./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2 --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 783ac259376d0d4b331b84c9ee3bd0ed2042af56d21e98db70a8bebb07aee3c2 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:27:54,114 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:27:54,210 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:27:54,216 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:27:54,220 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:27:54,253 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:27:54,253 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:27:54,254 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:27:54,254 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:27:54,255 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:27:54,255 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:27:54,255 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:27:54,256 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:27:54,259 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:27:54,259 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:27:54,260 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:27:54,260 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:27:54,260 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:27:54,261 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:27:54,261 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:27:54,261 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:27:54,262 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:27:54,266 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:27:54,267 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:27:54,267 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:27:54,267 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:27:54,267 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:27:54,268 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:27:54,268 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:27:54,268 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:27:54,268 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:27:54,269 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:27:54,269 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:27:54,269 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:27:54,269 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:27:54,270 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:27:54,271 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:27:54,271 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:27:54,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:27:54,272 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:27:54,272 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:27:54,273 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:27:54,273 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:27:54,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:27:54,273 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:27:54,274 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:27:54,274 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:27:54,274 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_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 783ac259376d0d4b331b84c9ee3bd0ed2042af56d21e98db70a8bebb07aee3c2 [2024-11-02 12:27:54,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:27:54,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:27:54,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:27:54,619 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:27:54,620 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:27:54,621 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i Unable to find full path for "g++" [2024-11-02 12:27:56,565 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:27:56,830 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:27:56,831 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i [2024-11-02 12:27:56,840 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/data/8b10fe4ae/0683d91c689344d9bd1fbeb28448b4ee/FLAGf08457709 [2024-11-02 12:27:56,858 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/data/8b10fe4ae/0683d91c689344d9bd1fbeb28448b4ee [2024-11-02 12:27:56,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:27:56,864 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:27:56,866 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:27:56,866 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:27:56,872 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:27:56,873 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:27:56" (1/1) ... [2024-11-02 12:27:56,876 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40983602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:56, skipping insertion in model container [2024-11-02 12:27:56,877 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:27:56" (1/1) ... [2024-11-02 12:27:56,903 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:27:57,126 WARN L251 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_d3476f23-f412-4f47-9942-b8653c256bca/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i[815,828] [2024-11-02 12:27:57,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:27:57,157 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:27:57,172 WARN L251 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_d3476f23-f412-4f47-9942-b8653c256bca/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i[815,828] [2024-11-02 12:27:57,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:27:57,206 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:27:57,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:57 WrapperNode [2024-11-02 12:27:57,206 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:27:57,208 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:27:57,208 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:27:57,208 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:27:57,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:57" (1/1) ... [2024-11-02 12:27:57,224 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:57" (1/1) ... [2024-11-02 12:27:57,249 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2024-11-02 12:27:57,249 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:27:57,250 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:27:57,250 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:27:57,250 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:27:57,260 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:57" (1/1) ... [2024-11-02 12:27:57,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:57" (1/1) ... [2024-11-02 12:27:57,262 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:57" (1/1) ... [2024-11-02 12:27:57,263 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:57" (1/1) ... [2024-11-02 12:27:57,274 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:57" (1/1) ... [2024-11-02 12:27:57,277 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:57" (1/1) ... [2024-11-02 12:27:57,279 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:57" (1/1) ... [2024-11-02 12:27:57,284 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:57" (1/1) ... [2024-11-02 12:27:57,285 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:27:57,286 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:27:57,289 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:27:57,289 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:27:57,290 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:57" (1/1) ... [2024-11-02 12:27:57,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:27:57,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:57,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:27:57,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:27:57,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:27:57,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:27:57,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:27:57,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:27:57,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:27:57,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:27:57,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:27:57,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:27:57,443 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:27:57,445 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:27:57,618 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-02 12:27:57,618 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:27:57,693 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:27:57,694 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 12:27:57,694 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:27:57 BoogieIcfgContainer [2024-11-02 12:27:57,694 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:27:57,697 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:27:57,697 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:27:57,702 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:27:57,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:27:56" (1/3) ... [2024-11-02 12:27:57,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d35ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:27:57, skipping insertion in model container [2024-11-02 12:27:57,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:57" (2/3) ... [2024-11-02 12:27:57,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d35ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:27:57, skipping insertion in model container [2024-11-02 12:27:57,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:27:57" (3/3) ... [2024-11-02 12:27:57,706 INFO L112 eAbstractionObserver]: Analyzing ICFG array_single_elem_init.i [2024-11-02 12:27:57,726 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:27:57,727 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:27:57,789 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:27:57,796 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;@5d3a9305, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:27:57,797 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:27:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:57,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 12:27:57,808 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:57,809 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-02 12:27:57,809 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:57,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:57,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1333724918, now seen corresponding path program 1 times [2024-11-02 12:27:57,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:57,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932813813] [2024-11-02 12:27:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:57,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:58,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:58,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932813813] [2024-11-02 12:27:58,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932813813] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:58,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:27:58,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:27:58,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133266744] [2024-11-02 12:27:58,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:58,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:27:58,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:58,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:27:58,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:27:58,201 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2024-11-02 12:27:58,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:58,277 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2024-11-02 12:27:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:27:58,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2024-11-02 12:27:58,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:58,287 INFO L225 Difference]: With dead ends: 22 [2024-11-02 12:27:58,288 INFO L226 Difference]: Without dead ends: 13 [2024-11-02 12:27:58,290 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 [2024-11-02 12:27:58,296 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:58,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:27:58,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-02 12:27:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2024-11-02 12:27:58,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:58,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2024-11-02 12:27:58,330 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2024-11-02 12:27:58,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:58,331 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2024-11-02 12:27:58,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2024-11-02 12:27:58,331 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2024-11-02 12:27:58,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-02 12:27:58,332 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:58,332 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:58,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:27:58,332 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:58,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:58,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1705809046, now seen corresponding path program 1 times [2024-11-02 12:27:58,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:58,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810710495] [2024-11-02 12:27:58,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:58,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:27:58,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:58,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810710495] [2024-11-02 12:27:58,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810710495] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:58,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515901481] [2024-11-02 12:27:58,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:58,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:58,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:58,586 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:58,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:27:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:58,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:27:58,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:27:58,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:27:58,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515901481] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:27:58,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [948883322] [2024-11-02 12:27:58,864 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:27:58,865 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:27:58,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:27:58,873 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:27:58,874 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:27:59,727 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:27:59,847 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '122#(and (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ 60000 |ULTIMATE.start_main_~#c~0#1.offset|)) 0)) (= 15000 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-02 12:27:59,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:27:59,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:27:59,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-02 12:27:59,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961769666] [2024-11-02 12:27:59,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:27:59,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:27:59,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:59,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:27:59,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:27:59,854 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:59,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:59,940 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2024-11-02 12:27:59,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:27:59,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-02 12:27:59,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:59,942 INFO L225 Difference]: With dead ends: 32 [2024-11-02 12:27:59,942 INFO L226 Difference]: Without dead ends: 23 [2024-11-02 12:27:59,942 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:27:59,944 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:59,944 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 12 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:27:59,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-02 12:27:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2024-11-02 12:27:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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) [2024-11-02 12:27:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-11-02 12:27:59,949 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2024-11-02 12:27:59,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:59,949 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-11-02 12:27:59,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:59,950 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-11-02 12:27:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-02 12:27:59,950 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:59,950 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2024-11-02 12:27:59,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:28:00,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:00,152 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:00,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:00,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1872168074, now seen corresponding path program 2 times [2024-11-02 12:28:00,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:00,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149432236] [2024-11-02 12:28:00,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:00,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:28:00,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:00,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149432236] [2024-11-02 12:28:00,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149432236] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:00,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667947062] [2024-11-02 12:28:00,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:28:00,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:00,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:00,452 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:00,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:28:00,604 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 12:28:00,605 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:28:00,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 12:28:00,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:28:00,652 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:28:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:28:00,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667947062] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:28:00,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1425715269] [2024-11-02 12:28:00,771 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:28:00,775 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:28:00,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:28:00,776 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:28:00,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:28:01,240 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:28:01,473 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '300#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#c~0#1.base|) (= 15000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) 60000) 0)) (= |ULTIMATE.start_main_~#c~0#1.offset| 0))' at error location [2024-11-02 12:28:01,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:28:01,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:28:01,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2024-11-02 12:28:01,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940940177] [2024-11-02 12:28:01,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:28:01,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-02 12:28:01,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:01,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-02 12:28:01,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2024-11-02 12:28:01,480 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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) [2024-11-02 12:28:01,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:01,618 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2024-11-02 12:28:01,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 12:28:01,619 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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) Word has length 16 [2024-11-02 12:28:01,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:01,621 INFO L225 Difference]: With dead ends: 59 [2024-11-02 12:28:01,621 INFO L226 Difference]: Without dead ends: 47 [2024-11-02 12:28:01,622 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2024-11-02 12:28:01,625 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:01,628 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 16 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:28:01,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-02 12:28:01,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2024-11-02 12:28:01,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:01,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2024-11-02 12:28:01,638 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 16 [2024-11-02 12:28:01,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:01,638 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2024-11-02 12:28:01,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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) [2024-11-02 12:28:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2024-11-02 12:28:01,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-02 12:28:01,640 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:01,640 INFO L215 NwaCegarLoop]: trace histogram [10, 6, 5, 5, 1, 1, 1, 1, 1] [2024-11-02 12:28:01,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:28:01,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:01,845 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:01,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:01,845 INFO L85 PathProgramCache]: Analyzing trace with hash -2058494354, now seen corresponding path program 3 times [2024-11-02 12:28:01,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:01,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140765633] [2024-11-02 12:28:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:01,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-02 12:28:02,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:02,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140765633] [2024-11-02 12:28:02,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140765633] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:02,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032079724] [2024-11-02 12:28:02,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:28:02,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:02,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:02,237 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:02,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:28:02,414 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:28:02,414 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:28:02,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 12:28:02,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-02 12:28:02,466 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:28:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-02 12:28:02,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032079724] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:28:02,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [564331641] [2024-11-02 12:28:02,599 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:28:02,600 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:28:02,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:28:02,601 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:28:02,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:28:02,977 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:28:03,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '635#(and (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ 60000 |ULTIMATE.start_main_~#c~0#1.offset|)) 0)) (= 15000 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-02 12:28:03,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:28:03,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:28:03,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-02 12:28:03,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62910876] [2024-11-02 12:28:03,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:28:03,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-02 12:28:03,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:03,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-02 12:28:03,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2024-11-02 12:28:03,058 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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) [2024-11-02 12:28:03,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:03,194 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2024-11-02 12:28:03,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-02 12:28:03,195 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-02 12:28:03,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:03,196 INFO L225 Difference]: With dead ends: 78 [2024-11-02 12:28:03,196 INFO L226 Difference]: Without dead ends: 57 [2024-11-02 12:28:03,196 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2024-11-02 12:28:03,197 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:03,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:28:03,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-02 12:28:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-11-02 12:28:03,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 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) [2024-11-02 12:28:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2024-11-02 12:28:03,205 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 31 [2024-11-02 12:28:03,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:03,206 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2024-11-02 12:28:03,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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) [2024-11-02 12:28:03,206 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2024-11-02 12:28:03,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 12:28:03,207 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:03,207 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1] [2024-11-02 12:28:03,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 12:28:03,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:03,412 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:03,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:03,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1561918474, now seen corresponding path program 4 times [2024-11-02 12:28:03,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:03,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654727849] [2024-11-02 12:28:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:03,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-02 12:28:04,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:04,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654727849] [2024-11-02 12:28:04,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654727849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:04,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204506741] [2024-11-02 12:28:04,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-02 12:28:04,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:04,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:04,113 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:04,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:28:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:04,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-02 12:28:04,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-02 12:28:04,368 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:28:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-02 12:28:04,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204506741] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:28:04,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [384389137] [2024-11-02 12:28:04,728 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:28:04,728 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:28:04,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:28:04,729 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:28:04,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:28:05,080 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:28:05,199 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1179#(and (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ 60000 |ULTIMATE.start_main_~#c~0#1.offset|)) 0)) (= 15000 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-02 12:28:05,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:28:05,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:28:05,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 29 [2024-11-02 12:28:05,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529473387] [2024-11-02 12:28:05,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:28:05,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-02 12:28:05,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:05,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-02 12:28:05,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=668, Unknown=0, NotChecked=0, Total=1122 [2024-11-02 12:28:05,206 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 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) [2024-11-02 12:28:05,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:05,518 INFO L93 Difference]: Finished difference Result 153 states and 183 transitions. [2024-11-02 12:28:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-02 12:28:05,519 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 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 54 [2024-11-02 12:28:05,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:05,520 INFO L225 Difference]: With dead ends: 153 [2024-11-02 12:28:05,520 INFO L226 Difference]: Without dead ends: 111 [2024-11-02 12:28:05,521 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=454, Invalid=668, Unknown=0, NotChecked=0, Total=1122 [2024-11-02 12:28:05,522 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:05,522 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 16 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:28:05,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-02 12:28:05,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 73. [2024-11-02 12:28:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 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) [2024-11-02 12:28:05,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2024-11-02 12:28:05,531 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 54 [2024-11-02 12:28:05,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:05,532 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2024-11-02 12:28:05,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 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) [2024-11-02 12:28:05,532 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2024-11-02 12:28:05,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-02 12:28:05,534 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:05,534 INFO L215 NwaCegarLoop]: trace histogram [26, 14, 13, 13, 1, 1, 1, 1, 1] [2024-11-02 12:28:05,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-02 12:28:05,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:05,739 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:05,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:05,739 INFO L85 PathProgramCache]: Analyzing trace with hash -676614034, now seen corresponding path program 5 times [2024-11-02 12:28:05,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:05,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784868176] [2024-11-02 12:28:05,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:05,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-02 12:28:06,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:06,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784868176] [2024-11-02 12:28:06,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784868176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:06,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977670567] [2024-11-02 12:28:06,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:28:06,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:06,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:06,769 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:06,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3476f23-f412-4f47-9942-b8653c256bca/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process