./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_doub_access_init_const.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/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_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_doub_access_init_const.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/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_799b7278-6de1-4372-852c-38cff1001b1e/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 db44bcd2632ea44e8f4cb990cbfca281afcea3a1e6019a6e92bc74bb29013bf8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:33:53,641 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:33:53,700 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:33:53,704 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:33:53,705 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:33:53,746 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:33:53,749 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:33:53,750 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:33:53,751 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:33:53,752 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:33:53,754 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:33:53,754 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:33:53,755 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:33:53,755 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:33:53,755 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:33:53,756 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:33:53,756 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:33:53,760 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:33:53,760 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:33:53,761 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:33:53,761 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:33:53,764 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:33:53,764 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:33:53,765 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:33:53,765 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:33:53,778 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:33:53,779 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:33:53,779 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:33:53,779 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:33:53,779 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:33:53,780 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:33:53,780 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:33:53,780 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:33:53,781 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:33:53,781 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:33:53,781 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:33:53,781 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:33:53,782 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:33:53,782 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:33:53,782 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:33:53,783 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:33:53,783 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:33:53,784 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:33:53,784 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:33:53,784 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:33:53,785 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:33:53,785 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:33:53,785 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_799b7278-6de1-4372-852c-38cff1001b1e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db44bcd2632ea44e8f4cb990cbfca281afcea3a1e6019a6e92bc74bb29013bf8 [2024-11-09 05:33:54,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:33:54,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:33:54,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:33:54,066 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:33:54,067 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:33:54,068 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-cav19/array_doub_access_init_const.c Unable to find full path for "g++" [2024-11-09 05:33:56,121 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:33:56,321 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:33:56,322 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/sv-benchmarks/c/array-cav19/array_doub_access_init_const.c [2024-11-09 05:33:56,330 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/data/1dbc34c28/0bedd5f504e84bbfa3f8bee6857fe6b0/FLAG3663392a1 [2024-11-09 05:33:56,357 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/data/1dbc34c28/0bedd5f504e84bbfa3f8bee6857fe6b0 [2024-11-09 05:33:56,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:33:56,363 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:33:56,364 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:33:56,364 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:33:56,372 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:33:56,373 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:33:56" (1/1) ... [2024-11-09 05:33:56,376 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@550485e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:56, skipping insertion in model container [2024-11-09 05:33:56,376 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:33:56" (1/1) ... [2024-11-09 05:33:56,401 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:33:56,632 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_799b7278-6de1-4372-852c-38cff1001b1e/sv-benchmarks/c/array-cav19/array_doub_access_init_const.c[419,432] [2024-11-09 05:33:56,651 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:33:56,663 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:33:56,676 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_799b7278-6de1-4372-852c-38cff1001b1e/sv-benchmarks/c/array-cav19/array_doub_access_init_const.c[419,432] [2024-11-09 05:33:56,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:33:56,704 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:33:56,704 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:56 WrapperNode [2024-11-09 05:33:56,704 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:33:56,706 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:33:56,707 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:33:56,707 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:33:56,715 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:56" (1/1) ... [2024-11-09 05:33:56,721 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:56" (1/1) ... [2024-11-09 05:33:56,739 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2024-11-09 05:33:56,741 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:33:56,741 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:33:56,742 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:33:56,742 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:33:56,751 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:56" (1/1) ... [2024-11-09 05:33:56,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:56" (1/1) ... [2024-11-09 05:33:56,754 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:56" (1/1) ... [2024-11-09 05:33:56,754 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:56" (1/1) ... [2024-11-09 05:33:56,758 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:56" (1/1) ... [2024-11-09 05:33:56,762 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:56" (1/1) ... [2024-11-09 05:33:56,763 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:56" (1/1) ... [2024-11-09 05:33:56,764 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:56" (1/1) ... [2024-11-09 05:33:56,765 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:33:56,766 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:33:56,766 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:33:56,767 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:33:56,768 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:56" (1/1) ... [2024-11-09 05:33:56,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:33:56,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:33:56,802 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:33:56,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:33:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:33:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:33:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:33:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:33:56,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:33:56,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:33:56,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:33:56,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:33:56,896 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:33:56,898 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:33:57,032 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-09 05:33:57,032 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:33:57,062 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:33:57,062 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:33:57,063 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:33:57 BoogieIcfgContainer [2024-11-09 05:33:57,063 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:33:57,067 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:33:57,069 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:33:57,073 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:33:57,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:33:56" (1/3) ... [2024-11-09 05:33:57,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e1b0a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:33:57, skipping insertion in model container [2024-11-09 05:33:57,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:56" (2/3) ... [2024-11-09 05:33:57,075 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e1b0a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:33:57, skipping insertion in model container [2024-11-09 05:33:57,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:33:57" (3/3) ... [2024-11-09 05:33:57,078 INFO L112 eAbstractionObserver]: Analyzing ICFG array_doub_access_init_const.c [2024-11-09 05:33:57,099 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:33:57,100 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:33:57,174 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:33:57,184 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;@38c052d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:33:57,185 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:33:57,190 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 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 05:33:57,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 05:33:57,197 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:57,198 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:33:57,198 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:33:57,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:57,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1637384691, now seen corresponding path program 1 times [2024-11-09 05:33:57,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:57,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409996016] [2024-11-09 05:33:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:57,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:57,533 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 05:33:57,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:57,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409996016] [2024-11-09 05:33:57,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409996016] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:33:57,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:33:57,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:33:57,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338045429] [2024-11-09 05:33:57,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:33:57,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:33:57,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:33:57,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:33:57,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:33:57,577 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 05:33:57,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:33:57,639 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2024-11-09 05:33:57,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:33:57,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2024-11-09 05:33:57,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:33:57,649 INFO L225 Difference]: With dead ends: 23 [2024-11-09 05:33:57,649 INFO L226 Difference]: Without dead ends: 12 [2024-11-09 05:33:57,651 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 05:33:57,655 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:33:57,656 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 14 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:33:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-09 05:33:57,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-09 05:33:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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 05:33:57,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2024-11-09 05:33:57,706 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2024-11-09 05:33:57,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:33:57,707 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2024-11-09 05:33:57,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 05:33:57,707 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2024-11-09 05:33:57,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 05:33:57,708 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:57,708 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:33:57,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:33:57,709 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:33:57,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:57,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1476456328, now seen corresponding path program 1 times [2024-11-09 05:33:57,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:57,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439212917] [2024-11-09 05:33:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:57,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:57,885 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 05:33:57,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:57,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439212917] [2024-11-09 05:33:57,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439212917] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:33:57,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573607992] [2024-11-09 05:33:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:57,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:33:57,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:33:57,894 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:33:57,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:33:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:57,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:33:57,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:33:58,078 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 05:33:58,079 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:33:58,114 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 05:33:58,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573607992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:33:58,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [811196292] [2024-11-09 05:33:58,143 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:33:58,144 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:33:58,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:33:58,153 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:33:58,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:33:58,759 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:33:58,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '118#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 1) 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= 100000 |ULTIMATE.start_main_~N~0#1|))' at error location [2024-11-09 05:33:58,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:33:58,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:33:58,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-09 05:33:58,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319868948] [2024-11-09 05:33:58,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:33:58,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:33:58,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:33:58,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:33:58,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:33:58,922 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 05:33:58,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:33:58,975 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2024-11-09 05:33:58,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:33:58,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 9 [2024-11-09 05:33:58,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:33:58,976 INFO L225 Difference]: With dead ends: 24 [2024-11-09 05:33:58,976 INFO L226 Difference]: Without dead ends: 17 [2024-11-09 05:33:58,977 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:33:58,978 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:33:58,979 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:33:58,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-09 05:33:58,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-09 05:33:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 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 05:33:58,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-11-09 05:33:58,983 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2024-11-09 05:33:58,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:33:58,983 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-11-09 05:33:58,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 05:33:58,984 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-11-09 05:33:58,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 05:33:58,984 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:58,985 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:33:59,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:33:59,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:33:59,186 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:33:59,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:59,188 INFO L85 PathProgramCache]: Analyzing trace with hash -48321401, now seen corresponding path program 2 times [2024-11-09 05:33:59,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:59,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073972502] [2024-11-09 05:33:59,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:59,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:33:59,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:59,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073972502] [2024-11-09 05:33:59,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073972502] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:33:59,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353216566] [2024-11-09 05:33:59,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:33:59,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:33:59,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:33:59,482 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:33:59,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:33:59,570 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 05:33:59,570 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:33:59,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:33:59,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:33:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:33:59,687 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:33:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:33:59,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353216566] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:33:59,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [209214256] [2024-11-09 05:33:59,789 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:33:59,789 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:33:59,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:33:59,790 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:33:59,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:34:00,064 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:34:00,218 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '279#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 1) 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= 100000 |ULTIMATE.start_main_~N~0#1|))' at error location [2024-11-09 05:34:00,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:34:00,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:34:00,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-09 05:34:00,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594973882] [2024-11-09 05:34:00,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:34:00,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 05:34:00,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:34:00,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 05:34:00,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=305, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:34:00,221 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 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 05:34:00,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:34:00,302 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2024-11-09 05:34:00,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 05:34:00,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 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 15 [2024-11-09 05:34:00,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:34:00,304 INFO L225 Difference]: With dead ends: 36 [2024-11-09 05:34:00,305 INFO L226 Difference]: Without dead ends: 29 [2024-11-09 05:34:00,306 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=305, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:34:00,307 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:34:00,308 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:34:00,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-09 05:34:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-09 05:34:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 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 05:34:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2024-11-09 05:34:00,318 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2024-11-09 05:34:00,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:34:00,318 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2024-11-09 05:34:00,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 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 05:34:00,319 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2024-11-09 05:34:00,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 05:34:00,320 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:34:00,320 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:34:00,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:34:00,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:34:00,532 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:34:00,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:34:00,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1797669147, now seen corresponding path program 3 times [2024-11-09 05:34:00,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:34:00,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269920551] [2024-11-09 05:34:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:34:00,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:34:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:34:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:34:00,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:34:00,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269920551] [2024-11-09 05:34:00,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269920551] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:34:00,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568290330] [2024-11-09 05:34:00,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:34:00,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:34:00,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:34:00,858 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:34:00,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:34:01,257 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:34:01,258 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:34:01,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 05:34:01,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:34:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:34:01,527 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:34:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:34:01,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568290330] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:34:01,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [380692509] [2024-11-09 05:34:01,837 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:34:01,837 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:34:01,837 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:34:01,837 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:34:01,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:34:02,071 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:34:02,222 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '566#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 1) 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= 100000 |ULTIMATE.start_main_~N~0#1|))' at error location [2024-11-09 05:34:02,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:34:02,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:34:02,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2024-11-09 05:34:02,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675867852] [2024-11-09 05:34:02,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:34:02,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 05:34:02,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:34:02,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 05:34:02,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=965, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 05:34:02,226 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 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 05:34:02,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:34:02,361 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2024-11-09 05:34:02,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 05:34:02,362 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 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 27 [2024-11-09 05:34:02,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:34:02,363 INFO L225 Difference]: With dead ends: 60 [2024-11-09 05:34:02,365 INFO L226 Difference]: Without dead ends: 53 [2024-11-09 05:34:02,366 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=675, Invalid=965, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 05:34:02,367 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:34:02,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 20 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:34:02,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-09 05:34:02,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-09 05:34:02,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 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 05:34:02,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2024-11-09 05:34:02,377 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2024-11-09 05:34:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:34:02,378 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2024-11-09 05:34:02,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 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 05:34:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2024-11-09 05:34:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 05:34:02,380 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:34:02,380 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:34:02,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 05:34:02,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:34:02,586 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:34:02,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:34:02,587 INFO L85 PathProgramCache]: Analyzing trace with hash -58225503, now seen corresponding path program 4 times [2024-11-09 05:34:02,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:34:02,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14409227] [2024-11-09 05:34:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:34:02,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:34:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:34:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:34:03,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:34:03,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14409227] [2024-11-09 05:34:03,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14409227] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:34:03,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867125465] [2024-11-09 05:34:03,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:34:03,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:34:03,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:34:03,544 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:34:03,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:34:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:34:03,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 05:34:03,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:34:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:34:04,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:34:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:34:05,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867125465] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:34:05,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [912791374] [2024-11-09 05:34:05,322 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:34:05,323 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:34:05,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:34:05,323 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:34:05,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:34:05,498 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:34:05,648 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1105#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 1) 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= 100000 |ULTIMATE.start_main_~N~0#1|))' at error location [2024-11-09 05:34:05,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:34:05,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:34:05,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2024-11-09 05:34:05,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54868090] [2024-11-09 05:34:05,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:34:05,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-09 05:34:05,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:34:05,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-09 05:34:05,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=3365, Unknown=0, NotChecked=0, Total=5852 [2024-11-09 05:34:05,655 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 states have internal predecessors, (143), 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 05:34:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:34:05,926 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2024-11-09 05:34:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-09 05:34:05,928 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 states have internal predecessors, (143), 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 51 [2024-11-09 05:34:05,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:34:05,929 INFO L225 Difference]: With dead ends: 108 [2024-11-09 05:34:05,929 INFO L226 Difference]: Without dead ends: 101 [2024-11-09 05:34:05,932 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2805 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2487, Invalid=3365, Unknown=0, NotChecked=0, Total=5852 [2024-11-09 05:34:05,935 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:34:05,935 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:34:05,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-09 05:34:05,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-11-09 05:34:05,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 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 05:34:05,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2024-11-09 05:34:05,955 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2024-11-09 05:34:05,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:34:05,955 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2024-11-09 05:34:05,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 states have internal predecessors, (143), 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 05:34:05,956 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2024-11-09 05:34:05,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-09 05:34:05,961 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:34:05,961 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:34:05,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:34:06,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:34:06,162 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:34:06,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:34:06,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2124166119, now seen corresponding path program 5 times [2024-11-09 05:34:06,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:34:06,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354965842] [2024-11-09 05:34:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:34:06,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:34:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:34:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:34:08,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:34:08,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354965842] [2024-11-09 05:34:08,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354965842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:34:08,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434667776] [2024-11-09 05:34:08,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:34:08,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:34:08,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:34:08,798 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:34:08,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:48:19,288 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2024-11-09 05:48:19,288 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:48:19,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-09 05:48:19,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:48:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:48:21,545 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:48:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:48:25,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434667776] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:48:25,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [397765009] [2024-11-09 05:48:25,794 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:48:25,794 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:48:25,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:48:25,795 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:48:25,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:48:25,989 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:48:26,230 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2148#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 1) 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= 100000 |ULTIMATE.start_main_~N~0#1|))' at error location [2024-11-09 05:48:26,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:48:26,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:48:26,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 142 [2024-11-09 05:48:26,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804665068] [2024-11-09 05:48:26,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:48:26,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2024-11-09 05:48:26,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:48:26,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2024-11-09 05:48:26,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9567, Invalid=12485, Unknown=0, NotChecked=0, Total=22052 [2024-11-09 05:48:26,247 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 143 states, 143 states have (on average 2.006993006993007) internal successors, (287), 142 states have internal predecessors, (287), 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 05:48:26,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:48:26,867 INFO L93 Difference]: Finished difference Result 204 states and 253 transitions. [2024-11-09 05:48:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-09 05:48:26,868 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.006993006993007) internal successors, (287), 142 states have internal predecessors, (287), 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 99 [2024-11-09 05:48:26,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:48:26,870 INFO L225 Difference]: With dead ends: 204 [2024-11-09 05:48:26,870 INFO L226 Difference]: Without dead ends: 197 [2024-11-09 05:48:26,876 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10245 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=9567, Invalid=12485, Unknown=0, NotChecked=0, Total=22052 [2024-11-09 05:48:26,877 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:48:26,877 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:48:26,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-09 05:48:26,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2024-11-09 05:48:26,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 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 05:48:26,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2024-11-09 05:48:26,900 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 99 [2024-11-09 05:48:26,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:48:26,900 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2024-11-09 05:48:26,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.006993006993007) internal successors, (287), 142 states have internal predecessors, (287), 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 05:48:26,901 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2024-11-09 05:48:26,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-11-09 05:48:26,905 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:48:26,905 INFO L215 NwaCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:48:27,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:48:27,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:48:27,106 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:48:27,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:48:27,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1406215415, now seen corresponding path program 6 times [2024-11-09 05:48:27,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:48:27,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921879558] [2024-11-09 05:48:27,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:48:27,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:48:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:48:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:48:36,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:48:36,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921879558] [2024-11-09 05:48:36,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921879558] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:48:36,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128861844] [2024-11-09 05:48:36,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:48:36,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:48:36,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:48:36,707 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:48:36,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_799b7278-6de1-4372-852c-38cff1001b1e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process