05:06:30,120 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.263888888888889) internal successors, (163), 71 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2024-11-09 05:06:30,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:06:30,121 INFO L225 Difference]: With dead ends: 158 [2024-11-09 05:06:30,121 INFO L226 Difference]: Without dead ends: 142 [2024-11-09 05:06:30,126 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 378 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3389 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5620, Invalid=13838, Unknown=2, NotChecked=0, Total=19460 [2024-11-09 05:06:30,127 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:06:30,127 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 64 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:06:30,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-09 05:06:30,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2024-11-09 05:06:30,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:30,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2024-11-09 05:06:30,148 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 133 [2024-11-09 05:06:30,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:06:30,149 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2024-11-09 05:06:30,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.263888888888889) internal successors, (163), 71 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:30,149 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2024-11-09 05:06:30,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-09 05:06:30,151 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:06:30,152 INFO L215 NwaCegarLoop]: trace histogram [59, 59, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 05:06:30,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 05:06:30,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 05:06:30,352 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:06:30,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:06:30,353 INFO L85 PathProgramCache]: Analyzing trace with hash 2131959842, now seen corresponding path program 6 times [2024-11-09 05:06:30,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:06:30,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953257767] [2024-11-09 05:06:30,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:30,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:06:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3497 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:06:33,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:06:33,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953257767] [2024-11-09 05:06:33,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953257767] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:06:33,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469362189] [2024-11-09 05:06:33,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:06:33,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:33,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:06:33,686 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:06:33,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:06:33,953 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:06:33,954 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:06:33,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-09 05:06:33,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:06:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3497 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:06:34,183 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:06:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3497 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:06:39,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469362189] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:06:39,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1487917250] [2024-11-09 05:06:39,170 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:06:39,170 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:06:39,171 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:06:39,171 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:06:39,171 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:06:39,421 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:06:40,079 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5210#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)))' at error location [2024-11-09 05:06:40,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:06:40,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:06:40,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 122 [2024-11-09 05:06:40,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463248731] [2024-11-09 05:06:40,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:06:40,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2024-11-09 05:06:40,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:06:40,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2024-11-09 05:06:40,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7530, Invalid=9498, Unknown=2, NotChecked=0, Total=17030 [2024-11-09 05:06:40,087 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 123 states, 123 states have (on average 2.0569105691056913) internal successors, (253), 122 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:40,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:06:40,712 INFO L93 Difference]: Finished difference Result 282 states and 346 transitions. [2024-11-09 05:06:40,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2024-11-09 05:06:40,712 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.0569105691056913) internal successors, (253), 122 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2024-11-09 05:06:40,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:06:40,714 INFO L225 Difference]: With dead ends: 282 [2024-11-09 05:06:40,714 INFO L226 Difference]: Without dead ends: 262 [2024-11-09 05:06:40,717 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=7530, Invalid=9498, Unknown=2, NotChecked=0, Total=17030 [2024-11-09 05:06:40,717 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:06:40,718 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 57 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:06:40,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-09 05:06:40,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2024-11-09 05:06:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0114942528735633) internal successors, (264), 261 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:40,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 264 transitions. [2024-11-09 05:06:40,749 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 264 transitions. Word has length 139 [2024-11-09 05:06:40,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:06:40,750 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 264 transitions. [2024-11-09 05:06:40,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.0569105691056913) internal successors, (253), 122 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:40,751 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 264 transitions. [2024-11-09 05:06:40,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2024-11-09 05:06:40,755 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:06:40,755 INFO L215 NwaCegarLoop]: trace histogram [120, 120, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 05:06:40,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 05:06:40,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 05:06:40,956 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:06:40,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:06:40,957 INFO L85 PathProgramCache]: Analyzing trace with hash -86160621, now seen corresponding path program 7 times [2024-11-09 05:06:40,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:06:40,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426826587] [2024-11-09 05:06:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:40,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:06:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14416 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:06:51,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:06:51,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426826587] [2024-11-09 05:06:51,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426826587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:06:51,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484830897] [2024-11-09 05:06:51,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:06:51,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:51,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:06:51,968 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:06:51,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:06:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:52,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 1309 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-09 05:06:52,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:06:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14416 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:06:52,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:07:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 14416 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:07:12,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484830897] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:07:12,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [683029676] [2024-11-09 05:07:12,556 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:07:12,556 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:07:12,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:07:12,557 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:07:12,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:07:12,903 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:07:13,989 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7827#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)))' at error location [2024-11-09 05:07:13,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:07:13,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:07:13,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122, 122] total 244 [2024-11-09 05:07:13,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661593142] [2024-11-09 05:07:13,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:07:13,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 245 states [2024-11-09 05:07:13,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:07:14,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 245 interpolants. [2024-11-09 05:07:14,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29917, Invalid=33837, Unknown=2, NotChecked=0, Total=63756 [2024-11-09 05:07:14,010 INFO L87 Difference]: Start difference. First operand 262 states and 264 transitions. Second operand has 245 states, 245 states have (on average 2.0285714285714285) internal successors, (497), 244 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:07:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:07:16,163 INFO L93 Difference]: Finished difference Result 526 states and 651 transitions. [2024-11-09 05:07:16,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2024-11-09 05:07:16,164 INFO L78 Accepts]: Start accepts. Automaton has has 245 states, 245 states have (on average 2.0285714285714285) internal successors, (497), 244 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 261 [2024-11-09 05:07:16,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:07:16,166 INFO L225 Difference]: With dead ends: 526 [2024-11-09 05:07:16,166 INFO L226 Difference]: Without dead ends: 506 [2024-11-09 05:07:16,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 652 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3396 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=29917, Invalid=33837, Unknown=2, NotChecked=0, Total=63756 [2024-11-09 05:07:16,172 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:07:16,173 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 89 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 05:07:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2024-11-09 05:07:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2024-11-09 05:07:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 1.005940594059406) internal successors, (508), 505 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:07:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 508 transitions. [2024-11-09 05:07:16,237 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 508 transitions. Word has length 261 [2024-11-09 05:07:16,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:07:16,238 INFO L471 AbstractCegarLoop]: Abstraction has 506 states and 508 transitions. [2024-11-09 05:07:16,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 245 states, 245 states have (on average 2.0285714285714285) internal successors, (497), 244 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:07:16,239 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 508 transitions. [2024-11-09 05:07:16,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2024-11-09 05:07:16,251 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:07:16,251 INFO L215 NwaCegarLoop]: trace histogram [242, 242, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 05:07:16,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 05:07:16,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 05:07:16,452 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:07:16,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:07:16,452 INFO L85 PathProgramCache]: Analyzing trace with hash -897262795, now seen corresponding path program 8 times [2024-11-09 05:07:16,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:07:16,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953581072] [2024-11-09 05:07:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:07:16,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:07:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:08:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 58580 backedges. 0 proven. 58564 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:08:06,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:08:06,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953581072] [2024-11-09 05:08:06,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953581072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:08:06,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618148021] [2024-11-09 05:08:06,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:08:06,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:08:06,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:08:06,121 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:08:06,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 05:08:06,637 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 05:08:06,638 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:08:06,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 05:08:06,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:08:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 58580 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 58564 trivial. 0 not checked. [2024-11-09 05:08:09,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:08:10,355 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 05:08:10,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 18 [2024-11-09 05:08:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 58580 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 58564 trivial. 0 not checked. [2024-11-09 05:08:11,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618148021] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:08:11,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1108640845] [2024-11-09 05:08:11,317 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:08:11,317 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:08:11,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:08:11,318 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:08:11,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:08:11,548 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:08:13,995 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12657#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)))' at error location [2024-11-09 05:08:13,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:08:13,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:08:13,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [244, 10, 10] total 261 [2024-11-09 05:08:13,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273963762] [2024-11-09 05:08:13,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:08:13,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 262 states [2024-11-09 05:08:13,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:08:14,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 262 interpolants. [2024-11-09 05:08:14,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29979, Invalid=42649, Unknown=2, NotChecked=0, Total=72630 [2024-11-09 05:08:14,008 INFO L87 Difference]: Start difference. First operand 506 states and 508 transitions. Second operand has 262 states, 262 states have (on average 2.049618320610687) internal successors, (537), 261 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:08:52,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:08:52,306 INFO L93 Difference]: Finished difference Result 549 states and 554 transitions. [2024-11-09 05:08:52,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2024-11-09 05:08:52,307 INFO L78 Accepts]: Start accepts. Automaton has has 262 states, 262 states have (on average 2.049618320610687) internal successors, (537), 261 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 505 [2024-11-09 05:08:52,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:08:52,309 INFO L225 Difference]: With dead ends: 549 [2024-11-09 05:08:52,309 INFO L226 Difference]: Without dead ends: 518 [2024-11-09 05:08:52,323 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2002 GetRequests, 1489 SyntacticMatches, 0 SemanticMatches, 513 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37821 ImplicationChecksByTransitivity, 70.4s TimeCoverageRelationStatistics Valid=90016, Invalid=174692, Unknown=2, NotChecked=0, Total=264710 [2024-11-09 05:08:52,324 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:08:52,324 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 123 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 05:08:52,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2024-11-09 05:08:52,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 510. [2024-11-09 05:08:52,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.005893909626719) internal successors, (512), 509 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:08:52,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 512 transitions. [2024-11-09 05:08:52,379 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 512 transitions. Word has length 505 [2024-11-09 05:08:52,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:08:52,380 INFO L471 AbstractCegarLoop]: Abstraction has 510 states and 512 transitions. [2024-11-09 05:08:52,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 262 states, 262 states have (on average 2.049618320610687) internal successors, (537), 261 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:08:52,381 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 512 transitions. [2024-11-09 05:08:52,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2024-11-09 05:08:52,395 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:08:52,396 INFO L215 NwaCegarLoop]: trace histogram [243, 243, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 05:08:52,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 05:08:52,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 05:08:52,598 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:08:52,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:08:52,601 INFO L85 PathProgramCache]: Analyzing trace with hash 390513957, now seen corresponding path program 9 times [2024-11-09 05:08:52,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:08:52,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782977360] [2024-11-09 05:08:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:08:52,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:08:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:09:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 59071 backedges. 0 proven. 59049 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 05:09:39,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:09:39,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782977360] [2024-11-09 05:09:39,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782977360] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:09:39,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581573981] [2024-11-09 05:09:39,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:09:39,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:09:39,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:09:39,433 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:09:39,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 05:09:40,262 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:09:40,262 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:09:40,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 2548 conjuncts, 245 conjuncts are in the unsatisfiable core [2024-11-09 05:09:40,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:09:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 59071 backedges. 0 proven. 59049 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 05:09:41,019 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:11:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 59071 backedges. 0 proven. 59049 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 05:11:10,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581573981] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:11:10,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [496558413] [2024-11-09 05:11:10,227 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:11:10,228 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:11:10,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:11:10,228 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:11:10,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:11:10,513 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:11:12,520 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18265#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0)))' at error location [2024-11-09 05:11:12,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:11:12,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:11:12,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [245, 245, 245] total 490 [2024-11-09 05:11:12,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738925814] [2024-11-09 05:11:12,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:11:12,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 491 states [2024-11-09 05:11:12,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:11:12,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 491 interpolants. [2024-11-09 05:11:12,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120322, Invalid=128178, Unknown=2, NotChecked=0, Total=248502 [2024-11-09 05:11:12,576 INFO L87 Difference]: Start difference. First operand 510 states and 512 transitions. Second operand has 491 states, 491 states have (on average 2.0142566191446027) internal successors, (989), 490 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:11:21,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:11:21,406 INFO L93 Difference]: Finished difference Result 1022 states and 1270 transitions. [2024-11-09 05:11:21,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 490 states. [2024-11-09 05:11:21,407 INFO L78 Accepts]: Start accepts. Automaton has has 491 states, 491 states have (on average 2.0142566191446027) internal successors, (989), 490 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 509 [2024-11-09 05:11:21,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:11:21,412 INFO L225 Difference]: With dead ends: 1022 [2024-11-09 05:11:21,412 INFO L226 Difference]: Without dead ends: 1000 [2024-11-09 05:11:21,425 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1770 GetRequests, 1273 SyntacticMatches, 0 SemanticMatches, 497 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6840 ImplicationChecksByTransitivity, 117.8s TimeCoverageRelationStatistics Valid=120322, Invalid=128178, Unknown=2, NotChecked=0, Total=248502 [2024-11-09 05:11:21,426 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:11:21,427 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 65 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 05:11:21,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2024-11-09 05:11:21,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 1000. [2024-11-09 05:11:21,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 999 states have (on average 1.003003003003003) internal successors, (1002), 999 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:11:21,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1002 transitions. [2024-11-09 05:11:21,523 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1002 transitions. Word has length 509 [2024-11-09 05:11:21,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:11:21,524 INFO L471 AbstractCegarLoop]: Abstraction has 1000 states and 1002 transitions. [2024-11-09 05:11:21,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 491 states, 491 states have (on average 2.0142566191446027) internal successors, (989), 490 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:11:21,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1002 transitions. [2024-11-09 05:11:21,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1000 [2024-11-09 05:11:21,539 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:11:21,540 INFO L215 NwaCegarLoop]: trace histogram [488, 488, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 05:11:21,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 05:11:21,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:11:21,740 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:11:21,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:11:21,741 INFO L85 PathProgramCache]: Analyzing trace with hash -708263314, now seen corresponding path program 10 times [2024-11-09 05:11:21,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:11:21,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616509927] [2024-11-09 05:11:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:11:21,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:11:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:14:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 238166 backedges. 0 proven. 238144 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 05:14:55,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:14:55,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616509927] [2024-11-09 05:14:55,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616509927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:14:55,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337051105] [2024-11-09 05:14:55,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:14:55,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:14:55,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:14:55,980 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:14:55,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a21c884-3620-4ebf-92ec-e0a93e30a770/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 05:14:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:14:57,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 4998 conjuncts, 490 conjuncts are in the unsatisfiable core [2024-11-09 05:14:57,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:14:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 238166 backedges. 0 proven. 238144 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 05:14:59,224 INFO L311 TraceCheckSpWp]: Computing backward predicates...