./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label27.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label27.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 37a936c68c2366e8e771de8327d485af323f29b99aee8e4d5b84781c604b5939 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:42:27,634 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:42:27,725 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:42:27,731 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:42:27,733 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:42:27,760 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:42:27,761 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:42:27,762 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:42:27,763 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:42:27,764 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:42:27,765 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:42:27,765 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:42:27,766 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:42:27,767 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:42:27,767 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:42:27,769 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:42:27,770 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:42:27,770 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:42:27,770 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:42:27,771 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:42:27,771 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:42:27,772 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:42:27,776 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:42:27,777 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:42:27,777 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:42:27,777 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:42:27,777 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:42:27,778 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:42:27,778 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:42:27,778 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:42:27,778 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:42:27,778 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:42:27,779 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:42:27,779 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:42:27,780 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:42:27,781 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:42:27,782 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:42:27,782 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:42:27,782 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:42:27,783 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:42:27,783 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:42:27,783 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:42:27,784 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:42:27,784 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:42:27,785 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:42:27,785 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:42:27,786 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:42:27,786 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_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37a936c68c2366e8e771de8327d485af323f29b99aee8e4d5b84781c604b5939 [2024-11-09 05:42:28,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:42:28,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:42:28,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:42:28,114 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:42:28,115 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:42:28,116 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/eca-rers2012/Problem14_label27.c Unable to find full path for "g++" [2024-11-09 05:42:30,126 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:42:30,389 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:42:30,390 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/sv-benchmarks/c/eca-rers2012/Problem14_label27.c [2024-11-09 05:42:30,404 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/data/48ebf8234/646de0e578344f739b7ac452344f8630/FLAG771517d21 [2024-11-09 05:42:30,433 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/data/48ebf8234/646de0e578344f739b7ac452344f8630 [2024-11-09 05:42:30,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:42:30,438 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:42:30,439 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:42:30,440 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:42:30,445 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:42:30,448 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:42:30" (1/1) ... [2024-11-09 05:42:30,449 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f0998e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:30, skipping insertion in model container [2024-11-09 05:42:30,450 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:42:30" (1/1) ... [2024-11-09 05:42:30,513 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:42:30,731 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/sv-benchmarks/c/eca-rers2012/Problem14_label27.c[3158,3171] [2024-11-09 05:42:30,979 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:42:30,990 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:42:31,019 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/sv-benchmarks/c/eca-rers2012/Problem14_label27.c[3158,3171] [2024-11-09 05:42:31,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:42:31,262 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:42:31,263 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:31 WrapperNode [2024-11-09 05:42:31,263 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:42:31,264 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:42:31,264 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:42:31,265 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:42:31,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:31" (1/1) ... [2024-11-09 05:42:31,302 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:31" (1/1) ... [2024-11-09 05:42:31,407 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 858 [2024-11-09 05:42:31,408 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:42:31,408 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:42:31,409 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:42:31,409 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:42:31,418 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:31" (1/1) ... [2024-11-09 05:42:31,419 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:31" (1/1) ... [2024-11-09 05:42:31,430 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:31" (1/1) ... [2024-11-09 05:42:31,430 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:31" (1/1) ... [2024-11-09 05:42:31,469 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:31" (1/1) ... [2024-11-09 05:42:31,477 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:31" (1/1) ... [2024-11-09 05:42:31,482 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:31" (1/1) ... [2024-11-09 05:42:31,488 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:31" (1/1) ... [2024-11-09 05:42:31,497 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:42:31,498 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:42:31,498 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:42:31,498 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:42:31,499 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:31" (1/1) ... [2024-11-09 05:42:31,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:42:31,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:42:31,539 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:42:31,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:42:31,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:42:31,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:42:31,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:42:31,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:42:31,638 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:42:31,641 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:42:33,160 INFO L? ?]: Removed 123 outVars from TransFormulas that were not future-live. [2024-11-09 05:42:33,160 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:42:38,678 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:42:38,679 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 05:42:38,679 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:42:38 BoogieIcfgContainer [2024-11-09 05:42:38,679 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:42:38,682 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:42:38,682 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:42:38,685 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:42:38,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:42:30" (1/3) ... [2024-11-09 05:42:38,687 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab94189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:42:38, skipping insertion in model container [2024-11-09 05:42:38,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:42:31" (2/3) ... [2024-11-09 05:42:38,687 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab94189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:42:38, skipping insertion in model container [2024-11-09 05:42:38,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:42:38" (3/3) ... [2024-11-09 05:42:38,689 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label27.c [2024-11-09 05:42:38,707 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:42:38,708 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:42:38,768 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:42:38,775 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;@6804a281, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:42:38,775 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:42:38,779 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) 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) [2024-11-09 05:42:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-09 05:42:38,785 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:38,786 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 05:42:38,787 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:42:38,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:38,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1057137218, now seen corresponding path program 1 times [2024-11-09 05:42:38,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:38,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803458299] [2024-11-09 05:42:38,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:38,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:39,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:39,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803458299] [2024-11-09 05:42:39,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803458299] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:42:39,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:42:39,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:42:39,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997358136] [2024-11-09 05:42:39,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:42:39,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:42:39,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:42:39,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:42:39,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:42:39,080 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:39,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:39,308 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2024-11-09 05:42:39,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:42:39,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2024-11-09 05:42:39,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:39,320 INFO L225 Difference]: With dead ends: 23 [2024-11-09 05:42:39,320 INFO L226 Difference]: Without dead ends: 11 [2024-11-09 05:42:39,323 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:42:39,330 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:39,331 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:42:39,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-11-09 05:42:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2024-11-09 05:42:39,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:39,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2024-11-09 05:42:39,366 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2024-11-09 05:42:39,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:39,367 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2024-11-09 05:42:39,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:39,368 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2024-11-09 05:42:39,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 05:42:39,369 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:39,370 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-09 05:42:39,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:42:39,371 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:42:39,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:39,372 INFO L85 PathProgramCache]: Analyzing trace with hash 738844336, now seen corresponding path program 1 times [2024-11-09 05:42:39,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:39,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971678062] [2024-11-09 05:42:39,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:39,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:43:07,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:07,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971678062] [2024-11-09 05:43:07,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971678062] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:07,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228911561] [2024-11-09 05:43:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:07,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:07,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:07,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:07,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:43:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:07,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:43:07,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:43:10,133 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:43:34,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228911561] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:34,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1087518439] [2024-11-09 05:43:34,950 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-09 05:43:34,950 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:34,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:34,960 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:34,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:36,224 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 25 [2024-11-09 05:43:36,979 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 21684 conjunctions. This might take some time... [2024-11-09 05:43:38,867 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 576 conjunctions. [2024-11-09 05:43:38,889 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 25 [2024-11-09 05:43:39,316 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 21684 conjunctions. This might take some time... [2024-11-09 05:43:41,159 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 576 conjunctions. [2024-11-09 05:48:26,121 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2024-11-09 05:48:26,308 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 10518 conjunctions. This might take some time... [2024-11-09 05:48:26,683 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 288 conjunctions. [2024-11-09 05:48:26,687 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2024-11-09 05:48:26,900 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 10518 conjunctions. This might take some time... [2024-11-09 05:48:27,245 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 288 conjunctions. [2024-11-09 05:54:57,672 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2024-11-09 05:54:57,869 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 10518 conjunctions. This might take some time... [2024-11-09 05:54:58,212 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 288 conjunctions. [2024-11-09 05:54:58,215 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2024-11-09 05:54:58,368 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 10518 conjunctions. This might take some time... [2024-11-09 05:54:58,719 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 288 conjunctions. [2024-11-09 05:54:58,808 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2024-11-09 05:54:58,985 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 10518 conjunctions. This might take some time... [2024-11-09 05:54:59,334 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 288 conjunctions. [2024-11-09 05:54:59,385 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2024-11-09 05:54:59,534 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 10518 conjunctions. This might take some time... [2024-11-09 05:54:59,881 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 288 conjunctions. [2024-11-09 05:54:59,915 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:54:59,991 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '111#(and (<= ~a12~0 11) (= ~a24~0 1) (= ~a21~0 9) (or (= |ULTIMATE.start_calculate_output_~input#1| 6) (= |ULTIMATE.start_calculate_output_~input#1| 2) (= |ULTIMATE.start_calculate_output_~input#1| 1) (= |ULTIMATE.start_calculate_output_~input#1| 3) (= |ULTIMATE.start_calculate_output_~input#1| 4) (= |ULTIMATE.start_calculate_output_~input#1| 5)) (<= 0 (+ ~a12~0 42)) (= ~a15~0 6))' at error location [2024-11-09 05:54:59,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:54:59,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:54:59,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-09 05:54:59,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111446111] [2024-11-09 05:54:59,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:54:59,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:54:59,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:54:59,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:54:59,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-09 05:54:59,996 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:55:00,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:55:00,197 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2024-11-09 05:55:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:55:00,198 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 05:55:00,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:55:00,199 INFO L225 Difference]: With dead ends: 17 [2024-11-09 05:55:00,199 INFO L226 Difference]: Without dead ends: 15 [2024-11-09 05:55:00,200 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:55:00,202 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:55:00,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 13 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:55:00,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-09 05:55:00,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2024-11-09 05:55:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:55:00,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2024-11-09 05:55:00,208 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2024-11-09 05:55:00,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:55:00,208 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2024-11-09 05:55:00,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:55:00,209 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2024-11-09 05:55:00,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 05:55:00,210 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:55:00,210 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1] [2024-11-09 05:55:00,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:55:00,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:00,411 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:55:00,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:55:00,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1860094946, now seen corresponding path program 2 times [2024-11-09 05:55:00,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:55:00,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311702887] [2024-11-09 05:55:00,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:00,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:55:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:55:48,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:55:48,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311702887] [2024-11-09 05:55:48,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311702887] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:55:48,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466671278] [2024-11-09 05:55:48,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:55:48,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:48,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:55:48,558 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:55:48,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf630dd-f9e5-48e2-9fbf-bf5ddbafbdd1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:55:48,775 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 05:55:48,775 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:55:48,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 05:55:48,802 INFO L278 TraceCheckSpWp]: Computing forward predicates...