./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init4_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init4_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E --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 84dd450b83ffc0eda27ceeda48a4324978aec0ffc3f50cf64d7cfe4a88062bda --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:01:14,725 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:01:14,853 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:01:14,863 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:01:14,864 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:01:14,923 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:01:14,924 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:01:14,924 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:01:14,925 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:01:14,925 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:01:14,926 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:01:14,926 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:01:14,926 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:01:14,926 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:01:14,927 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:01:14,927 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:01:14,927 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:01:14,927 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:01:14,927 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:01:14,928 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:01:14,928 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:01:14,928 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:01:14,928 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:01:14,929 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:01:14,929 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:01:14,929 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:01:14,929 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:01:14,929 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:01:14,929 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:01:14,930 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:01:14,930 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:01:14,931 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:01:14,931 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:01:14,931 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:01:14,931 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:01:14,932 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:01:14,932 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:01:14,932 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:01:14,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:01:14,933 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:01:14,933 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:01:14,933 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:01:14,933 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:01:14,934 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:01:14,934 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:01:14,934 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:01:14,934 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:01:14,934 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E 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 -> 84dd450b83ffc0eda27ceeda48a4324978aec0ffc3f50cf64d7cfe4a88062bda [2024-11-14 04:01:15,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:01:15,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:01:15,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:01:15,487 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:01:15,488 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:01:15,490 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-examples/standard_init4_ground-1.i Unable to find full path for "g++" [2024-11-14 04:01:18,266 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:01:18,798 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:01:18,799 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/sv-benchmarks/c/array-examples/standard_init4_ground-1.i [2024-11-14 04:01:18,821 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/data/5827d9169/c30cf8b345764e2b81ff86d069817d68/FLAG449ef3315 [2024-11-14 04:01:18,848 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/data/5827d9169/c30cf8b345764e2b81ff86d069817d68 [2024-11-14 04:01:18,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:01:18,853 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:01:18,855 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:01:18,855 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:01:18,862 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:01:18,863 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:01:18" (1/1) ... [2024-11-14 04:01:18,866 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ab67a20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:18, skipping insertion in model container [2024-11-14 04:01:18,867 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:01:18" (1/1) ... [2024-11-14 04:01:18,883 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:01:19,053 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_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/sv-benchmarks/c/array-examples/standard_init4_ground-1.i[816,829] [2024-11-14 04:01:19,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:01:19,090 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:01:19,108 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_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/sv-benchmarks/c/array-examples/standard_init4_ground-1.i[816,829] [2024-11-14 04:01:19,124 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:01:19,158 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:01:19,158 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:19 WrapperNode [2024-11-14 04:01:19,159 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:01:19,162 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:01:19,162 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:01:19,162 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:01:19,175 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:19" (1/1) ... [2024-11-14 04:01:19,185 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:19" (1/1) ... [2024-11-14 04:01:19,212 INFO L138 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2024-11-14 04:01:19,215 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:01:19,216 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:01:19,216 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:01:19,217 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:01:19,228 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:19" (1/1) ... [2024-11-14 04:01:19,230 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:19" (1/1) ... [2024-11-14 04:01:19,232 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:19" (1/1) ... [2024-11-14 04:01:19,236 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:19" (1/1) ... [2024-11-14 04:01:19,246 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:19" (1/1) ... [2024-11-14 04:01:19,254 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:19" (1/1) ... [2024-11-14 04:01:19,262 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:19" (1/1) ... [2024-11-14 04:01:19,263 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:19" (1/1) ... [2024-11-14 04:01:19,266 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:01:19,270 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:01:19,271 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:01:19,271 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:01:19,272 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:19" (1/1) ... [2024-11-14 04:01:19,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:01:19,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:01:19,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:01:19,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:01:19,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:01:19,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:01:19,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 04:01:19,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:01:19,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:01:19,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:01:19,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:01:19,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:01:19,507 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:01:19,510 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:01:19,691 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-14 04:01:19,692 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:01:19,765 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:01:19,766 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-14 04:01:19,766 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:01:19 BoogieIcfgContainer [2024-11-14 04:01:19,766 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:01:19,771 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:01:19,771 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:01:19,778 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:01:19,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:01:18" (1/3) ... [2024-11-14 04:01:19,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d173641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:01:19, skipping insertion in model container [2024-11-14 04:01:19,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:19" (2/3) ... [2024-11-14 04:01:19,780 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d173641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:01:19, skipping insertion in model container [2024-11-14 04:01:19,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:01:19" (3/3) ... [2024-11-14 04:01:19,782 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-1.i [2024-11-14 04:01:19,806 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:01:19,809 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_init4_ground-1.i that has 1 procedures, 11 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-11-14 04:01:19,885 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:01:19,904 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;@66c0cd52, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:01:19,904 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:01:19,910 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:01:19,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 04:01:19,919 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:01:19,920 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:01:19,921 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:01:19,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:01:19,927 INFO L85 PathProgramCache]: Analyzing trace with hash -968329162, now seen corresponding path program 1 times [2024-11-14 04:01:19,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:01:19,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794005907] [2024-11-14 04:01:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:01:19,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:01:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:01:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:01:20,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:01:20,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794005907] [2024-11-14 04:01:20,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794005907] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:01:20,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:01:20,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:01:20,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497815770] [2024-11-14 04:01:20,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:01:20,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:01:20,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:01:20,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:01:20,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:01:20,266 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2024-11-14 04:01:20,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:01:20,406 INFO L93 Difference]: Finished difference Result 24 states and 37 transitions. [2024-11-14 04:01:20,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:01:20,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2024-11-14 04:01:20,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:01:20,430 INFO L225 Difference]: With dead ends: 24 [2024-11-14 04:01:20,431 INFO L226 Difference]: Without dead ends: 14 [2024-11-14 04:01:20,436 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 [2024-11-14 04:01:20,447 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:01:20,449 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:01:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-14 04:01:20,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-14 04:01:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:01:20,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2024-11-14 04:01:20,506 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2024-11-14 04:01:20,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:01:20,509 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2024-11-14 04:01:20,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2024-11-14 04:01:20,510 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2024-11-14 04:01:20,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 04:01:20,511 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:01:20,511 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:01:20,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:01:20,515 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:01:20,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:01:20,516 INFO L85 PathProgramCache]: Analyzing trace with hash 2062305358, now seen corresponding path program 1 times [2024-11-14 04:01:20,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:01:20,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668164824] [2024-11-14 04:01:20,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:01:20,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:01:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:01:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:01:20,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:01:20,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668164824] [2024-11-14 04:01:20,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668164824] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:01:20,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33944178] [2024-11-14 04:01:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:01:20,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:01:20,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:01:20,811 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:01:20,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:01:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:01:20,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:01:20,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:01:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:01:21,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:01:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:01:21,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33944178] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:01:21,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1106766211] [2024-11-14 04:01:21,157 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:01:21,158 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:01:21,163 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:01:21,171 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:01:21,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:01:21,982 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:01:22,205 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '152#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 46)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-14 04:01:22,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:01:22,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:01:22,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-14 04:01:22,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681267542] [2024-11-14 04:01:22,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:01:22,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:01:22,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:01:22,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:01:22,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-14 04:01:22,212 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:01:22,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:01:22,396 INFO L93 Difference]: Finished difference Result 37 states and 56 transitions. [2024-11-14 04:01:22,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:01:22,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-14 04:01:22,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:01:22,398 INFO L225 Difference]: With dead ends: 37 [2024-11-14 04:01:22,399 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 04:01:22,400 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-14 04:01:22,403 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:01:22,404 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:01:22,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 04:01:22,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-14 04:01:22,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:01:22,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-14 04:01:22,422 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 12 [2024-11-14 04:01:22,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:01:22,422 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-14 04:01:22,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:01:22,423 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-14 04:01:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 04:01:22,425 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:01:22,425 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:01:22,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 04:01:22,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-14 04:01:22,627 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:01:22,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:01:22,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1397431754, now seen corresponding path program 2 times [2024-11-14 04:01:22,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:01:22,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682359415] [2024-11-14 04:01:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:01:22,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:01:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:01:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-14 04:01:23,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:01:23,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682359415] [2024-11-14 04:01:23,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682359415] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:01:23,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637775098] [2024-11-14 04:01:23,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:01:23,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:01:23,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:01:23,230 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:01:23,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:01:23,417 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:01:23,417 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:01:23,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:01:23,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:01:23,476 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-14 04:01:23,477 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:01:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-14 04:01:23,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637775098] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:01:23,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1972737382] [2024-11-14 04:01:23,651 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:01:23,654 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:01:23,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:01:23,655 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:01:23,655 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:01:24,144 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:01:24,324 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '419#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 46)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-14 04:01:24,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:01:24,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:01:24,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2024-11-14 04:01:24,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224891613] [2024-11-14 04:01:24,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:01:24,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 04:01:24,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:01:24,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 04:01:24,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:01:24,329 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:01:24,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:01:24,646 INFO L93 Difference]: Finished difference Result 70 states and 101 transitions. [2024-11-14 04:01:24,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 04:01:24,647 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-14 04:01:24,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:01:24,649 INFO L225 Difference]: With dead ends: 70 [2024-11-14 04:01:24,649 INFO L226 Difference]: Without dead ends: 50 [2024-11-14 04:01:24,650 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:01:24,651 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:01:24,652 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:01:24,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-14 04:01:24,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-14 04:01:24,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:01:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-11-14 04:01:24,665 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 24 [2024-11-14 04:01:24,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:01:24,666 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-11-14 04:01:24,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:01:24,666 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-11-14 04:01:24,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 04:01:24,668 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:01:24,668 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:01:24,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:01:24,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-14 04:01:24,874 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:01:24,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:01:24,875 INFO L85 PathProgramCache]: Analyzing trace with hash 551657782, now seen corresponding path program 3 times [2024-11-14 04:01:24,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:01:24,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722561435] [2024-11-14 04:01:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:01:24,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:01:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:01:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2024-11-14 04:01:26,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:01:26,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722561435] [2024-11-14 04:01:26,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722561435] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:01:26,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179014535] [2024-11-14 04:01:26,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:01:26,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:01:26,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:01:26,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:01:26,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:01:26,276 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:01:26,276 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:01:26,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 04:01:26,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:01:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2024-11-14 04:01:26,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:01:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2024-11-14 04:01:26,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179014535] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:01:26,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [803718534] [2024-11-14 04:01:26,902 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:01:26,902 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:01:26,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:01:26,903 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:01:26,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:01:27,339 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:01:27,566 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '956#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 46)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-14 04:01:27,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:01:27,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:01:27,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-14 04:01:27,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492782958] [2024-11-14 04:01:27,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:01:27,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 04:01:27,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:01:27,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 04:01:27,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=502, Unknown=0, NotChecked=0, Total=812 [2024-11-14 04:01:27,573 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 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) [2024-11-14 04:01:28,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:01:28,245 INFO L93 Difference]: Finished difference Result 136 states and 191 transitions. [2024-11-14 04:01:28,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 04:01:28,246 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 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 48 [2024-11-14 04:01:28,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:01:28,248 INFO L225 Difference]: With dead ends: 136 [2024-11-14 04:01:28,248 INFO L226 Difference]: Without dead ends: 98 [2024-11-14 04:01:28,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=310, Invalid=502, Unknown=0, NotChecked=0, Total=812 [2024-11-14 04:01:28,251 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:01:28,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:01:28,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-14 04:01:28,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2024-11-14 04:01:28,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:01:28,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2024-11-14 04:01:28,275 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 48 [2024-11-14 04:01:28,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:01:28,277 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2024-11-14 04:01:28,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 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) [2024-11-14 04:01:28,281 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2024-11-14 04:01:28,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-14 04:01:28,286 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:01:28,287 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:01:28,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 04:01:28,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:01:28,488 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:01:28,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:01:28,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1600364746, now seen corresponding path program 4 times [2024-11-14 04:01:28,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:01:28,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925215954] [2024-11-14 04:01:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:01:28,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:01:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:01:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2024-11-14 04:01:30,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:01:30,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925215954] [2024-11-14 04:01:30,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925215954] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:01:30,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066901283] [2024-11-14 04:01:30,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:01:30,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:01:30,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:01:30,625 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:01:30,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:01:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:01:31,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 04:01:31,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:01:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2024-11-14 04:01:31,230 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:01:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2024-11-14 04:01:32,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066901283] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:01:32,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1934883663] [2024-11-14 04:01:32,844 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:01:32,845 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:01:32,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:01:32,845 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:01:32,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:01:33,069 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:01:33,277 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2033#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 46)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-14 04:01:33,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:01:33,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:01:33,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-11-14 04:01:33,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061764479] [2024-11-14 04:01:33,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:01:33,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 04:01:33,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:01:33,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 04:01:33,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1186, Invalid=1570, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 04:01:33,284 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 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) [2024-11-14 04:01:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:01:34,385 INFO L93 Difference]: Finished difference Result 268 states and 371 transitions. [2024-11-14 04:01:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 04:01:34,386 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 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 96 [2024-11-14 04:01:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:01:34,388 INFO L225 Difference]: With dead ends: 268 [2024-11-14 04:01:34,388 INFO L226 Difference]: Without dead ends: 194 [2024-11-14 04:01:34,391 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1186, Invalid=1570, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 04:01:34,392 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:01:34,392 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 04:01:34,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-11-14 04:01:34,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2024-11-14 04:01:34,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 193 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:01:34,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2024-11-14 04:01:34,421 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 96 [2024-11-14 04:01:34,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:01:34,422 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2024-11-14 04:01:34,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 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) [2024-11-14 04:01:34,423 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2024-11-14 04:01:34,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-11-14 04:01:34,428 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:01:34,428 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:01:34,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:01:34,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:01:34,633 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:01:34,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:01:34,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1003936566, now seen corresponding path program 5 times [2024-11-14 04:01:34,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:01:34,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625578446] [2024-11-14 04:01:34,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:01:34,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:01:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:01:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2024-11-14 04:01:40,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:01:40,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625578446] [2024-11-14 04:01:40,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625578446] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:01:40,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448674253] [2024-11-14 04:01:40,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:01:40,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:01:40,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:01:40,552 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:01:40,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f772e9a-ea5d-422b-8e65-de9a1da6cb7a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process