./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_two_index_06.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_06.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 546735c0067535a8d85828f81b1865de283f7216ce884b530d67889cc8b321c4 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:36:59,974 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:37:00,061 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:37:00,069 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:37:00,069 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:37:00,102 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:37:00,105 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:37:00,106 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:37:00,107 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:37:00,108 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:37:00,108 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:37:00,109 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:37:00,109 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:37:00,110 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:37:00,112 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:37:00,113 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:37:00,113 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:37:00,114 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:37:00,114 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:37:00,114 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:37:00,114 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:37:00,119 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:37:00,120 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:37:00,120 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:37:00,120 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:37:00,120 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:37:00,121 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:37:00,121 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:37:00,121 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:37:00,121 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:37:00,122 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:37:00,122 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:37:00,122 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:37:00,122 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:37:00,122 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:37:00,123 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:37:00,123 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:37:00,123 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:37:00,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:37:00,124 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:37:00,124 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:37:00,127 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:37:00,127 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:37:00,128 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:37:00,128 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:37:00,128 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:37:00,128 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:37:00,128 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_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 546735c0067535a8d85828f81b1865de283f7216ce884b530d67889cc8b321c4 [2024-11-02 12:37:00,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:37:00,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:37:00,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:37:00,473 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:37:00,474 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:37:00,475 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/array-examples/standard_two_index_06.i Unable to find full path for "g++" [2024-11-02 12:37:02,787 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:37:03,029 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:37:03,029 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/sv-benchmarks/c/array-examples/standard_two_index_06.i [2024-11-02 12:37:03,042 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/data/e96def52f/ae4628a2ecfc4182bb099e5a77f0c0ff/FLAG53d291a50 [2024-11-02 12:37:03,391 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/data/e96def52f/ae4628a2ecfc4182bb099e5a77f0c0ff [2024-11-02 12:37:03,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:37:03,397 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:37:03,399 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:37:03,400 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:37:03,408 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:37:03,409 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:37:03" (1/1) ... [2024-11-02 12:37:03,413 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51bab0de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:03, skipping insertion in model container [2024-11-02 12:37:03,414 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:37:03" (1/1) ... [2024-11-02 12:37:03,443 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:37:03,835 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/sv-benchmarks/c/array-examples/standard_two_index_06.i[814,827] [2024-11-02 12:37:03,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:37:03,904 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:37:03,923 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/sv-benchmarks/c/array-examples/standard_two_index_06.i[814,827] [2024-11-02 12:37:03,947 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:37:03,982 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:37:03,983 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:03 WrapperNode [2024-11-02 12:37:03,983 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:37:03,985 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:37:03,985 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:37:03,985 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:37:03,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:03" (1/1) ... [2024-11-02 12:37:04,004 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:03" (1/1) ... [2024-11-02 12:37:04,036 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2024-11-02 12:37:04,036 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:37:04,037 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:37:04,037 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:37:04,038 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:37:04,063 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:03" (1/1) ... [2024-11-02 12:37:04,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:03" (1/1) ... [2024-11-02 12:37:04,065 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:03" (1/1) ... [2024-11-02 12:37:04,065 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:03" (1/1) ... [2024-11-02 12:37:04,072 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:03" (1/1) ... [2024-11-02 12:37:04,077 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:03" (1/1) ... [2024-11-02 12:37:04,078 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:03" (1/1) ... [2024-11-02 12:37:04,079 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:03" (1/1) ... [2024-11-02 12:37:04,081 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:37:04,082 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:37:04,083 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:37:04,083 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:37:04,084 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:03" (1/1) ... [2024-11-02 12:37:04,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:37:04,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:04,129 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:37:04,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:37:04,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:37:04,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:37:04,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:37:04,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:37:04,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:37:04,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:37:04,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:37:04,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:37:04,269 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:37:04,272 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:37:04,506 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-02 12:37:04,506 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:37:04,581 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:37:04,581 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-02 12:37:04,582 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:37:04 BoogieIcfgContainer [2024-11-02 12:37:04,582 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:37:04,587 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:37:04,587 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:37:04,592 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:37:04,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:37:03" (1/3) ... [2024-11-02 12:37:04,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116c0394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:37:04, skipping insertion in model container [2024-11-02 12:37:04,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:03" (2/3) ... [2024-11-02 12:37:04,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116c0394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:37:04, skipping insertion in model container [2024-11-02 12:37:04,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:37:04" (3/3) ... [2024-11-02 12:37:04,598 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_06.i [2024-11-02 12:37:04,620 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:37:04,620 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:37:04,711 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:37:04,720 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;@5eeaa091, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:37:04,720 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:37:04,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:04,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 12:37:04,734 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:04,735 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-02 12:37:04,735 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:04,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:04,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1745982706, now seen corresponding path program 1 times [2024-11-02 12:37:04,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:04,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235352366] [2024-11-02 12:37:04,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:04,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:05,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:05,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235352366] [2024-11-02 12:37:05,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235352366] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:37:05,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:37:05,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:37:05,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375551488] [2024-11-02 12:37:05,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:37:05,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:37:05,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:05,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:37:05,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:37:05,072 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:05,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:05,180 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2024-11-02 12:37:05,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:37:05,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-02 12:37:05,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:05,196 INFO L225 Difference]: With dead ends: 17 [2024-11-02 12:37:05,196 INFO L226 Difference]: Without dead ends: 9 [2024-11-02 12:37:05,199 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:37:05,206 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:05,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:37:05,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-11-02 12:37:05,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2024-11-02 12:37:05,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 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) [2024-11-02 12:37:05,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2024-11-02 12:37:05,268 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2024-11-02 12:37:05,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:05,268 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2024-11-02 12:37:05,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:05,269 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2024-11-02 12:37:05,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 12:37:05,269 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:05,270 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:37:05,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:37:05,270 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:05,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:05,271 INFO L85 PathProgramCache]: Analyzing trace with hash 276578033, now seen corresponding path program 1 times [2024-11-02 12:37:05,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:05,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124704177] [2024-11-02 12:37:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:05,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:05,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:05,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124704177] [2024-11-02 12:37:05,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124704177] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:05,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409772460] [2024-11-02 12:37:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:05,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:05,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:05,451 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:05,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:37:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:05,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:37:05,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:37:05,570 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:37:05,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409772460] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:37:05,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:37:05,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2024-11-02 12:37:05,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824820304] [2024-11-02 12:37:05,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:37:05,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:37:05,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:05,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:37:05,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:37:05,574 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:05,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:05,607 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2024-11-02 12:37:05,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:37:05,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-02 12:37:05,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:05,608 INFO L225 Difference]: With dead ends: 20 [2024-11-02 12:37:05,608 INFO L226 Difference]: Without dead ends: 15 [2024-11-02 12:37:05,609 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:37:05,611 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:05,611 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:37:05,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-02 12:37:05,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2024-11-02 12:37:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2024-11-02 12:37:05,616 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2024-11-02 12:37:05,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:05,616 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2024-11-02 12:37:05,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:05,617 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2024-11-02 12:37:05,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-02 12:37:05,620 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:05,621 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:37:05,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:37:05,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:05,822 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:05,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:05,823 INFO L85 PathProgramCache]: Analyzing trace with hash -51261225, now seen corresponding path program 1 times [2024-11-02 12:37:05,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:05,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835674184] [2024-11-02 12:37:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:05,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:05,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:37:05,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:05,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835674184] [2024-11-02 12:37:05,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835674184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:05,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739160266] [2024-11-02 12:37:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:05,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:05,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:05,928 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:05,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:37:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:06,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:37:06,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:37:06,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:37:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:37:06,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739160266] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:37:06,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1575522584] [2024-11-02 12:37:06,141 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-02 12:37:06,141 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:37:06,146 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:37:06,153 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:37:06,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:37:06,797 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:37:07,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '166#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |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_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-02 12:37:07,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:37:07,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:37:07,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-02 12:37:07,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491640179] [2024-11-02 12:37:07,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:37:07,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:37:07,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:07,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:37:07,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:37:07,043 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:07,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:07,091 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2024-11-02 12:37:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:37:07,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-02 12:37:07,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:07,093 INFO L225 Difference]: With dead ends: 31 [2024-11-02 12:37:07,093 INFO L226 Difference]: Without dead ends: 24 [2024-11-02 12:37:07,094 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:37:07,095 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:07,096 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:37:07,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-02 12:37:07,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2024-11-02 12:37:07,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2024-11-02 12:37:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-11-02 12:37:07,101 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2024-11-02 12:37:07,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:07,101 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-11-02 12:37:07,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:07,102 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-11-02 12:37:07,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 12:37:07,102 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:07,103 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2024-11-02 12:37:07,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:37:07,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:07,308 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:07,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:07,312 INFO L85 PathProgramCache]: Analyzing trace with hash 490227022, now seen corresponding path program 2 times [2024-11-02 12:37:07,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:07,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133836995] [2024-11-02 12:37:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:07,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:37:07,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:07,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133836995] [2024-11-02 12:37:07,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133836995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:07,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701554965] [2024-11-02 12:37:07,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:37:07,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:07,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:07,547 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:07,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:37:07,649 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-02 12:37:07,650 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:37:07,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 12:37:07,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:37:07,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:37:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:37:07,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701554965] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:37:07,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1579038063] [2024-11-02 12:37:07,736 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-02 12:37:07,737 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:37:07,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:37:07,737 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:37:07,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:37:08,104 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:37:08,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '314#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |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_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-02 12:37:08,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:37:08,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:37:08,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-02 12:37:08,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216369849] [2024-11-02 12:37:08,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:37:08,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 12:37:08,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:08,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 12:37:08,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2024-11-02 12:37:08,334 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:08,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:08,419 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2024-11-02 12:37:08,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 12:37:08,420 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 [2024-11-02 12:37:08,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:08,421 INFO L225 Difference]: With dead ends: 54 [2024-11-02 12:37:08,421 INFO L226 Difference]: Without dead ends: 46 [2024-11-02 12:37:08,421 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2024-11-02 12:37:08,422 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:08,423 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 21 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:37:08,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-02 12:37:08,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2024-11-02 12:37:08,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:08,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-11-02 12:37:08,430 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2024-11-02 12:37:08,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:08,431 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-11-02 12:37:08,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:08,432 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-11-02 12:37:08,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-02 12:37:08,433 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:08,434 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2024-11-02 12:37:08,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 12:37:08,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:08,639 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:08,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:08,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1077845166, now seen corresponding path program 3 times [2024-11-02 12:37:08,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:08,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430077234] [2024-11-02 12:37:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:08,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 12:37:08,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:08,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430077234] [2024-11-02 12:37:08,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430077234] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:08,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337528992] [2024-11-02 12:37:08,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:37:08,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:08,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:08,946 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:08,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:37:09,044 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:37:09,045 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:37:09,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 12:37:09,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 12:37:09,132 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:37:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 12:37:09,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337528992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:37:09,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1478798748] [2024-11-02 12:37:09,268 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-02 12:37:09,268 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:37:09,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:37:09,269 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:37:09,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:37:09,452 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:37:09,650 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '558#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |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_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-02 12:37:09,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:37:09,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:37:09,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-11-02 12:37:09,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903309445] [2024-11-02 12:37:09,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:37:09,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-02 12:37:09,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:09,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-02 12:37:09,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2024-11-02 12:37:09,653 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:09,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:09,814 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2024-11-02 12:37:09,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-02 12:37:09,814 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 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 18 [2024-11-02 12:37:09,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:09,815 INFO L225 Difference]: With dead ends: 90 [2024-11-02 12:37:09,815 INFO L226 Difference]: Without dead ends: 78 [2024-11-02 12:37:09,816 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2024-11-02 12:37:09,816 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 88 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:09,817 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 39 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:37:09,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-02 12:37:09,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 37. [2024-11-02 12:37:09,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:09,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2024-11-02 12:37:09,829 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 18 [2024-11-02 12:37:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:09,829 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2024-11-02 12:37:09,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2024-11-02 12:37:09,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-02 12:37:09,831 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:09,831 INFO L215 NwaCegarLoop]: trace histogram [20, 9, 1, 1, 1, 1, 1, 1] [2024-11-02 12:37:09,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 12:37:10,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:10,032 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:10,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:10,032 INFO L85 PathProgramCache]: Analyzing trace with hash 985962138, now seen corresponding path program 4 times [2024-11-02 12:37:10,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:10,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170781749] [2024-11-02 12:37:10,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:10,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-02 12:37:10,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:10,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170781749] [2024-11-02 12:37:10,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170781749] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:10,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892464068] [2024-11-02 12:37:10,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-02 12:37:10,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:10,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:10,444 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:10,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:37:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:10,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-02 12:37:10,607 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-02 12:37:10,877 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:37:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-02 12:37:11,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892464068] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:37:11,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1912550426] [2024-11-02 12:37:11,617 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-02 12:37:11,617 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:37:11,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:37:11,618 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:37:11,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:37:11,823 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:37:12,061 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1026#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |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_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-02 12:37:12,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:37:12,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:37:12,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22, 22] total 51 [2024-11-02 12:37:12,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37269852] [2024-11-02 12:37:12,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:37:12,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-02 12:37:12,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:12,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-02 12:37:12,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2024-11-02 12:37:12,067 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 51 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:12,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:12,436 INFO L93 Difference]: Finished difference Result 155 states and 191 transitions. [2024-11-02 12:37:12,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-02 12:37:12,437 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 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 35 [2024-11-02 12:37:12,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:12,438 INFO L225 Difference]: With dead ends: 155 [2024-11-02 12:37:12,439 INFO L226 Difference]: Without dead ends: 140 [2024-11-02 12:37:12,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2024-11-02 12:37:12,441 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 175 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:12,442 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 75 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:37:12,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-02 12:37:12,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 70. [2024-11-02 12:37:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:12,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2024-11-02 12:37:12,454 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 35 [2024-11-02 12:37:12,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:12,454 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2024-11-02 12:37:12,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:12,455 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2024-11-02 12:37:12,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-02 12:37:12,457 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:12,457 INFO L215 NwaCegarLoop]: trace histogram [48, 14, 1, 1, 1, 1, 1, 1] [2024-11-02 12:37:12,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-02 12:37:12,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:12,662 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:12,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:12,664 INFO L85 PathProgramCache]: Analyzing trace with hash 586167950, now seen corresponding path program 5 times [2024-11-02 12:37:12,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:12,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11242238] [2024-11-02 12:37:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:12,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2024-11-02 12:37:13,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:13,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11242238] [2024-11-02 12:37:13,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11242238] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:13,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230433282] [2024-11-02 12:37:13,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:37:13,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:13,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:13,606 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:13,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 12:37:17,675 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-02 12:37:17,676 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:37:17,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-02 12:37:17,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2024-11-02 12:37:17,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:37:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2024-11-02 12:37:18,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230433282] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:37:18,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1389979576] [2024-11-02 12:37:18,227 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-02 12:37:18,227 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:37:18,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:37:18,228 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:37:18,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:37:18,470 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:37:18,715 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1846#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |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_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-02 12:37:18,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:37:18,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:37:18,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-11-02 12:37:18,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27590294] [2024-11-02 12:37:18,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:37:18,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-02 12:37:18,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:18,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-02 12:37:18,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=767, Unknown=0, NotChecked=0, Total=1406 [2024-11-02 12:37:18,724 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:19,225 INFO L93 Difference]: Finished difference Result 237 states and 255 transitions. [2024-11-02 12:37:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-02 12:37:19,226 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 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 68 [2024-11-02 12:37:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:19,230 INFO L225 Difference]: With dead ends: 237 [2024-11-02 12:37:19,231 INFO L226 Difference]: Without dead ends: 232 [2024-11-02 12:37:19,235 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=639, Invalid=767, Unknown=0, NotChecked=0, Total=1406 [2024-11-02 12:37:19,236 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 276 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:19,237 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 90 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 12:37:19,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-02 12:37:19,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 86. [2024-11-02 12:37:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.035294117647059) internal successors, (88), 85 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2024-11-02 12:37:19,262 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 68 [2024-11-02 12:37:19,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:19,264 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2024-11-02 12:37:19,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:19,265 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2024-11-02 12:37:19,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-02 12:37:19,269 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:19,269 INFO L215 NwaCegarLoop]: trace histogram [48, 30, 1, 1, 1, 1, 1, 1] [2024-11-02 12:37:19,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-02 12:37:19,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:19,470 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:19,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:19,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1720974706, now seen corresponding path program 6 times [2024-11-02 12:37:19,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:19,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381785385] [2024-11-02 12:37:19,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:19,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2024-11-02 12:37:21,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:21,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381785385] [2024-11-02 12:37:21,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381785385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:21,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624154349] [2024-11-02 12:37:21,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:37:21,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:21,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:21,121 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:21,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-02 12:37:21,445 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:37:21,446 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:37:21,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-02 12:37:21,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2024-11-02 12:37:22,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:37:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2024-11-02 12:37:25,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624154349] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:37:25,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [439461594] [2024-11-02 12:37:25,610 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-02 12:37:25,610 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:37:25,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:37:25,611 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:37:25,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:37:25,777 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:37:25,997 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2989#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |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_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-02 12:37:25,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:37:25,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:37:25,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 50, 50] total 124 [2024-11-02 12:37:25,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041756888] [2024-11-02 12:37:25,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:37:25,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2024-11-02 12:37:25,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:26,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2024-11-02 12:37:26,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8006, Invalid=8506, Unknown=0, NotChecked=0, Total=16512 [2024-11-02 12:37:26,008 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 124 states, 124 states have (on average 1.1209677419354838) internal successors, (139), 124 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:27,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:27,708 INFO L93 Difference]: Finished difference Result 401 states and 487 transitions. [2024-11-02 12:37:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2024-11-02 12:37:27,709 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.1209677419354838) internal successors, (139), 124 states have internal predecessors, (139), 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 84 [2024-11-02 12:37:27,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:27,711 INFO L225 Difference]: With dead ends: 401 [2024-11-02 12:37:27,711 INFO L226 Difference]: Without dead ends: 365 [2024-11-02 12:37:27,719 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8958 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=8006, Invalid=8506, Unknown=0, NotChecked=0, Total=16512 [2024-11-02 12:37:27,720 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 988 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:27,721 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 180 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-02 12:37:27,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2024-11-02 12:37:27,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 169. [2024-11-02 12:37:27,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0178571428571428) internal successors, (171), 168 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2024-11-02 12:37:27,754 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 84 [2024-11-02 12:37:27,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:27,758 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2024-11-02 12:37:27,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.1209677419354838) internal successors, (139), 124 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:27,759 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2024-11-02 12:37:27,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-02 12:37:27,761 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:27,765 INFO L215 NwaCegarLoop]: trace histogram [121, 40, 1, 1, 1, 1, 1, 1] [2024-11-02 12:37:27,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-02 12:37:27,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:27,966 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:27,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:27,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1052538737, now seen corresponding path program 7 times [2024-11-02 12:37:27,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:27,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105696542] [2024-11-02 12:37:27,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:27,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8201 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2024-11-02 12:37:31,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:31,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105696542] [2024-11-02 12:37:31,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105696542] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:31,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250829687] [2024-11-02 12:37:31,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-02 12:37:31,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:31,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:31,527 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:31,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c28f2a-27c6-4d40-9db6-07c5f356833f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process