./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c --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_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/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_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/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_87ae7d2d-44b3-4c52-b115-0032b417ac6e/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 94a3c9718d8b0819c3a22a45f77fd4dac96406e3aa7eff964888695d6121efac --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:14:59,556 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:14:59,641 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:14:59,647 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:14:59,648 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:14:59,669 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:14:59,670 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:14:59,670 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:14:59,671 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:14:59,672 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:14:59,672 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:14:59,672 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:14:59,673 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:14:59,673 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:14:59,674 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:14:59,674 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:14:59,674 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:14:59,675 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:14:59,675 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:14:59,676 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:14:59,676 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:14:59,677 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:14:59,677 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:14:59,678 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:14:59,678 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:14:59,678 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:14:59,679 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:14:59,679 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:14:59,680 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:14:59,680 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:14:59,691 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:14:59,692 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:14:59,692 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:14:59,692 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:14:59,693 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:14:59,693 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:14:59,693 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:14:59,694 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:14:59,694 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:14:59,694 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:14:59,695 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:14:59,695 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:14:59,696 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:14:59,696 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:14:59,696 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:14:59,697 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:14:59,697 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:14:59,697 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_87ae7d2d-44b3-4c52-b115-0032b417ac6e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94a3c9718d8b0819c3a22a45f77fd4dac96406e3aa7eff964888695d6121efac [2024-11-09 05:14:59,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:14:59,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:14:59,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:14:59,995 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:14:59,995 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:14:59,996 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c Unable to find full path for "g++" [2024-11-09 05:15:01,932 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:15:02,143 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:15:02,144 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c [2024-11-09 05:15:02,153 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/data/43bd7cb63/825ead688ebd4a999fe25e55130088c8/FLAGa111c41c0 [2024-11-09 05:15:02,174 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/data/43bd7cb63/825ead688ebd4a999fe25e55130088c8 [2024-11-09 05:15:02,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:15:02,177 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:15:02,178 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:15:02,179 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:15:02,184 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:15:02,185 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:15:02" (1/1) ... [2024-11-09 05:15:02,186 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31400396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:15:02, skipping insertion in model container [2024-11-09 05:15:02,187 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:15:02" (1/1) ... [2024-11-09 05:15:02,205 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:15:02,390 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_87ae7d2d-44b3-4c52-b115-0032b417ac6e/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c[414,427] [2024-11-09 05:15:02,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:15:02,431 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:15:02,444 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_87ae7d2d-44b3-4c52-b115-0032b417ac6e/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c[414,427] [2024-11-09 05:15:02,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:15:02,471 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:15:02,472 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:15:02 WrapperNode [2024-11-09 05:15:02,472 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:15:02,473 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:15:02,473 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:15:02,473 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:15:02,481 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:15:02" (1/1) ... [2024-11-09 05:15:02,488 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:15:02" (1/1) ... [2024-11-09 05:15:02,504 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2024-11-09 05:15:02,504 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:15:02,505 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:15:02,505 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:15:02,509 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:15:02,516 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:15:02" (1/1) ... [2024-11-09 05:15:02,517 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:15:02" (1/1) ... [2024-11-09 05:15:02,518 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:15:02" (1/1) ... [2024-11-09 05:15:02,519 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:15:02" (1/1) ... [2024-11-09 05:15:02,524 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:15:02" (1/1) ... [2024-11-09 05:15:02,528 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:15:02" (1/1) ... [2024-11-09 05:15:02,529 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:15:02" (1/1) ... [2024-11-09 05:15:02,530 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:15:02" (1/1) ... [2024-11-09 05:15:02,532 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:15:02,533 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:15:02,533 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:15:02,533 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:15:02,534 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:15:02" (1/1) ... [2024-11-09 05:15:02,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:15:02,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:15:02,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:15:02,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:15:02,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:15:02,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:15:02,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:15:02,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:15:02,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:15:02,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:15:02,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:15:02,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:15:02,665 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:15:02,667 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:15:02,831 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-09 05:15:02,832 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:15:02,890 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:15:02,891 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:15:02,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:15:02 BoogieIcfgContainer [2024-11-09 05:15:02,897 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:15:02,899 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:15:02,899 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:15:02,904 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:15:02,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:15:02" (1/3) ... [2024-11-09 05:15:02,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@266af73d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:15:02, skipping insertion in model container [2024-11-09 05:15:02,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:15:02" (2/3) ... [2024-11-09 05:15:02,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@266af73d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:15:02, skipping insertion in model container [2024-11-09 05:15:02,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:15:02" (3/3) ... [2024-11-09 05:15:02,907 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr.c [2024-11-09 05:15:02,927 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:15:02,928 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:15:02,996 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:15:03,003 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;@47b72065, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:15:03,003 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:15:03,007 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 05:15:03,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 05:15:03,014 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:15:03,015 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:15:03,015 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:15:03,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:15:03,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1422976009, now seen corresponding path program 1 times [2024-11-09 05:15:03,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:15:03,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661212937] [2024-11-09 05:15:03,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:15:03,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:15:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:15:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:15:03,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:15:03,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661212937] [2024-11-09 05:15:03,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661212937] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:15:03,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:15:03,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:15:03,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605729389] [2024-11-09 05:15:03,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:15:03,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:15:03,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:15:03,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:15:03,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:15:03,323 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 05:15:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:15:03,385 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2024-11-09 05:15:03,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:15:03,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 05:15:03,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:15:03,401 INFO L225 Difference]: With dead ends: 29 [2024-11-09 05:15:03,401 INFO L226 Difference]: Without dead ends: 15 [2024-11-09 05:15:03,403 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:15:03,406 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:15:03,407 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:15:03,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-09 05:15:03,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-09 05:15:03,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:03,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2024-11-09 05:15:03,442 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 9 [2024-11-09 05:15:03,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:15:03,443 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2024-11-09 05:15:03,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:03,443 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2024-11-09 05:15:03,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 05:15:03,444 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:15:03,444 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:15:03,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:15:03,445 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:15:03,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:15:03,446 INFO L85 PathProgramCache]: Analyzing trace with hash 390822022, now seen corresponding path program 1 times [2024-11-09 05:15:03,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:15:03,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506892399] [2024-11-09 05:15:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:15:03,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:15:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:15:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:15:03,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:15:03,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506892399] [2024-11-09 05:15:03,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506892399] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:15:03,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:15:03,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:15:03,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917668632] [2024-11-09 05:15:03,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:15:03,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:15:03,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:15:03,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:15:03,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:15:03,701 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:03,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:15:03,764 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2024-11-09 05:15:03,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:15:03,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-09 05:15:03,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:15:03,766 INFO L225 Difference]: With dead ends: 24 [2024-11-09 05:15:03,766 INFO L226 Difference]: Without dead ends: 17 [2024-11-09 05:15:03,766 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:15:03,768 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:15:03,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 9 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:15:03,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-09 05:15:03,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-09 05:15:03,773 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 05:15:03,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2024-11-09 05:15:03,774 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2024-11-09 05:15:03,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:15:03,774 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2024-11-09 05:15:03,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:03,774 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2024-11-09 05:15:03,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 05:15:03,775 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:15:03,775 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:15:03,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:15:03,776 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:15:03,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:15:03,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1127305013, now seen corresponding path program 1 times [2024-11-09 05:15:03,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:15:03,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876197455] [2024-11-09 05:15:03,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:15:03,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:15:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:15:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:15:03,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:15:03,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876197455] [2024-11-09 05:15:03,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876197455] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:15:03,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764660792] [2024-11-09 05:15:03,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:15:03,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:15:03,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:15:04,001 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:15:04,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:15:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:15:04,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:15:04,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:15:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:15:04,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:15:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:15:04,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764660792] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:15:04,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1668834163] [2024-11-09 05:15:04,324 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:15:04,325 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:15:04,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:15:04,336 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:15:04,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:15:05,261 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:15:05,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '213#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 |ULTIMATE.start_main_~#c~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) 4) 0)) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= 100000 ~N~0))' at error location [2024-11-09 05:15:05,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:15:05,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:15:05,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-09 05:15:05,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587665607] [2024-11-09 05:15:05,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:15:05,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:15:05,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:15:05,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:15:05,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:15:05,566 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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 05:15:05,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:15:05,639 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2024-11-09 05:15:05,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:15:05,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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) Word has length 13 [2024-11-09 05:15:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:15:05,640 INFO L225 Difference]: With dead ends: 34 [2024-11-09 05:15:05,642 INFO L226 Difference]: Without dead ends: 22 [2024-11-09 05:15:05,642 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:15:05,643 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:15:05,645 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 15 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:15:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-09 05:15:05,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-11-09 05:15:05,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-11-09 05:15:05,652 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2024-11-09 05:15:05,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:15:05,652 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-11-09 05:15:05,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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 05:15:05,653 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-11-09 05:15:05,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 05:15:05,654 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:15:05,654 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:15:05,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:15:05,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:15:05,855 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:15:05,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:15:05,856 INFO L85 PathProgramCache]: Analyzing trace with hash -361232126, now seen corresponding path program 2 times [2024-11-09 05:15:05,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:15:05,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775351974] [2024-11-09 05:15:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:15:05,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:15:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:15:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:15:06,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:15:06,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775351974] [2024-11-09 05:15:06,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775351974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:15:06,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935847371] [2024-11-09 05:15:06,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:15:06,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:15:06,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:15:06,153 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:15:06,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:15:06,235 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:15:06,236 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:15:06,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:15:06,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:15:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:15:06,303 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:15:06,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:15:06,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935847371] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:15:06,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [836424380] [2024-11-09 05:15:06,367 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:15:06,367 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:15:06,368 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:15:06,368 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:15:06,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:15:06,937 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:15:07,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '415#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 |ULTIMATE.start_main_~#c~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) 4) 0)) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= 100000 ~N~0))' at error location [2024-11-09 05:15:07,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:15:07,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:15:07,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2024-11-09 05:15:07,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935264065] [2024-11-09 05:15:07,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:15:07,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:15:07,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:15:07,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:15:07,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:15:07,248 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:07,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:15:07,512 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2024-11-09 05:15:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 05:15:07,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-09 05:15:07,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:15:07,513 INFO L225 Difference]: With dead ends: 81 [2024-11-09 05:15:07,514 INFO L226 Difference]: Without dead ends: 70 [2024-11-09 05:15:07,514 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2024-11-09 05:15:07,515 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 116 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:15:07,515 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 26 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:15:07,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-09 05:15:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 39. [2024-11-09 05:15:07,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2024-11-09 05:15:07,532 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 19 [2024-11-09 05:15:07,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:15:07,532 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2024-11-09 05:15:07,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:07,532 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2024-11-09 05:15:07,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-09 05:15:07,535 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:15:07,535 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:15:07,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:15:07,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:15:07,736 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:15:07,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:15:07,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1950892631, now seen corresponding path program 3 times [2024-11-09 05:15:07,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:15:07,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470951691] [2024-11-09 05:15:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:15:07,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:15:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:15:08,097 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-09 05:15:08,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:15:08,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470951691] [2024-11-09 05:15:08,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470951691] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:15:08,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827244212] [2024-11-09 05:15:08,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:15:08,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:15:08,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:15:08,103 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:15:08,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:15:08,258 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:15:08,258 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:15:08,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 05:15:08,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:15:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-09 05:15:08,487 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:15:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-09 05:15:08,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827244212] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:15:08,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2002502533] [2024-11-09 05:15:08,719 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:15:08,719 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:15:08,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:15:08,720 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:15:08,720 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:15:09,130 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:15:09,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '839#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 |ULTIMATE.start_main_~#c~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) 4) 0)) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= 100000 ~N~0))' at error location [2024-11-09 05:15:09,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:15:09,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:15:09,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2024-11-09 05:15:09,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406668313] [2024-11-09 05:15:09,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:15:09,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 05:15:09,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:15:09,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 05:15:09,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=748, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 05:15:09,521 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:10,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:15:10,053 INFO L93 Difference]: Finished difference Result 183 states and 204 transitions. [2024-11-09 05:15:10,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 05:15:10,054 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-09 05:15:10,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:15:10,056 INFO L225 Difference]: With dead ends: 183 [2024-11-09 05:15:10,056 INFO L226 Difference]: Without dead ends: 160 [2024-11-09 05:15:10,057 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 78 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=635, Invalid=1171, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 05:15:10,058 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 336 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:15:10,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 65 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:15:10,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-09 05:15:10,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 75. [2024-11-09 05:15:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2024-11-09 05:15:10,075 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 37 [2024-11-09 05:15:10,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:15:10,075 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2024-11-09 05:15:10,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2024-11-09 05:15:10,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-09 05:15:10,077 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:15:10,078 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:15:10,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 05:15:10,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:15:10,283 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:15:10,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:15:10,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1266591785, now seen corresponding path program 4 times [2024-11-09 05:15:10,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:15:10,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29997352] [2024-11-09 05:15:10,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:15:10,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:15:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:15:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-09 05:15:11,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:15:11,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29997352] [2024-11-09 05:15:11,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29997352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:15:11,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581107760] [2024-11-09 05:15:11,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:15:11,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:15:11,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:15:11,157 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:15:11,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:15:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:15:11,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 05:15:11,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:15:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-09 05:15:11,797 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:15:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-09 05:15:12,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581107760] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:15:12,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [350301512] [2024-11-09 05:15:12,480 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:15:12,480 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:15:12,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:15:12,481 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:15:12,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:15:12,987 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:15:13,388 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1699#(and (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 ~N~0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| 4)) 0)))' at error location [2024-11-09 05:15:13,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:15:13,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:15:13,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2024-11-09 05:15:13,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281366353] [2024-11-09 05:15:13,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:15:13,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-09 05:15:13,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:15:13,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-09 05:15:13,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1284, Invalid=2498, Unknown=0, NotChecked=0, Total=3782 [2024-11-09 05:15:13,393 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:13,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:15:13,628 INFO L93 Difference]: Finished difference Result 152 states and 173 transitions. [2024-11-09 05:15:13,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-09 05:15:13,630 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-11-09 05:15:13,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:15:13,631 INFO L225 Difference]: With dead ends: 152 [2024-11-09 05:15:13,631 INFO L226 Difference]: Without dead ends: 111 [2024-11-09 05:15:13,635 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1881 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1284, Invalid=2498, Unknown=0, NotChecked=0, Total=3782 [2024-11-09 05:15:13,636 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:15:13,636 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:15:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-09 05:15:13,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-11-09 05:15:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2024-11-09 05:15:13,649 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 73 [2024-11-09 05:15:13,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:15:13,650 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2024-11-09 05:15:13,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2024-11-09 05:15:13,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-09 05:15:13,653 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:15:13,653 INFO L215 NwaCegarLoop]: trace histogram [34, 34, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:15:13,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:15:13,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:15:13,854 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:15:13,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:15:13,855 INFO L85 PathProgramCache]: Analyzing trace with hash -723652685, now seen corresponding path program 5 times [2024-11-09 05:15:13,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:15:13,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370658549] [2024-11-09 05:15:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:15:13,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:15:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:15:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-09 05:15:16,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:15:16,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370658549] [2024-11-09 05:15:16,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370658549] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:15:16,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717016628] [2024-11-09 05:15:16,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:15:16,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:15:16,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:15:16,343 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:15:16,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:15:31,172 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-09 05:15:31,172 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:15:31,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 05:15:31,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:15:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2024-11-09 05:15:31,736 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:15:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2024-11-09 05:15:32,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717016628] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:15:32,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1048015370] [2024-11-09 05:15:32,859 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:15:32,859 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:15:32,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:15:32,860 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:15:32,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:15:33,311 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:15:33,804 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2816#(and (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 ~N~0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| 4)) 0)))' at error location [2024-11-09 05:15:33,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:15:33,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:15:33,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 19, 19] total 72 [2024-11-09 05:15:33,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310002783] [2024-11-09 05:15:33,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:15:33,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-09 05:15:33,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:15:33,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-09 05:15:33,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2456, Invalid=4186, Unknown=0, NotChecked=0, Total=6642 [2024-11-09 05:15:33,810 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 72 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:37,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:15:37,072 INFO L93 Difference]: Finished difference Result 561 states and 618 transitions. [2024-11-09 05:15:37,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-09 05:15:37,073 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 72 states have internal predecessors, (155), 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 109 [2024-11-09 05:15:37,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:15:37,078 INFO L225 Difference]: With dead ends: 561 [2024-11-09 05:15:37,078 INFO L226 Difference]: Without dead ends: 520 [2024-11-09 05:15:37,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4288 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4452, Invalid=9120, Unknown=0, NotChecked=0, Total=13572 [2024-11-09 05:15:37,085 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 1579 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1579 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:15:37,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1579 Valid, 176 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 05:15:37,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2024-11-09 05:15:37,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 219. [2024-11-09 05:15:37,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.0137614678899083) internal successors, (221), 218 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:37,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2024-11-09 05:15:37,122 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 109 [2024-11-09 05:15:37,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:15:37,123 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2024-11-09 05:15:37,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 72 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:15:37,127 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2024-11-09 05:15:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2024-11-09 05:15:37,135 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:15:37,135 INFO L215 NwaCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:15:37,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:15:37,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:15:37,336 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:15:37,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:15:37,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1129395855, now seen corresponding path program 6 times [2024-11-09 05:15:37,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:15:37,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470027598] [2024-11-09 05:15:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:15:37,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:15:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:15:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5408 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 2704 trivial. 0 not checked. [2024-11-09 05:15:42,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:15:42,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470027598] [2024-11-09 05:15:42,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470027598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:15:42,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717301149] [2024-11-09 05:15:42,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:15:42,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:15:42,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:15:42,382 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:15:42,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ae7d2d-44b3-4c52-b115-0032b417ac6e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process