./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init2_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_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/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_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init2_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/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_fe950519-852b-4c12-a763-e4742ddd46ee/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 cf1af1de3644d7f65779e1f0fa1695f30c94933219211c16e44b2dad6d7664ff --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:26:47,125 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:26:47,238 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 01:26:47,247 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 01:26:47,248 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 01:26:47,290 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:26:47,291 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 01:26:47,291 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 01:26:47,292 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:26:47,294 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 01:26:47,295 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 01:26:47,295 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 01:26:47,296 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 01:26:47,296 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 01:26:47,296 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 01:26:47,299 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 01:26:47,299 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 01:26:47,300 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 01:26:47,300 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 01:26:47,300 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 01:26:47,301 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 01:26:47,302 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 01:26:47,306 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:26:47,307 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 01:26:47,307 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 01:26:47,307 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 01:26:47,308 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 01:26:47,308 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:26:47,308 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 01:26:47,308 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:26:47,309 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 01:26:47,309 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:26:47,310 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 01:26:47,310 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 01:26:47,310 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:26:47,311 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:26:47,311 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 01:26:47,312 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 01:26:47,312 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:26:47,312 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:26:47,313 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:26:47,313 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 01:26:47,313 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 01:26:47,314 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 01:26:47,314 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 01:26:47,314 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 01:26:47,314 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 01:26:47,314 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_fe950519-852b-4c12-a763-e4742ddd46ee/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf1af1de3644d7f65779e1f0fa1695f30c94933219211c16e44b2dad6d7664ff [2024-11-09 01:26:47,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:26:47,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:26:47,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:26:47,654 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:26:47,655 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:26:47,657 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-examples/standard_init2_ground-1.i Unable to find full path for "g++" [2024-11-09 01:26:49,982 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:26:50,295 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:26:50,296 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/sv-benchmarks/c/array-examples/standard_init2_ground-1.i [2024-11-09 01:26:50,307 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/data/cf18bab28/f348a3cf03eb4019a5c6d3bfe9242b9c/FLAGac6fcf3b3 [2024-11-09 01:26:50,335 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/data/cf18bab28/f348a3cf03eb4019a5c6d3bfe9242b9c [2024-11-09 01:26:50,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:26:50,343 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:26:50,345 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:26:50,346 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:26:50,354 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:26:50,355 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:26:50" (1/1) ... [2024-11-09 01:26:50,356 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cd3eee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:26:50, skipping insertion in model container [2024-11-09 01:26:50,357 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:26:50" (1/1) ... [2024-11-09 01:26:50,386 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:26:50,599 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_fe950519-852b-4c12-a763-e4742ddd46ee/sv-benchmarks/c/array-examples/standard_init2_ground-1.i[816,829] [2024-11-09 01:26:50,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:26:50,648 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:26:50,668 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_fe950519-852b-4c12-a763-e4742ddd46ee/sv-benchmarks/c/array-examples/standard_init2_ground-1.i[816,829] [2024-11-09 01:26:50,679 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:26:50,705 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:26:50,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:26:50 WrapperNode [2024-11-09 01:26:50,705 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:26:50,707 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:26:50,707 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:26:50,707 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:26:50,717 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:26:50" (1/1) ... [2024-11-09 01:26:50,728 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:26:50" (1/1) ... [2024-11-09 01:26:50,751 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2024-11-09 01:26:50,752 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:26:50,753 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:26:50,753 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:26:50,753 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:26:50,764 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:26:50" (1/1) ... [2024-11-09 01:26:50,765 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:26:50" (1/1) ... [2024-11-09 01:26:50,766 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:26:50" (1/1) ... [2024-11-09 01:26:50,766 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:26:50" (1/1) ... [2024-11-09 01:26:50,775 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:26:50" (1/1) ... [2024-11-09 01:26:50,783 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:26:50" (1/1) ... [2024-11-09 01:26:50,784 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:26:50" (1/1) ... [2024-11-09 01:26:50,785 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:26:50" (1/1) ... [2024-11-09 01:26:50,787 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:26:50,788 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:26:50,789 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:26:50,789 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:26:50,790 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:26:50" (1/1) ... [2024-11-09 01:26:50,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:26:50,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:26:50,828 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 01:26:50,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 01:26:50,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 01:26:50,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 01:26:50,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 01:26:50,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 01:26:50,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:26:50,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:26:50,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 01:26:50,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 01:26:50,975 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:26:50,979 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:26:51,136 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-09 01:26:51,136 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:26:51,172 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:26:51,173 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 01:26:51,173 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:26:51 BoogieIcfgContainer [2024-11-09 01:26:51,173 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:26:51,177 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 01:26:51,178 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 01:26:51,182 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 01:26:51,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:26:50" (1/3) ... [2024-11-09 01:26:51,184 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6d7468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:26:51, skipping insertion in model container [2024-11-09 01:26:51,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:26:50" (2/3) ... [2024-11-09 01:26:51,184 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6d7468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:26:51, skipping insertion in model container [2024-11-09 01:26:51,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:26:51" (3/3) ... [2024-11-09 01:26:51,186 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init2_ground-1.i [2024-11-09 01:26:51,203 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 01:26:51,203 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 01:26:51,266 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 01:26:51,274 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;@2017dd0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 01:26:51,274 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 01:26:51,281 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 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 01:26:51,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 01:26:51,290 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:26:51,291 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:26:51,292 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:26:51,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:26:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash -249157758, now seen corresponding path program 1 times [2024-11-09 01:26:51,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:26:51,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678459006] [2024-11-09 01:26:51,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:26:51,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:26:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:26:51,555 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 01:26:51,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:26:51,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678459006] [2024-11-09 01:26:51,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678459006] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:26:51,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:26:51,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:26:51,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868711438] [2024-11-09 01:26:51,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:26:51,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:26:51,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:26:51,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:26:51,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:26:51,594 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:26:51,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:26:51,649 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2024-11-09 01:26:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:26:51,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 01:26:51,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:26:51,659 INFO L225 Difference]: With dead ends: 31 [2024-11-09 01:26:51,659 INFO L226 Difference]: Without dead ends: 17 [2024-11-09 01:26:51,662 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 01:26:51,668 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:26:51,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:26:51,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-09 01:26:51,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-09 01:26:51,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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 01:26:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2024-11-09 01:26:51,703 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2024-11-09 01:26:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:26:51,704 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2024-11-09 01:26:51,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:26:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2024-11-09 01:26:51,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 01:26:51,705 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:26:51,705 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:26:51,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 01:26:51,706 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:26:51,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:26:51,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1819962196, now seen corresponding path program 1 times [2024-11-09 01:26:51,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:26:51,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137489855] [2024-11-09 01:26:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:26:51,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:26:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:26:51,841 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 01:26:51,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:26:51,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137489855] [2024-11-09 01:26:51,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137489855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:26:51,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361667756] [2024-11-09 01:26:51,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:26:51,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:26:51,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:26:51,845 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:26:51,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 01:26:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:26:51,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:26:51,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:26:51,999 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 01:26:52,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:26:52,058 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 01:26:52,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361667756] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:26:52,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [642407301] [2024-11-09 01:26:52,114 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:26:52,115 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:26:52,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:26:52,125 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:26:52,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:26:52,803 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:26:53,037 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '162#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 42)))' at error location [2024-11-09 01:26:53,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:26:53,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:26:53,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 01:26:53,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482138067] [2024-11-09 01:26:53,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:26:53,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 01:26:53,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:26:53,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 01:26:53,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-09 01:26:53,042 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:26:53,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:26:53,130 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2024-11-09 01:26:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 01:26:53,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 01:26:53,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:26:53,132 INFO L225 Difference]: With dead ends: 39 [2024-11-09 01:26:53,132 INFO L226 Difference]: Without dead ends: 27 [2024-11-09 01:26:53,133 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-09 01:26:53,135 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:26:53,136 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 17 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:26:53,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-09 01:26:53,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-09 01:26:53,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 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 01:26:53,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-11-09 01:26:53,142 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 13 [2024-11-09 01:26:53,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:26:53,143 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-11-09 01:26:53,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:26:53,144 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-11-09 01:26:53,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 01:26:53,144 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:26:53,145 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:26:53,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 01:26:53,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-09 01:26:53,346 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:26:53,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:26:53,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1306693162, now seen corresponding path program 2 times [2024-11-09 01:26:53,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:26:53,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759473361] [2024-11-09 01:26:53,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:26:53,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:26:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:26:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 01:26:53,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:26:53,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759473361] [2024-11-09 01:26:53,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759473361] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:26:53,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238323052] [2024-11-09 01:26:53,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:26:53,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:26:53,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:26:53,650 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:26:53,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 01:26:53,766 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 01:26:53,766 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:26:53,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 01:26:53,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:26:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 01:26:53,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:26:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 01:26:53,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238323052] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:26:53,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1448489107] [2024-11-09 01:26:53,924 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:26:53,925 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:26:53,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:26:53,925 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:26:53,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:26:54,228 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:26:54,416 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '417#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 42)))' at error location [2024-11-09 01:26:54,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:26:54,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:26:54,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-09 01:26:54,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7558911] [2024-11-09 01:26:54,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:26:54,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 01:26:54,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:26:54,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 01:26:54,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2024-11-09 01:26:54,423 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 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 01:26:54,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:26:54,567 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2024-11-09 01:26:54,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 01:26:54,568 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 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 01:26:54,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:26:54,570 INFO L225 Difference]: With dead ends: 68 [2024-11-09 01:26:54,570 INFO L226 Difference]: Without dead ends: 51 [2024-11-09 01:26:54,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2024-11-09 01:26:54,572 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:26:54,573 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 45 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:26:54,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-09 01:26:54,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-09 01:26:54,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.06) internal successors, (53), 50 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 01:26:54,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2024-11-09 01:26:54,583 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 25 [2024-11-09 01:26:54,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:26:54,583 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2024-11-09 01:26:54,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 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 01:26:54,584 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2024-11-09 01:26:54,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 01:26:54,585 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:26:54,585 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:26:54,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 01:26:54,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:26:54,786 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:26:54,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:26:54,787 INFO L85 PathProgramCache]: Analyzing trace with hash -837574106, now seen corresponding path program 3 times [2024-11-09 01:26:54,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:26:54,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313971745] [2024-11-09 01:26:54,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:26:54,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:26:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:26:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-09 01:26:55,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:26:55,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313971745] [2024-11-09 01:26:55,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313971745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:26:55,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209200673] [2024-11-09 01:26:55,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:26:55,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:26:55,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:26:55,366 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:26:55,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 01:26:55,507 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:26:55,507 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:26:55,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 01:26:55,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:26:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-09 01:26:55,585 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:26:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-09 01:26:55,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209200673] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:26:55,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1839509792] [2024-11-09 01:26:55,990 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:26:55,990 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:26:55,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:26:55,991 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:26:55,991 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:26:56,282 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:26:56,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '907#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 42)))' at error location [2024-11-09 01:26:56,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:26:56,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:26:56,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-09 01:26:56,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630914234] [2024-11-09 01:26:56,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:26:56,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 01:26:56,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:26:56,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 01:26:56,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=609, Unknown=0, NotChecked=0, Total=930 [2024-11-09 01:26:56,496 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 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 01:26:56,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:26:56,791 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2024-11-09 01:26:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 01:26:56,792 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 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 49 [2024-11-09 01:26:56,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:26:56,793 INFO L225 Difference]: With dead ends: 128 [2024-11-09 01:26:56,793 INFO L226 Difference]: Without dead ends: 99 [2024-11-09 01:26:56,794 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=321, Invalid=609, Unknown=0, NotChecked=0, Total=930 [2024-11-09 01:26:56,797 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 74 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:26:56,798 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 31 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:26:56,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-09 01:26:56,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-11-09 01:26:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 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 01:26:56,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2024-11-09 01:26:56,819 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 49 [2024-11-09 01:26:56,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:26:56,819 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2024-11-09 01:26:56,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 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 01:26:56,820 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2024-11-09 01:26:56,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-09 01:26:56,824 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:26:56,825 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:26:56,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 01:26:57,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:26:57,027 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:26:57,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:26:57,028 INFO L85 PathProgramCache]: Analyzing trace with hash 44846622, now seen corresponding path program 4 times [2024-11-09 01:26:57,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:26:57,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185638663] [2024-11-09 01:26:57,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:26:57,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:26:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:26:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-09 01:26:58,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:26:58,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185638663] [2024-11-09 01:26:58,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185638663] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:26:58,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586102698] [2024-11-09 01:26:58,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:26:58,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:26:58,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:26:58,244 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:26:58,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 01:26:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:26:58,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 01:26:58,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:26:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-09 01:26:58,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:26:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-09 01:26:59,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586102698] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:26:59,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [722489126] [2024-11-09 01:26:59,807 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:26:59,808 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:26:59,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:26:59,808 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:26:59,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:26:59,987 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:27:00,274 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1871#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 42)))' at error location [2024-11-09 01:27:00,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:27:00,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:27:00,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-11-09 01:27:00,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279628587] [2024-11-09 01:27:00,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:27:00,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-09 01:27:00,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:27:00,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-09 01:27:00,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1197, Invalid=1773, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 01:27:00,280 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 48 states have internal predecessors, (104), 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 01:27:00,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:27:00,964 INFO L93 Difference]: Finished difference Result 248 states and 299 transitions. [2024-11-09 01:27:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-09 01:27:00,966 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 48 states have internal predecessors, (104), 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 97 [2024-11-09 01:27:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:27:00,968 INFO L225 Difference]: With dead ends: 248 [2024-11-09 01:27:00,968 INFO L226 Difference]: Without dead ends: 195 [2024-11-09 01:27:00,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1197, Invalid=1773, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 01:27:00,971 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 122 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:27:00,972 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 59 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 01:27:00,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-09 01:27:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2024-11-09 01:27:00,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 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 01:27:00,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2024-11-09 01:27:00,990 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 97 [2024-11-09 01:27:00,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:27:00,991 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2024-11-09 01:27:00,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 48 states have internal predecessors, (104), 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 01:27:00,991 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2024-11-09 01:27:00,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2024-11-09 01:27:00,995 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:27:00,995 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:27:01,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 01:27:01,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:27:01,196 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:27:01,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:27:01,196 INFO L85 PathProgramCache]: Analyzing trace with hash -376982002, now seen corresponding path program 5 times [2024-11-09 01:27:01,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:27:01,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306736680] [2024-11-09 01:27:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:27:01,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:27:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:27:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2024-11-09 01:27:04,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:27:04,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306736680] [2024-11-09 01:27:04,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306736680] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:27:04,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476552259] [2024-11-09 01:27:04,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:27:04,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:27:04,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:27:04,990 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:27:04,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 01:32:40,078 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2024-11-09 01:32:40,079 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:32:40,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 01:32:40,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:32:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2024-11-09 01:32:40,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:32:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2024-11-09 01:32:44,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476552259] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:32:44,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [317544054] [2024-11-09 01:32:44,161 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:32:44,161 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:32:44,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:32:44,162 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:32:44,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:32:44,322 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:32:44,650 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3783#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 42)))' at error location [2024-11-09 01:32:44,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:32:44,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:32:44,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 97 [2024-11-09 01:32:44,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062753308] [2024-11-09 01:32:44,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:32:44,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-09 01:32:44,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:32:44,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-09 01:32:44,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4677, Invalid=5829, Unknown=0, NotChecked=0, Total=10506 [2024-11-09 01:32:44,660 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand has 97 states, 97 states have (on average 3.0412371134020617) internal successors, (295), 97 states have internal predecessors, (295), 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 01:32:46,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:32:46,303 INFO L93 Difference]: Finished difference Result 488 states and 587 transitions. [2024-11-09 01:32:46,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-09 01:32:46,303 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.0412371134020617) internal successors, (295), 97 states have internal predecessors, (295), 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 193 [2024-11-09 01:32:46,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:32:46,310 INFO L225 Difference]: With dead ends: 488 [2024-11-09 01:32:46,311 INFO L226 Difference]: Without dead ends: 387 [2024-11-09 01:32:46,316 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4677, Invalid=5829, Unknown=0, NotChecked=0, Total=10506 [2024-11-09 01:32:46,317 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 156 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 01:32:46,318 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 45 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 01:32:46,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-11-09 01:32:46,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2024-11-09 01:32:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0077720207253886) internal successors, (389), 386 states have internal predecessors, (389), 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 01:32:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 389 transitions. [2024-11-09 01:32:46,353 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 389 transitions. Word has length 193 [2024-11-09 01:32:46,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:32:46,354 INFO L471 AbstractCegarLoop]: Abstraction has 387 states and 389 transitions. [2024-11-09 01:32:46,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.0412371134020617) internal successors, (295), 97 states have internal predecessors, (295), 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 01:32:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 389 transitions. [2024-11-09 01:32:46,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2024-11-09 01:32:46,363 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:32:46,363 INFO L215 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:32:46,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 01:32:46,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 01:32:46,565 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:32:46,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:32:46,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1268333074, now seen corresponding path program 6 times [2024-11-09 01:32:46,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:32:46,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499897235] [2024-11-09 01:32:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:32:46,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:32:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:32:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 17672 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-11-09 01:32:56,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:32:56,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499897235] [2024-11-09 01:32:56,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499897235] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:32:56,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172057774] [2024-11-09 01:32:56,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:32:56,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:32:56,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:32:56,766 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:32:56,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 01:32:57,163 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:32:57,164 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:32:57,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 1552 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-09 01:32:57,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:32:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17672 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-11-09 01:32:57,585 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:33:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 17672 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-11-09 01:33:09,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172057774] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:33:09,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [759198912] [2024-11-09 01:33:09,919 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:33:09,920 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:33:09,920 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:33:09,920 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:33:09,921 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:33:10,070 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:33:10,618 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7591#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 42)))' at error location [2024-11-09 01:33:10,618 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:33:10,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:33:10,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2024-11-09 01:33:10,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638652432] [2024-11-09 01:33:10,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:33:10,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-11-09 01:33:10,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:33:10,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-11-09 01:33:10,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18549, Invalid=20853, Unknown=0, NotChecked=0, Total=39402 [2024-11-09 01:33:10,637 INFO L87 Difference]: Start difference. First operand 387 states and 389 transitions. Second operand has 193 states, 193 states have (on average 2.0310880829015545) internal successors, (392), 192 states have internal predecessors, (392), 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 01:33:23,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:33:23,337 INFO L93 Difference]: Finished difference Result 968 states and 1163 transitions. [2024-11-09 01:33:23,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2024-11-09 01:33:23,338 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.0310880829015545) internal successors, (392), 192 states have internal predecessors, (392), 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 385 [2024-11-09 01:33:23,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:33:23,343 INFO L225 Difference]: With dead ends: 968 [2024-11-09 01:33:23,343 INFO L226 Difference]: Without dead ends: 771 [2024-11-09 01:33:23,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1249 GetRequests, 1052 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2092 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=18549, Invalid=20853, Unknown=0, NotChecked=0, Total=39402 [2024-11-09 01:33:23,348 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 773 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:33:23,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 59 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-09 01:33:23,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2024-11-09 01:33:23,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2024-11-09 01:33:23,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.0038961038961038) internal successors, (773), 770 states have internal predecessors, (773), 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 01:33:23,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 773 transitions. [2024-11-09 01:33:23,397 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 773 transitions. Word has length 385 [2024-11-09 01:33:23,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:33:23,398 INFO L471 AbstractCegarLoop]: Abstraction has 771 states and 773 transitions. [2024-11-09 01:33:23,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.0310880829015545) internal successors, (392), 192 states have internal predecessors, (392), 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 01:33:23,399 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 773 transitions. [2024-11-09 01:33:23,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 770 [2024-11-09 01:33:23,431 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:33:23,431 INFO L215 NwaCegarLoop]: trace histogram [190, 190, 190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:33:23,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 01:33:23,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:33:23,632 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:33:23,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:33:23,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1925572014, now seen corresponding path program 7 times [2024-11-09 01:33:23,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:33:23,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639052634] [2024-11-09 01:33:23,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:33:23,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:33:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:34:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 72200 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2024-11-09 01:34:01,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:34:01,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639052634] [2024-11-09 01:34:01,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639052634] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:34:01,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005948683] [2024-11-09 01:34:01,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:34:01,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:34:01,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:34:01,503 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:34:01,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 01:34:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:34:02,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 3088 conjuncts, 192 conjuncts are in the unsatisfiable core [2024-11-09 01:34:02,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:34:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 72200 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2024-11-09 01:34:02,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:34:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 72200 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2024-11-09 01:34:57,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005948683] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:34:57,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [778359962] [2024-11-09 01:34:57,892 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:34:57,892 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:34:57,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:34:57,893 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:34:57,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:34:58,049 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:34:59,138 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15191#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 42)))' at error location [2024-11-09 01:34:59,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:34:59,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:34:59,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2024-11-09 01:34:59,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554773622] [2024-11-09 01:34:59,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:34:59,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2024-11-09 01:34:59,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:34:59,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2024-11-09 01:34:59,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73941, Invalid=78549, Unknown=0, NotChecked=0, Total=152490 [2024-11-09 01:34:59,183 INFO L87 Difference]: Start difference. First operand 771 states and 773 transitions. Second operand has 385 states, 385 states have (on average 2.0155844155844154) internal successors, (776), 384 states have internal predecessors, (776), 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 01:38:26,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:38:26,097 INFO L93 Difference]: Finished difference Result 1928 states and 2315 transitions. [2024-11-09 01:38:26,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2024-11-09 01:38:26,099 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 2.0155844155844154) internal successors, (776), 384 states have internal predecessors, (776), 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 769 [2024-11-09 01:38:26,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:38:26,108 INFO L225 Difference]: With dead ends: 1928 [2024-11-09 01:38:26,108 INFO L226 Difference]: Without dead ends: 1539 [2024-11-09 01:38:26,120 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2497 GetRequests, 2108 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4204 ImplicationChecksByTransitivity, 71.5s TimeCoverageRelationStatistics Valid=73941, Invalid=78549, Unknown=0, NotChecked=0, Total=152490 [2024-11-09 01:38:26,122 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 1959 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 2152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1959 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2152 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-09 01:38:26,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1959 Valid, 66 Invalid, 3699 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2152 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-09 01:38:26,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2024-11-09 01:38:26,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1539. [2024-11-09 01:38:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 1.0019505851755526) internal successors, (1541), 1538 states have internal predecessors, (1541), 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 01:38:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 1541 transitions. [2024-11-09 01:38:26,194 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 1541 transitions. Word has length 769 [2024-11-09 01:38:26,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:38:26,196 INFO L471 AbstractCegarLoop]: Abstraction has 1539 states and 1541 transitions. [2024-11-09 01:38:26,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 2.0155844155844154) internal successors, (776), 384 states have internal predecessors, (776), 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 01:38:26,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 1541 transitions. [2024-11-09 01:38:26,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1538 [2024-11-09 01:38:26,268 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:38:26,268 INFO L215 NwaCegarLoop]: trace histogram [382, 382, 382, 382, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:38:26,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 01:38:26,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe950519-852b-4c12-a763-e4742ddd46ee/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 01:38:26,469 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:38:26,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:38:26,470 INFO L85 PathProgramCache]: Analyzing trace with hash 839394606, now seen corresponding path program 8 times [2024-11-09 01:38:26,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:38:26,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616771164] [2024-11-09 01:38:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:38:26,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:38:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat