./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/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_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/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_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/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 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:00:25,206 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:00:25,319 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:00:25,325 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:00:25,326 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:00:25,370 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:00:25,372 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:00:25,373 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:00:25,374 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:00:25,377 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:00:25,377 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:00:25,378 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:00:25,378 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:00:25,379 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:00:25,379 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:00:25,379 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:00:25,380 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:00:25,380 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:00:25,381 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:00:25,385 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:00:25,386 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:00:25,390 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:00:25,391 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:00:25,391 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:00:25,392 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:00:25,392 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:00:25,392 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:00:25,393 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:00:25,397 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:00:25,397 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:00:25,398 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:00:25,398 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:00:25,398 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:00:25,399 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:00:25,399 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:00:25,400 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:00:25,400 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:00:25,402 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:00:25,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:00:25,403 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:00:25,403 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:00:25,405 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:00:25,405 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:00:25,405 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:00:25,406 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:00:25,406 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:00:25,407 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:00:25,407 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_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e [2024-11-09 05:00:25,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:00:25,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:00:25,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:00:25,838 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:00:25,838 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:00:25,840 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i Unable to find full path for "g++" [2024-11-09 05:00:28,142 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:00:28,327 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:00:28,328 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2024-11-09 05:00:28,334 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/data/9fb9b13e4/91130abaef3e45699c3a7dc156e9a62f/FLAGeab58e30b [2024-11-09 05:00:28,713 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/data/9fb9b13e4/91130abaef3e45699c3a7dc156e9a62f [2024-11-09 05:00:28,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:00:28,717 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:00:28,719 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:00:28,719 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:00:28,726 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:00:28,727 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:00:28" (1/1) ... [2024-11-09 05:00:28,728 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419de76c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:00:28, skipping insertion in model container [2024-11-09 05:00:28,728 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:00:28" (1/1) ... [2024-11-09 05:00:28,759 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:00:28,950 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_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i[820,833] [2024-11-09 05:00:28,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:00:28,980 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:00:28,995 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_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i[820,833] [2024-11-09 05:00:29,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:00:29,031 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:00:29,032 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:00:29 WrapperNode [2024-11-09 05:00:29,032 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:00:29,033 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:00:29,033 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:00:29,033 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:00:29,039 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:00:29" (1/1) ... [2024-11-09 05:00:29,046 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:00:29" (1/1) ... [2024-11-09 05:00:29,069 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2024-11-09 05:00:29,071 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:00:29,072 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:00:29,072 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:00:29,072 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:00:29,084 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:00:29" (1/1) ... [2024-11-09 05:00:29,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:00:29" (1/1) ... [2024-11-09 05:00:29,087 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:00:29" (1/1) ... [2024-11-09 05:00:29,087 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:00:29" (1/1) ... [2024-11-09 05:00:29,093 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:00:29" (1/1) ... [2024-11-09 05:00:29,102 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:00:29" (1/1) ... [2024-11-09 05:00:29,107 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:00:29" (1/1) ... [2024-11-09 05:00:29,108 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:00:29" (1/1) ... [2024-11-09 05:00:29,114 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:00:29,115 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:00:29,115 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:00:29,115 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:00:29,116 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:00:29" (1/1) ... [2024-11-09 05:00:29,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:00:29,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:00:29,149 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:00:29,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:00:29,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:00:29,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:00:29,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:00:29,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:00:29,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:00:29,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:00:29,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:00:29,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:00:29,257 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:00:29,259 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:00:29,451 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2024-11-09 05:00:29,452 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:00:29,513 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:00:29,513 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:00:29,513 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:00:29 BoogieIcfgContainer [2024-11-09 05:00:29,514 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:00:29,517 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:00:29,517 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:00:29,521 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:00:29,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:00:28" (1/3) ... [2024-11-09 05:00:29,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@455194d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:00:29, skipping insertion in model container [2024-11-09 05:00:29,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:00:29" (2/3) ... [2024-11-09 05:00:29,523 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@455194d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:00:29, skipping insertion in model container [2024-11-09 05:00:29,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:00:29" (3/3) ... [2024-11-09 05:00:29,524 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2024-11-09 05:00:29,546 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:00:29,546 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:00:29,626 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:00:29,639 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;@605f7a3c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:00:29,639 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:00:29,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 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 05:00:29,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 05:00:29,655 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:00:29,655 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:00:29,656 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:00:29,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:00:29,663 INFO L85 PathProgramCache]: Analyzing trace with hash -728879768, now seen corresponding path program 1 times [2024-11-09 05:00:29,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:00:29,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257681012] [2024-11-09 05:00:29,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:00:29,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:00:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:00:29,910 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 05:00:29,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:00:29,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257681012] [2024-11-09 05:00:29,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257681012] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:00:29,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:00:29,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:00:29,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170554591] [2024-11-09 05:00:29,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:00:29,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:00:29,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:00:29,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:00:29,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:00:29,952 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 05:00:30,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:00:30,019 INFO L93 Difference]: Finished difference Result 41 states and 61 transitions. [2024-11-09 05:00:30,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:00:30,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 05:00:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:00:30,036 INFO L225 Difference]: With dead ends: 41 [2024-11-09 05:00:30,036 INFO L226 Difference]: Without dead ends: 21 [2024-11-09 05:00:30,041 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 05:00:30,047 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:00:30,048 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:00:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-09 05:00:30,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-09 05:00:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 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 05:00:30,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2024-11-09 05:00:30,109 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 11 [2024-11-09 05:00:30,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:00:30,109 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2024-11-09 05:00:30,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 05:00:30,110 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2024-11-09 05:00:30,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 05:00:30,110 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:00:30,111 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:00:30,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:00:30,111 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:00:30,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:00:30,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1791163885, now seen corresponding path program 1 times [2024-11-09 05:00:30,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:00:30,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820022065] [2024-11-09 05:00:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:00:30,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:00:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:00:30,290 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 05:00:30,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:00:30,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820022065] [2024-11-09 05:00:30,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820022065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:00:30,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599823831] [2024-11-09 05:00:30,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:00:30,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:00:30,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:00:30,295 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:00:30,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:00:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:00:30,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:00:30,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:00:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:00:30,427 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:00:30,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599823831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:00:30,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:00:30,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-09 05:00:30,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131645411] [2024-11-09 05:00:30,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:00:30,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:00:30,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:00:30,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:00:30,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:00:30,431 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 05:00:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:00:30,475 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2024-11-09 05:00:30,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:00:30,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 05:00:30,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:00:30,478 INFO L225 Difference]: With dead ends: 33 [2024-11-09 05:00:30,478 INFO L226 Difference]: Without dead ends: 23 [2024-11-09 05:00:30,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:00:30,480 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:00:30,482 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 43 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:00:30,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-09 05:00:30,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-09 05:00:30,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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 05:00:30,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2024-11-09 05:00:30,493 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 13 [2024-11-09 05:00:30,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:00:30,493 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2024-11-09 05:00:30,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 05:00:30,495 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2024-11-09 05:00:30,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 05:00:30,496 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:00:30,496 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:00:30,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:00:30,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:00:30,698 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:00:30,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:00:30,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1886798292, now seen corresponding path program 1 times [2024-11-09 05:00:30,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:00:30,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282697152] [2024-11-09 05:00:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:00:30,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:00:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:00:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:00:30,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:00:30,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282697152] [2024-11-09 05:00:30,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282697152] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:00:30,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040627666] [2024-11-09 05:00:30,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:00:30,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:00:30,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:00:30,800 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:00:30,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:00:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:00:30,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:00:30,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:00:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:00:30,907 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:00:30,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040627666] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:00:30,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:00:30,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-09 05:00:30,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141024725] [2024-11-09 05:00:30,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:00:30,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:00:30,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:00:30,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:00:30,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:00:30,912 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 05:00:30,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:00:30,949 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2024-11-09 05:00:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:00:30,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) Word has length 17 [2024-11-09 05:00:30,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:00:30,951 INFO L225 Difference]: With dead ends: 40 [2024-11-09 05:00:30,952 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 05:00:30,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:00:30,954 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:00:30,956 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 44 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:00:30,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 05:00:30,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-09 05:00:30,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 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 05:00:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2024-11-09 05:00:30,965 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 17 [2024-11-09 05:00:30,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:00:30,966 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2024-11-09 05:00:30,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 05:00:30,966 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2024-11-09 05:00:30,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 05:00:30,967 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:00:30,967 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:00:30,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:00:31,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:00:31,172 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:00:31,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:00:31,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1031305387, now seen corresponding path program 1 times [2024-11-09 05:00:31,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:00:31,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534991043] [2024-11-09 05:00:31,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:00:31,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:00:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:00:31,292 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 05:00:31,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:00:31,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534991043] [2024-11-09 05:00:31,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534991043] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:00:31,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471390871] [2024-11-09 05:00:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:00:31,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:00:31,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:00:31,297 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:00:31,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:00:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:00:31,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:00:31,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:00:31,404 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 05:00:31,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:00:31,450 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 05:00:31,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471390871] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:00:31,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1217057794] [2024-11-09 05:00:31,472 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 05:00:31,472 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:00:31,477 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:00:31,483 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:00:31,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:00:32,340 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:00:32,547 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '473#(and (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:00:32,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:00:32,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:00:32,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 05:00:32,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970502387] [2024-11-09 05:00:32,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:00:32,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:00:32,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:00:32,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:00:32,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-09 05:00:32,554 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 05:00:32,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:00:32,648 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2024-11-09 05:00:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:00:32,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 05:00:32,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:00:32,650 INFO L225 Difference]: With dead ends: 50 [2024-11-09 05:00:32,651 INFO L226 Difference]: Without dead ends: 30 [2024-11-09 05:00:32,651 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-09 05:00:32,653 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:00:32,653 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:00:32,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-09 05:00:32,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-09 05:00:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 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 05:00:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-11-09 05:00:32,674 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2024-11-09 05:00:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:00:32,675 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-11-09 05:00:32,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 05:00:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-11-09 05:00:32,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 05:00:32,676 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:00:32,676 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:00:32,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 05:00:32,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:00:32,877 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:00:32,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:00:32,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1598743076, now seen corresponding path program 2 times [2024-11-09 05:00:32,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:00:32,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206945595] [2024-11-09 05:00:32,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:00:32,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:00:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:00:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:00:32,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:00:32,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206945595] [2024-11-09 05:00:32,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206945595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:00:32,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144811988] [2024-11-09 05:00:32,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:00:32,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:00:32,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:00:32,993 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:00:32,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:00:33,067 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 05:00:33,068 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:00:33,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:00:33,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:00:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:00:33,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:00:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:00:33,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144811988] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:00:33,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1545280987] [2024-11-09 05:00:33,112 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 05:00:33,112 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:00:33,112 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:00:33,113 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:00:33,113 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:00:33,602 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:00:33,741 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '741#(and (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:00:33,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:00:33,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:00:33,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-09 05:00:33,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019702792] [2024-11-09 05:00:33,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:00:33,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:00:33,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:00:33,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:00:33,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:00:33,743 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 05:00:33,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:00:33,781 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2024-11-09 05:00:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:00:33,782 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 05:00:33,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:00:33,782 INFO L225 Difference]: With dead ends: 52 [2024-11-09 05:00:33,782 INFO L226 Difference]: Without dead ends: 35 [2024-11-09 05:00:33,783 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:00:33,784 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:00:33,784 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 60 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:00:33,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-09 05:00:33,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-09 05:00:33,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 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 05:00:33,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-11-09 05:00:33,789 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 25 [2024-11-09 05:00:33,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:00:33,789 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-11-09 05:00:33,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 05:00:33,789 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-11-09 05:00:33,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-09 05:00:33,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:00:33,790 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:00:33,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:00:33,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:00:33,994 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:00:33,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:00:33,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1999450599, now seen corresponding path program 3 times [2024-11-09 05:00:33,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:00:33,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711948909] [2024-11-09 05:00:33,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:00:33,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:00:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:00:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 05:00:34,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:00:34,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711948909] [2024-11-09 05:00:34,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711948909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:00:34,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747967927] [2024-11-09 05:00:34,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:00:34,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:00:34,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:00:34,162 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:00:34,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:00:34,251 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:00:34,251 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:00:34,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:00:34,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:00:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 05:00:34,289 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:00:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 05:00:34,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747967927] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:00:34,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [145014975] [2024-11-09 05:00:34,374 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 05:00:34,376 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:00:34,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:00:34,377 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:00:34,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:00:34,737 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:00:35,066 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1062#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:00:35,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:00:35,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:00:35,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-09 05:00:35,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702582722] [2024-11-09 05:00:35,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:00:35,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:00:35,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:00:35,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:00:35,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2024-11-09 05:00:35,068 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 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 05:00:35,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:00:35,143 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2024-11-09 05:00:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 05:00:35,145 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 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 31 [2024-11-09 05:00:35,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:00:35,146 INFO L225 Difference]: With dead ends: 72 [2024-11-09 05:00:35,146 INFO L226 Difference]: Without dead ends: 47 [2024-11-09 05:00:35,147 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2024-11-09 05:00:35,147 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:00:35,148 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 97 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:00:35,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-09 05:00:35,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-09 05:00:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 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 05:00:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2024-11-09 05:00:35,158 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 31 [2024-11-09 05:00:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:00:35,158 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2024-11-09 05:00:35,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 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 05:00:35,159 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2024-11-09 05:00:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 05:00:35,160 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:00:35,160 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:00:35,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 05:00:35,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:00:35,361 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:00:35,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:00:35,361 INFO L85 PathProgramCache]: Analyzing trace with hash 953267013, now seen corresponding path program 4 times [2024-11-09 05:00:35,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:00:35,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332372643] [2024-11-09 05:00:35,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:00:35,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:00:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:00:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 05:00:35,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:00:35,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332372643] [2024-11-09 05:00:35,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332372643] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:00:35,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069093249] [2024-11-09 05:00:35,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:00:35,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:00:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:00:35,701 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:00:35,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:00:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:00:35,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:00:35,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:00:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 05:00:35,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:00:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 05:00:36,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069093249] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:00:36,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [721282030] [2024-11-09 05:00:36,146 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 05:00:36,146 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:00:36,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:00:36,147 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:00:36,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:00:36,422 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:00:36,763 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1518#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:00:36,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:00:36,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:00:36,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-09 05:00:36,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196401281] [2024-11-09 05:00:36,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:00:36,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 05:00:36,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:00:36,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 05:00:36,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=917, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 05:00:36,765 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 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 05:00:36,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:00:36,864 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2024-11-09 05:00:36,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 05:00:36,865 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 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 05:00:36,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:00:36,866 INFO L225 Difference]: With dead ends: 96 [2024-11-09 05:00:36,866 INFO L226 Difference]: Without dead ends: 71 [2024-11-09 05:00:36,867 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=917, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 05:00:36,867 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:00:36,868 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 78 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:00:36,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-09 05:00:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-11-09 05:00:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1) internal successors, (77), 70 states have internal predecessors, (77), 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 05:00:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2024-11-09 05:00:36,874 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 43 [2024-11-09 05:00:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:00:36,874 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2024-11-09 05:00:36,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 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 05:00:36,875 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2024-11-09 05:00:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-09 05:00:36,876 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:00:36,876 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:00:36,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 05:00:37,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:00:37,077 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:00:37,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:00:37,077 INFO L85 PathProgramCache]: Analyzing trace with hash 889642753, now seen corresponding path program 5 times [2024-11-09 05:00:37,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:00:37,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215435389] [2024-11-09 05:00:37,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:00:37,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:00:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:00:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 05:00:37,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:00:37,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215435389] [2024-11-09 05:00:37,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215435389] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:00:37,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8876959] [2024-11-09 05:00:37,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:00:37,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:00:37,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:00:37,932 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:00:37,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:00:38,089 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 05:00:38,089 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:00:38,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:00:38,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:00:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-09 05:00:38,203 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:00:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-09 05:00:38,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8876959] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:00:38,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1989375866] [2024-11-09 05:00:38,353 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 05:00:38,353 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:00:38,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:00:38,354 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:00:38,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:00:38,625 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:00:39,183 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2200#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:00:39,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:00:39,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:00:39,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2024-11-09 05:00:39,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050641046] [2024-11-09 05:00:39,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:00:39,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 05:00:39,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:00:39,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 05:00:39,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1662, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 05:00:39,188 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 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 05:00:39,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:00:39,383 INFO L93 Difference]: Finished difference Result 111 states and 129 transitions. [2024-11-09 05:00:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 05:00:39,383 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 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 67 [2024-11-09 05:00:39,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:00:39,385 INFO L225 Difference]: With dead ends: 111 [2024-11-09 05:00:39,385 INFO L226 Difference]: Without dead ends: 86 [2024-11-09 05:00:39,386 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=408, Invalid=1662, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 05:00:39,387 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:00:39,388 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:00:39,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-09 05:00:39,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2024-11-09 05:00:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 84 states have internal predecessors, (91), 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 05:00:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2024-11-09 05:00:39,398 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 67 [2024-11-09 05:00:39,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:00:39,398 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2024-11-09 05:00:39,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 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 05:00:39,399 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2024-11-09 05:00:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 05:00:39,401 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:00:39,401 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:00:39,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:00:39,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 05:00:39,602 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:00:39,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:00:39,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1277319884, now seen corresponding path program 6 times [2024-11-09 05:00:39,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:00:39,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27185129] [2024-11-09 05:00:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:00:39,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:00:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:00:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 05:00:40,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:00:40,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27185129] [2024-11-09 05:00:40,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27185129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:00:40,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122151870] [2024-11-09 05:00:40,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:00:40,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:00:40,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:00:40,785 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:00:40,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:00:40,978 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:00:40,978 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:00:40,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 05:00:40,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:00:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 05:00:41,102 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:00:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 05:00:42,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122151870] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:00:42,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1328986785] [2024-11-09 05:00:42,227 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 05:00:42,227 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:00:42,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:00:42,228 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:00:42,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:00:42,525 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:00:43,028 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3025#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:00:43,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:00:43,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:00:43,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2024-11-09 05:00:43,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142704354] [2024-11-09 05:00:43,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:00:43,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-09 05:00:43,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:00:43,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-09 05:00:43,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1318, Invalid=2464, Unknown=0, NotChecked=0, Total=3782 [2024-11-09 05:00:43,034 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 50 states have internal predecessors, (114), 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 05:00:43,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:00:43,312 INFO L93 Difference]: Finished difference Result 172 states and 208 transitions. [2024-11-09 05:00:43,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-09 05:00:43,313 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 50 states have internal predecessors, (114), 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 81 [2024-11-09 05:00:43,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:00:43,317 INFO L225 Difference]: With dead ends: 172 [2024-11-09 05:00:43,317 INFO L226 Difference]: Without dead ends: 135 [2024-11-09 05:00:43,318 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1318, Invalid=2464, Unknown=0, NotChecked=0, Total=3782 [2024-11-09 05:00:43,323 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:00:43,324 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 78 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:00:43,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-09 05:00:43,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2024-11-09 05:00:43,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0522388059701493) internal successors, (141), 134 states have internal predecessors, (141), 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 05:00:43,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 141 transitions. [2024-11-09 05:00:43,347 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 141 transitions. Word has length 81 [2024-11-09 05:00:43,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:00:43,350 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 141 transitions. [2024-11-09 05:00:43,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 50 states have internal predecessors, (114), 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 05:00:43,351 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 141 transitions. [2024-11-09 05:00:43,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-09 05:00:43,353 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:00:43,353 INFO L215 NwaCegarLoop]: trace histogram [48, 48, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:00:43,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 05:00:43,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:00:43,554 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:00:43,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:00:43,555 INFO L85 PathProgramCache]: Analyzing trace with hash 2025215753, now seen corresponding path program 7 times [2024-11-09 05:00:43,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:00:43,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232332405] [2024-11-09 05:00:43,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:00:43,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:00:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:00:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 05:00:47,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:00:47,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232332405] [2024-11-09 05:00:47,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232332405] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:00:47,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316094002] [2024-11-09 05:00:47,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:00:47,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:00:47,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:00:47,031 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:00:47,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:00:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:00:47,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 05:00:47,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:00:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 05:00:47,557 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:00:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 05:00:51,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316094002] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:00:51,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [969268451] [2024-11-09 05:00:51,595 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 05:00:51,595 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:00:51,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:00:51,595 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:00:51,596 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:00:51,868 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:00:52,632 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4367#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:00:52,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:00:52,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:00:52,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2024-11-09 05:00:52,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812125175] [2024-11-09 05:00:52,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:00:52,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-09 05:00:52,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:00:52,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-09 05:00:52,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5093, Invalid=7339, Unknown=0, NotChecked=0, Total=12432 [2024-11-09 05:00:52,639 INFO L87 Difference]: Start difference. First operand 135 states and 141 transitions. Second operand has 101 states, 101 states have (on average 2.118811881188119) internal successors, (214), 100 states have internal predecessors, (214), 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 05:00:53,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:00:53,207 INFO L93 Difference]: Finished difference Result 272 states and 333 transitions. [2024-11-09 05:00:53,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-11-09 05:00:53,208 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.118811881188119) internal successors, (214), 100 states have internal predecessors, (214), 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 131 [2024-11-09 05:00:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:00:53,210 INFO L225 Difference]: With dead ends: 272 [2024-11-09 05:00:53,211 INFO L226 Difference]: Without dead ends: 235 [2024-11-09 05:00:53,214 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 330 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=5093, Invalid=7339, Unknown=0, NotChecked=0, Total=12432 [2024-11-09 05:00:53,215 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:00:53,216 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 154 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:00:53,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-11-09 05:00:53,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2024-11-09 05:00:53,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.0299145299145298) internal successors, (241), 234 states have internal predecessors, (241), 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 05:00:53,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 241 transitions. [2024-11-09 05:00:53,235 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 241 transitions. Word has length 131 [2024-11-09 05:00:53,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:00:53,235 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 241 transitions. [2024-11-09 05:00:53,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.118811881188119) internal successors, (214), 100 states have internal predecessors, (214), 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 05:00:53,236 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 241 transitions. [2024-11-09 05:00:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2024-11-09 05:00:53,241 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:00:53,241 INFO L215 NwaCegarLoop]: trace histogram [98, 98, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:00:53,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 05:00:53,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 05:00:53,442 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:00:53,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:00:53,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1592761405, now seen corresponding path program 8 times [2024-11-09 05:00:53,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:00:53,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82858591] [2024-11-09 05:00:53,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:00:53,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:00:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:01:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9705 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 05:01:02,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:01:02,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82858591] [2024-11-09 05:01:02,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82858591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:01:02,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865144813] [2024-11-09 05:01:02,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:01:02,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:01:02,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:01:02,587 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:01:02,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:01:04,505 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-09 05:01:04,505 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:01:04,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 05:01:04,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:01:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9705 backedges. 99 proven. 100 refuted. 0 times theorem prover too weak. 9506 trivial. 0 not checked. [2024-11-09 05:01:05,400 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:01:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9705 backedges. 1 proven. 100 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2024-11-09 05:01:06,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865144813] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:01:06,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1433581591] [2024-11-09 05:01:06,138 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 05:01:06,138 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:01:06,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:01:06,139 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:01:06,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:01:06,388 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:01:07,569 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6632#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:01:07,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:01:07,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:01:07,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 14, 13] total 124 [2024-11-09 05:01:07,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039152812] [2024-11-09 05:01:07,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:01:07,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2024-11-09 05:01:07,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:01:07,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2024-11-09 05:01:07,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5470, Invalid=12620, Unknown=0, NotChecked=0, Total=18090 [2024-11-09 05:01:07,580 INFO L87 Difference]: Start difference. First operand 235 states and 241 transitions. Second operand has 124 states, 124 states have (on average 2.1370967741935485) internal successors, (265), 124 states have internal predecessors, (265), 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 05:01:08,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:01:08,215 INFO L93 Difference]: Finished difference Result 299 states and 323 transitions. [2024-11-09 05:01:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2024-11-09 05:01:08,216 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.1370967741935485) internal successors, (265), 124 states have internal predecessors, (265), 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 231 [2024-11-09 05:01:08,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:01:08,218 INFO L225 Difference]: With dead ends: 299 [2024-11-09 05:01:08,218 INFO L226 Difference]: Without dead ends: 262 [2024-11-09 05:01:08,222 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 657 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3770 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5470, Invalid=12620, Unknown=0, NotChecked=0, Total=18090 [2024-11-09 05:01:08,223 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:01:08,224 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 173 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:01:08,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-09 05:01:08,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2024-11-09 05:01:08,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0269230769230768) internal successors, (267), 260 states have internal predecessors, (267), 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 05:01:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 267 transitions. [2024-11-09 05:01:08,244 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 267 transitions. Word has length 231 [2024-11-09 05:01:08,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:01:08,245 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 267 transitions. [2024-11-09 05:01:08,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.1370967741935485) internal successors, (265), 124 states have internal predecessors, (265), 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 05:01:08,246 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 267 transitions. [2024-11-09 05:01:08,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2024-11-09 05:01:08,250 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:01:08,250 INFO L215 NwaCegarLoop]: trace histogram [99, 99, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:01:08,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 05:01:08,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 05:01:08,451 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:01:08,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:01:08,451 INFO L85 PathProgramCache]: Analyzing trace with hash 603164756, now seen corresponding path program 9 times [2024-11-09 05:01:08,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:01:08,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133696760] [2024-11-09 05:01:08,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:01:08,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:01:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:01:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10286 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2024-11-09 05:01:17,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:01:17,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133696760] [2024-11-09 05:01:17,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133696760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:01:17,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241645516] [2024-11-09 05:01:17,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:01:17,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:01:17,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:01:17,364 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:01:17,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 05:01:17,878 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:01:17,878 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:01:17,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-09 05:01:17,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:01:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10286 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2024-11-09 05:01:18,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:01:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10286 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2024-11-09 05:01:32,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241645516] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:01:32,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [513059456] [2024-11-09 05:01:32,354 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 05:01:32,354 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:01:32,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:01:32,354 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:01:32,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:01:32,589 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:01:33,473 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9211#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:01:33,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:01:33,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:01:33,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2024-11-09 05:01:33,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605975207] [2024-11-09 05:01:33,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:01:33,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2024-11-09 05:01:33,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:01:33,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2024-11-09 05:01:33,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20539, Invalid=24617, Unknown=0, NotChecked=0, Total=45156 [2024-11-09 05:01:33,491 INFO L87 Difference]: Start difference. First operand 261 states and 267 transitions. Second operand has 203 states, 203 states have (on average 2.0591133004926108) internal successors, (418), 202 states have internal predecessors, (418), 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 05:01:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:01:35,068 INFO L93 Difference]: Finished difference Result 524 states and 636 transitions. [2024-11-09 05:01:35,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2024-11-09 05:01:35,069 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.0591133004926108) internal successors, (418), 202 states have internal predecessors, (418), 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 257 [2024-11-09 05:01:35,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:01:35,072 INFO L225 Difference]: With dead ends: 524 [2024-11-09 05:01:35,072 INFO L226 Difference]: Without dead ends: 463 [2024-11-09 05:01:35,076 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 658 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3719 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=20539, Invalid=24617, Unknown=0, NotChecked=0, Total=45156 [2024-11-09 05:01:35,077 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:01:35,078 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 192 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:01:35,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2024-11-09 05:01:35,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 463. [2024-11-09 05:01:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 1.0151515151515151) internal successors, (469), 462 states have internal predecessors, (469), 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 05:01:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 469 transitions. [2024-11-09 05:01:35,106 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 469 transitions. Word has length 257 [2024-11-09 05:01:35,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:01:35,107 INFO L471 AbstractCegarLoop]: Abstraction has 463 states and 469 transitions. [2024-11-09 05:01:35,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.0591133004926108) internal successors, (418), 202 states have internal predecessors, (418), 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 05:01:35,108 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 469 transitions. [2024-11-09 05:01:35,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2024-11-09 05:01:35,120 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:01:35,120 INFO L215 NwaCegarLoop]: trace histogram [200, 200, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:01:35,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 05:01:35,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 05:01:35,321 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:01:35,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:01:35,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1967810445, now seen corresponding path program 10 times [2024-11-09 05:01:35,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:01:35,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904411687] [2024-11-09 05:01:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:01:35,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:01:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 40485 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2024-11-09 05:02:08,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:08,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904411687] [2024-11-09 05:02:08,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904411687] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:02:08,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709705787] [2024-11-09 05:02:08,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:02:08,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:02:08,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:02:08,931 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:02:08,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 05:02:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:09,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 2283 conjuncts, 202 conjuncts are in the unsatisfiable core [2024-11-09 05:02:09,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:02:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 40485 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2024-11-09 05:02:10,264 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:03:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 40485 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2024-11-09 05:03:08,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709705787] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:03:08,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1570669596] [2024-11-09 05:03:08,762 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 05:03:08,763 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:03:08,763 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:03:08,764 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:03:08,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:03:09,032 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:03:11,286 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13844#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:03:11,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:03:11,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:03:11,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2024-11-09 05:03:11,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443947105] [2024-11-09 05:03:11,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:03:11,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2024-11-09 05:03:11,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:11,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2024-11-09 05:03:11,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81853, Invalid=90787, Unknown=0, NotChecked=0, Total=172640 [2024-11-09 05:03:11,314 INFO L87 Difference]: Start difference. First operand 463 states and 469 transitions. Second operand has 405 states, 405 states have (on average 2.0296296296296297) internal successors, (822), 404 states have internal predecessors, (822), 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 05:03:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:18,966 INFO L93 Difference]: Finished difference Result 928 states and 1141 transitions. [2024-11-09 05:03:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2024-11-09 05:03:18,968 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 2.0296296296296297) internal successors, (822), 404 states have internal predecessors, (822), 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 459 [2024-11-09 05:03:18,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:18,974 INFO L225 Difference]: With dead ends: 928 [2024-11-09 05:03:18,974 INFO L226 Difference]: Without dead ends: 867 [2024-11-09 05:03:18,987 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1577 GetRequests, 1162 SyntacticMatches, 1 SemanticMatches, 414 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8067 ImplicationChecksByTransitivity, 79.3s TimeCoverageRelationStatistics Valid=81853, Invalid=90787, Unknown=0, NotChecked=0, Total=172640 [2024-11-09 05:03:18,988 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:18,989 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 05:03:18,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2024-11-09 05:03:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 867. [2024-11-09 05:03:19,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 1.008083140877598) internal successors, (873), 866 states have internal predecessors, (873), 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 05:03:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 873 transitions. [2024-11-09 05:03:19,035 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 873 transitions. Word has length 459 [2024-11-09 05:03:19,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:19,037 INFO L471 AbstractCegarLoop]: Abstraction has 867 states and 873 transitions. [2024-11-09 05:03:19,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 2.0296296296296297) internal successors, (822), 404 states have internal predecessors, (822), 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 05:03:19,039 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 873 transitions. [2024-11-09 05:03:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 864 [2024-11-09 05:03:19,077 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:19,077 INFO L215 NwaCegarLoop]: trace histogram [402, 402, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:19,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 05:03:19,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 05:03:19,278 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:03:19,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:19,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1822571457, now seen corresponding path program 11 times [2024-11-09 05:03:19,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:19,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885006087] [2024-11-09 05:03:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:19,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 162089 backedges. 0 proven. 161604 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2024-11-09 05:06:12,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:06:12,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885006087] [2024-11-09 05:06:12,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885006087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:06:12,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410534405] [2024-11-09 05:06:12,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:06:12,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:12,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:06:12,586 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:06:12,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 05:08:30,533 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-11-09 05:08:30,534 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:08:30,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 05:08:30,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:08:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 162089 backedges. 403 proven. 484 refuted. 0 times theorem prover too weak. 161202 trivial. 0 not checked. [2024-11-09 05:08:35,151 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:08:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 162089 backedges. 1 proven. 484 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2024-11-09 05:08:39,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410534405] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:08:39,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1316879102] [2024-11-09 05:08:39,834 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 05:08:39,834 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:08:39,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:08:39,835 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:08:39,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:08:40,035 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:08:43,368 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22161#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:08:43,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:08:43,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:08:43,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 26, 25] total 452 [2024-11-09 05:08:43,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486418332] [2024-11-09 05:08:43,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:08:43,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 452 states [2024-11-09 05:08:43,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:08:43,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 452 interpolants. [2024-11-09 05:08:43,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83386, Invalid=130520, Unknown=0, NotChecked=0, Total=213906 [2024-11-09 05:08:43,392 INFO L87 Difference]: Start difference. First operand 867 states and 873 transitions. Second operand has 452 states, 452 states have (on average 2.0376106194690267) internal successors, (921), 452 states have internal predecessors, (921), 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 05:08:49,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:08:49,564 INFO L93 Difference]: Finished difference Result 979 states and 1015 transitions. [2024-11-09 05:08:49,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 452 states. [2024-11-09 05:08:49,566 INFO L78 Accepts]: Start accepts. Automaton has has 452 states, 452 states have (on average 2.0376106194690267) internal successors, (921), 452 states have internal predecessors, (921), 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 863 [2024-11-09 05:08:49,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:08:49,570 INFO L225 Difference]: With dead ends: 979 [2024-11-09 05:08:49,570 INFO L226 Difference]: Without dead ends: 918 [2024-11-09 05:08:49,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2991 GetRequests, 2529 SyntacticMatches, 1 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24210 ImplicationChecksByTransitivity, 93.0s TimeCoverageRelationStatistics Valid=83386, Invalid=130520, Unknown=0, NotChecked=0, Total=213906 [2024-11-09 05:08:49,581 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:08:49,581 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 231 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 05:08:49,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2024-11-09 05:08:49,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 917. [2024-11-09 05:08:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 1.00764192139738) internal successors, (923), 916 states have internal predecessors, (923), 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 05:08:49,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 923 transitions. [2024-11-09 05:08:49,617 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 923 transitions. Word has length 863 [2024-11-09 05:08:49,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:08:49,619 INFO L471 AbstractCegarLoop]: Abstraction has 917 states and 923 transitions. [2024-11-09 05:08:49,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 452 states, 452 states have (on average 2.0376106194690267) internal successors, (921), 452 states have internal predecessors, (921), 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 05:08:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 923 transitions. [2024-11-09 05:08:49,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 914 [2024-11-09 05:08:49,626 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:08:49,626 INFO L215 NwaCegarLoop]: trace histogram [403, 403, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:08:49,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 05:08:49,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 05:08:49,827 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:08:49,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:08:49,827 INFO L85 PathProgramCache]: Analyzing trace with hash 305432412, now seen corresponding path program 12 times [2024-11-09 05:08:49,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:08:49,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57734660] [2024-11-09 05:08:49,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:08:49,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:08:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:11:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 164526 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 2117 trivial. 0 not checked. [2024-11-09 05:11:01,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:11:01,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57734660] [2024-11-09 05:11:01,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57734660] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:11:01,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763994113] [2024-11-09 05:11:01,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:11:01,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:11:01,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:11:01,595 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:11:01,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc93fd1a-d07e-45e7-89bd-ef0a76cdfcae/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 05:11:03,065 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:11:03,065 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:11:03,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 4553 conjuncts, 405 conjuncts are in the unsatisfiable core [2024-11-09 05:11:03,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:11:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 164526 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 2117 trivial. 0 not checked. [2024-11-09 05:11:04,238 INFO L311 TraceCheckSpWp]: Computing backward predicates...