./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/count_by_k.i --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_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/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_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_k.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/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_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/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 ee41851a84d57c0c483c2a5edf48180b7c141c1991cdc82f0d66c6775eb49f5b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:55:33,326 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:55:33,416 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:55:33,423 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:55:33,427 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:55:33,472 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:55:33,473 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:55:33,473 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:55:33,474 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:55:33,475 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:55:33,476 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:55:33,476 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:55:33,477 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:55:33,478 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:55:33,479 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:55:33,479 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:55:33,479 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:55:33,480 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:55:33,480 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:55:33,480 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:55:33,481 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:55:33,481 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:55:33,482 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:55:33,482 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:55:33,486 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:55:33,487 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:55:33,487 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:55:33,487 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:55:33,487 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:55:33,488 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:55:33,488 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:55:33,488 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:55:33,488 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:55:33,489 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:55:33,489 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:55:33,489 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:55:33,489 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:55:33,490 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:55:33,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:55:33,492 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:55:33,493 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:55:33,494 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:55:33,494 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:55:33,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:55:33,494 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:55:33,495 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:55:33,495 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:55:33,495 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_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee41851a84d57c0c483c2a5edf48180b7c141c1991cdc82f0d66c6775eb49f5b [2024-11-09 05:55:33,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:55:33,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:55:33,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:55:33,877 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:55:33,878 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:55:33,879 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/loop-new/count_by_k.i Unable to find full path for "g++" [2024-11-09 05:55:35,881 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:55:36,073 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:55:36,073 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/sv-benchmarks/c/loop-new/count_by_k.i [2024-11-09 05:55:36,081 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/data/4c592d0c7/19eb4bf4bca74620908a659cd16c8b94/FLAG0ddf94546 [2024-11-09 05:55:36,462 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/data/4c592d0c7/19eb4bf4bca74620908a659cd16c8b94 [2024-11-09 05:55:36,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:55:36,467 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:55:36,468 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:55:36,468 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:55:36,475 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:55:36,476 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:55:36" (1/1) ... [2024-11-09 05:55:36,477 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c865ef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:55:36, skipping insertion in model container [2024-11-09 05:55:36,478 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:55:36" (1/1) ... [2024-11-09 05:55:36,498 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:55:36,812 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_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/sv-benchmarks/c/loop-new/count_by_k.i[891,904] [2024-11-09 05:55:36,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:55:36,844 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:55:36,862 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_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/sv-benchmarks/c/loop-new/count_by_k.i[891,904] [2024-11-09 05:55:36,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:55:36,891 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:55:36,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:55:36 WrapperNode [2024-11-09 05:55:36,891 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:55:36,893 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:55:36,893 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:55:36,893 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:55:36,902 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:55:36" (1/1) ... [2024-11-09 05:55:36,909 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:55:36" (1/1) ... [2024-11-09 05:55:36,930 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 31 [2024-11-09 05:55:36,930 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:55:36,931 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:55:36,931 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:55:36,931 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:55:36,941 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:55:36" (1/1) ... [2024-11-09 05:55:36,942 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:55:36" (1/1) ... [2024-11-09 05:55:36,943 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:55:36" (1/1) ... [2024-11-09 05:55:36,944 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:55:36" (1/1) ... [2024-11-09 05:55:36,946 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:55:36" (1/1) ... [2024-11-09 05:55:36,952 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:55:36" (1/1) ... [2024-11-09 05:55:36,956 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:55:36" (1/1) ... [2024-11-09 05:55:36,957 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:55:36" (1/1) ... [2024-11-09 05:55:36,959 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:55:36,962 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:55:36,962 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:55:36,963 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:55:36,963 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:55:36" (1/1) ... [2024-11-09 05:55:36,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:55:36,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:55:37,004 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:55:37,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:55:37,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:55:37,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:55:37,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:55:37,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:55:37,130 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:55:37,134 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:55:37,297 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-09 05:55:37,301 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:55:37,344 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:55:37,344 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:55:37,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:55:37 BoogieIcfgContainer [2024-11-09 05:55:37,345 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:55:37,348 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:55:37,350 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:55:37,354 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:55:37,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:55:36" (1/3) ... [2024-11-09 05:55:37,356 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79613792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:55:37, skipping insertion in model container [2024-11-09 05:55:37,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:55:36" (2/3) ... [2024-11-09 05:55:37,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79613792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:55:37, skipping insertion in model container [2024-11-09 05:55:37,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:55:37" (3/3) ... [2024-11-09 05:55:37,360 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k.i [2024-11-09 05:55:37,382 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:55:37,383 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:55:37,474 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:55:37,483 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;@767da438, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:55:37,483 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:55:37,488 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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 05:55:37,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 05:55:37,495 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:55:37,497 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 05:55:37,498 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:55:37,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:55:37,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1896544809, now seen corresponding path program 1 times [2024-11-09 05:55:37,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:55:37,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681009927] [2024-11-09 05:55:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:37,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:55:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:37,957 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 05:55:37,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:55:37,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681009927] [2024-11-09 05:55:37,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681009927] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:55:37,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:55:37,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 05:55:37,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142938490] [2024-11-09 05:55:37,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:55:37,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:55:37,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:55:37,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:55:37,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:55:38,002 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2024-11-09 05:55:38,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:55:38,073 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2024-11-09 05:55:38,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:55:38,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 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 [2024-11-09 05:55:38,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:55:38,093 INFO L225 Difference]: With dead ends: 20 [2024-11-09 05:55:38,093 INFO L226 Difference]: Without dead ends: 10 [2024-11-09 05:55:38,097 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:55:38,100 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:55:38,102 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:55:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-09 05:55:38,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2024-11-09 05:55:38,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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 05:55:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2024-11-09 05:55:38,137 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2024-11-09 05:55:38,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:55:38,137 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2024-11-09 05:55:38,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2024-11-09 05:55:38,138 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2024-11-09 05:55:38,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 05:55:38,139 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:55:38,139 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:55:38,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:55:38,139 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:55:38,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:55:38,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1309176782, now seen corresponding path program 1 times [2024-11-09 05:55:38,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:55:38,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750636555] [2024-11-09 05:55:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:38,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:55:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:55:38,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:55:38,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750636555] [2024-11-09 05:55:38,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750636555] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:55:38,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058906569] [2024-11-09 05:55:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:38,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:38,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:55:38,374 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:55:38,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:55:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:38,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:55:38,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:55:38,601 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:55:38,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058906569] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:55:38,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [343699232] [2024-11-09 05:55:38,718 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-09 05:55:38,718 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:55:38,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:55:38,729 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:55:38,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:55:39,232 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:55:40,071 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '109#(exists ((|v_ULTIMATE.start_main_~k~0#1_16| Int) (|v_ULTIMATE.start_main_~i~0#1_22| Int)) (and (<= |v_ULTIMATE.start_main_~k~0#1_16| 10) (<= 1 |#StackHeapBarrier|) (<= (* 1000000 |v_ULTIMATE.start_main_~k~0#1_16|) |v_ULTIMATE.start_main_~i~0#1_22|) (<= (+ |v_ULTIMATE.start_main_~i~0#1_22| 1) (* 1000001 |v_ULTIMATE.start_main_~k~0#1_16|)) (not (= |v_ULTIMATE.start_main_~i~0#1_22| (* 1000000 |v_ULTIMATE.start_main_~k~0#1_16|)))))' at error location [2024-11-09 05:55:40,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:55:40,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:55:40,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2024-11-09 05:55:40,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015972593] [2024-11-09 05:55:40,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:55:40,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 05:55:40,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:55:40,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 05:55:40,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:55:40,076 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:55:40,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:55:40,175 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2024-11-09 05:55:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:55:40,175 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-09 05:55:40,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:55:40,176 INFO L225 Difference]: With dead ends: 19 [2024-11-09 05:55:40,176 INFO L226 Difference]: Without dead ends: 15 [2024-11-09 05:55:40,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:55:40,178 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:55:40,179 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:55:40,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-09 05:55:40,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-09 05:55:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 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) [2024-11-09 05:55:40,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2024-11-09 05:55:40,183 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2024-11-09 05:55:40,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:55:40,184 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2024-11-09 05:55:40,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:55:40,184 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2024-11-09 05:55:40,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 05:55:40,185 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:55:40,185 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-11-09 05:55:40,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:55:40,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:40,386 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:55:40,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:55:40,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2154179, now seen corresponding path program 2 times [2024-11-09 05:55:40,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:55:40,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435477331] [2024-11-09 05:55:40,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:40,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:55:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:55:40,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:55:40,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435477331] [2024-11-09 05:55:40,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435477331] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:55:40,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386035772] [2024-11-09 05:55:40,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:55:40,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:40,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:55:40,573 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:55:40,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:55:40,629 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 05:55:40,630 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:55:40,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:55:40,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:55:40,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:55:40,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386035772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:55:40,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1903165977] [2024-11-09 05:55:40,903 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-09 05:55:40,903 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:55:40,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:55:40,908 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:55:40,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:55:41,098 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:55:41,832 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '256#(exists ((|v_ULTIMATE.start_main_~i~0#1_36| Int) (|v_ULTIMATE.start_main_~k~0#1_17| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (+ |v_ULTIMATE.start_main_~i~0#1_36| 1) (* 1000001 |v_ULTIMATE.start_main_~k~0#1_17|)) (<= |v_ULTIMATE.start_main_~i~0#1_36| 10000009) (not (= |v_ULTIMATE.start_main_~i~0#1_36| (* 1000000 |v_ULTIMATE.start_main_~k~0#1_17|))) (<= (* 1000000 |v_ULTIMATE.start_main_~k~0#1_17|) |v_ULTIMATE.start_main_~i~0#1_36|)))' at error location [2024-11-09 05:55:41,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:55:41,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:55:41,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-11-09 05:55:41,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532677474] [2024-11-09 05:55:41,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:55:41,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 05:55:41,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:55:41,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 05:55:41,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-11-09 05:55:41,837 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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) [2024-11-09 05:55:42,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:55:42,453 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-11-09 05:55:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:55:42,454 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 14 [2024-11-09 05:55:42,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:55:42,455 INFO L225 Difference]: With dead ends: 29 [2024-11-09 05:55:42,455 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 05:55:42,456 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=183, Invalid=628, Unknown=1, NotChecked=0, Total=812 [2024-11-09 05:55:42,457 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:55:42,458 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 12 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:55:42,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 05:55:42,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-09 05:55:42,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 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 05:55:42,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2024-11-09 05:55:42,464 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 14 [2024-11-09 05:55:42,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:55:42,465 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2024-11-09 05:55:42,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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) [2024-11-09 05:55:42,465 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2024-11-09 05:55:42,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 05:55:42,466 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:55:42,467 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2024-11-09 05:55:42,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:55:42,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:42,668 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:55:42,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:55:42,668 INFO L85 PathProgramCache]: Analyzing trace with hash 123503606, now seen corresponding path program 3 times [2024-11-09 05:55:42,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:55:42,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270001061] [2024-11-09 05:55:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:42,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:55:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:55:42,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:55:42,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270001061] [2024-11-09 05:55:42,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270001061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:55:42,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436038233] [2024-11-09 05:55:42,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:55:42,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:42,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:55:42,966 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:55:42,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:55:43,021 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:55:43,021 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:55:43,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:55:43,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:55:43,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:55:43,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436038233] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:55:43,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1730305176] [2024-11-09 05:55:43,641 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-09 05:55:43,641 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:55:43,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:55:43,641 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:55:43,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:55:43,803 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:55:44,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '516#(exists ((|v_ULTIMATE.start_main_~k~0#1_18| Int) (|v_ULTIMATE.start_main_~i~0#1_60| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (+ |v_ULTIMATE.start_main_~i~0#1_60| 1) (* 1000001 |v_ULTIMATE.start_main_~k~0#1_18|)) (<= (* 1000000 |v_ULTIMATE.start_main_~k~0#1_18|) |v_ULTIMATE.start_main_~i~0#1_60|) (<= |v_ULTIMATE.start_main_~i~0#1_60| 10000009) (not (= |v_ULTIMATE.start_main_~i~0#1_60| (* 1000000 |v_ULTIMATE.start_main_~k~0#1_18|)))))' at error location [2024-11-09 05:55:44,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:55:44,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:55:44,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2024-11-09 05:55:44,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678677849] [2024-11-09 05:55:44,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:55:44,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 05:55:44,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:55:44,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 05:55:44,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2024-11-09 05:55:44,619 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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 05:55:45,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:55:45,234 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2024-11-09 05:55:45,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 05:55:45,235 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-09 05:55:45,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:55:45,236 INFO L225 Difference]: With dead ends: 49 [2024-11-09 05:55:45,236 INFO L226 Difference]: Without dead ends: 45 [2024-11-09 05:55:45,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=644, Invalid=1806, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 05:55:45,238 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:55:45,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 12 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:55:45,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-09 05:55:45,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-09 05:55:45,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 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 05:55:45,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2024-11-09 05:55:45,248 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 24 [2024-11-09 05:55:45,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:55:45,249 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2024-11-09 05:55:45,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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 05:55:45,249 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2024-11-09 05:55:45,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 05:55:45,250 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:55:45,250 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2024-11-09 05:55:45,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 05:55:45,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:45,455 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:55:45,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:55:45,456 INFO L85 PathProgramCache]: Analyzing trace with hash -875667544, now seen corresponding path program 4 times [2024-11-09 05:55:45,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:55:45,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94928111] [2024-11-09 05:55:45,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:45,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:55:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:55:46,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:55:46,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94928111] [2024-11-09 05:55:46,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94928111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:55:46,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784820403] [2024-11-09 05:55:46,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:55:46,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:46,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:55:46,185 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:55:46,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:55:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:46,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 05:55:46,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:55:46,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:55:47,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784820403] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:55:47,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [934580231] [2024-11-09 05:55:47,545 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-09 05:55:47,545 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:55:47,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:55:47,546 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:55:47,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:55:47,700 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:55:48,474 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '996#(exists ((|v_ULTIMATE.start_main_~k~0#1_19| Int) (|v_ULTIMATE.start_main_~i~0#1_104| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (* 1000000 |v_ULTIMATE.start_main_~k~0#1_19|) |v_ULTIMATE.start_main_~i~0#1_104|) (not (= (* 1000000 |v_ULTIMATE.start_main_~k~0#1_19|) |v_ULTIMATE.start_main_~i~0#1_104|)) (<= |v_ULTIMATE.start_main_~k~0#1_19| 10) (<= (+ |v_ULTIMATE.start_main_~i~0#1_104| 1) (* 1000001 |v_ULTIMATE.start_main_~k~0#1_19|))))' at error location [2024-11-09 05:55:48,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:55:48,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:55:48,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2024-11-09 05:55:48,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184708619] [2024-11-09 05:55:48,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:55:48,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-09 05:55:48,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:55:48,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-09 05:55:48,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=1964, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 05:55:48,478 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 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 05:55:50,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:55:50,423 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2024-11-09 05:55:50,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-09 05:55:50,424 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 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 44 [2024-11-09 05:55:50,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:55:50,426 INFO L225 Difference]: With dead ends: 89 [2024-11-09 05:55:50,426 INFO L226 Difference]: Without dead ends: 85 [2024-11-09 05:55:50,430 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2359, Invalid=5651, Unknown=0, NotChecked=0, Total=8010 [2024-11-09 05:55:50,431 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:55:50,431 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 16 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:55:50,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-09 05:55:50,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-11-09 05:55:50,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 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 05:55:50,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2024-11-09 05:55:50,445 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 44 [2024-11-09 05:55:50,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:55:50,446 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2024-11-09 05:55:50,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 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 05:55:50,446 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2024-11-09 05:55:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-09 05:55:50,448 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:55:50,448 INFO L215 NwaCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2024-11-09 05:55:50,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:55:50,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:50,653 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:55:50,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:55:50,653 INFO L85 PathProgramCache]: Analyzing trace with hash 364392460, now seen corresponding path program 5 times [2024-11-09 05:55:50,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:55:50,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606702434] [2024-11-09 05:55:50,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:50,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:55:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:55:52,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:55:52,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606702434] [2024-11-09 05:55:52,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606702434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:55:52,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608182647] [2024-11-09 05:55:52,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:55:52,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:52,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:55:52,630 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:55:52,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:55:52,732 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2024-11-09 05:55:52,732 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:55:52,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 05:55:52,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:55:53,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:55:56,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608182647] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:55:56,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [178296957] [2024-11-09 05:55:56,750 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-09 05:55:56,751 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:55:56,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:55:56,751 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:55:56,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:55:56,900 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:55:57,989 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1915#(exists ((|v_ULTIMATE.start_main_~i~0#1_188| Int) (|v_ULTIMATE.start_main_~k~0#1_20| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (+ |v_ULTIMATE.start_main_~i~0#1_188| 1) (* 1000001 |v_ULTIMATE.start_main_~k~0#1_20|)) (<= |v_ULTIMATE.start_main_~k~0#1_20| 10) (not (= (* 1000000 |v_ULTIMATE.start_main_~k~0#1_20|) |v_ULTIMATE.start_main_~i~0#1_188|)) (<= (* 1000000 |v_ULTIMATE.start_main_~k~0#1_20|) |v_ULTIMATE.start_main_~i~0#1_188|)))' at error location [2024-11-09 05:55:57,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:55:57,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:55:57,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 85 [2024-11-09 05:55:57,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981237008] [2024-11-09 05:55:57,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:55:57,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-09 05:55:57,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:55:57,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-09 05:55:57,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2494, Invalid=5696, Unknown=0, NotChecked=0, Total=8190 [2024-11-09 05:55:57,997 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 85 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) [2024-11-09 05:56:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:56:06,217 INFO L93 Difference]: Finished difference Result 169 states and 208 transitions. [2024-11-09 05:56:06,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-11-09 05:56:06,219 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 85 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) Word has length 84 [2024-11-09 05:56:06,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:56:06,223 INFO L225 Difference]: With dead ends: 169 [2024-11-09 05:56:06,223 INFO L226 Difference]: Without dead ends: 165 [2024-11-09 05:56:06,234 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 203 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6210 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=8968, Invalid=19424, Unknown=0, NotChecked=0, Total=28392 [2024-11-09 05:56:06,235 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 115 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:56:06,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 16 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:56:06,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-09 05:56:06,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2024-11-09 05:56:06,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0060975609756098) internal successors, (165), 164 states have internal predecessors, (165), 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 05:56:06,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2024-11-09 05:56:06,261 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 84 [2024-11-09 05:56:06,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:56:06,262 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2024-11-09 05:56:06,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 85 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) [2024-11-09 05:56:06,262 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2024-11-09 05:56:06,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-11-09 05:56:06,267 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:56:06,268 INFO L215 NwaCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1] [2024-11-09 05:56:06,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 05:56:06,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:06,469 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:56:06,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:56:06,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1766995156, now seen corresponding path program 6 times [2024-11-09 05:56:06,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:56:06,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558184013] [2024-11-09 05:56:06,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:06,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:56:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:56:12,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:56:12,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558184013] [2024-11-09 05:56:12,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558184013] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:56:12,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222024302] [2024-11-09 05:56:12,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:56:12,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:12,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:56:12,631 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:56:12,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:56:13,155 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:56:13,155 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:56:13,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-09 05:56:13,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:56:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:56:14,113 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:56:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:56:25,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222024302] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:56:25,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [251115308] [2024-11-09 05:56:25,195 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-09 05:56:25,195 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:56:25,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:56:25,195 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:56:25,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:56:25,323 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:56:26,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3715#(exists ((|v_ULTIMATE.start_main_~i~0#1_352| Int) (|v_ULTIMATE.start_main_~k~0#1_21| Int)) (and (<= |v_ULTIMATE.start_main_~i~0#1_352| 10000009) (not (= |v_ULTIMATE.start_main_~i~0#1_352| (* 1000000 |v_ULTIMATE.start_main_~k~0#1_21|))) (<= 1 |#StackHeapBarrier|) (<= (+ |v_ULTIMATE.start_main_~i~0#1_352| 1) (* 1000001 |v_ULTIMATE.start_main_~k~0#1_21|)) (<= (* 1000000 |v_ULTIMATE.start_main_~k~0#1_21|) |v_ULTIMATE.start_main_~i~0#1_352|)))' at error location [2024-11-09 05:56:26,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:56:26,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:56:26,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 166 [2024-11-09 05:56:26,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731824307] [2024-11-09 05:56:26,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:56:26,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2024-11-09 05:56:26,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:56:26,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2024-11-09 05:56:26,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9838, Invalid=19574, Unknown=0, NotChecked=0, Total=29412 [2024-11-09 05:56:26,960 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand has 166 states, 166 states have (on average 1.9879518072289157) internal successors, (330), 166 states have internal predecessors, (330), 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 05:57:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:57:07,941 INFO L93 Difference]: Finished difference Result 329 states and 408 transitions. [2024-11-09 05:57:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2024-11-09 05:57:07,942 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 1.9879518072289157) internal successors, (330), 166 states have internal predecessors, (330), 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 164 [2024-11-09 05:57:07,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:57:07,944 INFO L225 Difference]: With dead ends: 329 [2024-11-09 05:57:07,944 INFO L226 Difference]: Without dead ends: 325 [2024-11-09 05:57:07,955 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 401 SyntacticMatches, 2 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23881 ImplicationChecksByTransitivity, 55.9s TimeCoverageRelationStatistics Valid=35749, Invalid=72821, Unknown=0, NotChecked=0, Total=108570 [2024-11-09 05:57:07,956 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 236 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:57:07,956 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 24 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:57:07,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-11-09 05:57:07,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2024-11-09 05:57:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.0030864197530864) internal successors, (325), 324 states have internal predecessors, (325), 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 05:57:07,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 325 transitions. [2024-11-09 05:57:07,998 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 325 transitions. Word has length 164 [2024-11-09 05:57:07,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:57:07,999 INFO L471 AbstractCegarLoop]: Abstraction has 325 states and 325 transitions. [2024-11-09 05:57:07,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 1.9879518072289157) internal successors, (330), 166 states have internal predecessors, (330), 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 05:57:07,999 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 325 transitions. [2024-11-09 05:57:08,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2024-11-09 05:57:08,006 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:08,007 INFO L215 NwaCegarLoop]: trace histogram [159, 159, 1, 1, 1, 1, 1, 1] [2024-11-09 05:57:08,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 05:57:08,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 05:57:08,208 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:08,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:08,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1827680668, now seen corresponding path program 7 times [2024-11-09 05:57:08,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:57:08,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255330126] [2024-11-09 05:57:08,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:08,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:57:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:57:27,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:57:27,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255330126] [2024-11-09 05:57:27,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255330126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:27,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333575167] [2024-11-09 05:57:27,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:57:27,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:27,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:57:27,937 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:57:27,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:57:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:32,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 162 conjuncts are in the unsatisfiable core [2024-11-09 05:57:32,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:57:34,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:58:19,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333575167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:58:19,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1996661674] [2024-11-09 05:58:19,812 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-09 05:58:19,812 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:58:19,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:58:19,813 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:58:19,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:58:19,961 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:58:22,844 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7275#(exists ((|v_ULTIMATE.start_main_~i~0#1_676| Int) (|v_ULTIMATE.start_main_~k~0#1_22| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (+ |v_ULTIMATE.start_main_~i~0#1_676| 1) (* 1000001 |v_ULTIMATE.start_main_~k~0#1_22|)) (not (= |v_ULTIMATE.start_main_~i~0#1_676| (* 1000000 |v_ULTIMATE.start_main_~k~0#1_22|))) (<= (* 1000000 |v_ULTIMATE.start_main_~k~0#1_22|) |v_ULTIMATE.start_main_~i~0#1_676|) (<= |v_ULTIMATE.start_main_~k~0#1_22| 10)))' at error location [2024-11-09 05:58:22,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:58:22,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:58:22,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [163, 163, 163] total 326 [2024-11-09 05:58:22,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214809527] [2024-11-09 05:58:22,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:58:22,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 326 states [2024-11-09 05:58:22,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:22,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 326 interpolants. [2024-11-09 05:58:22,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38838, Invalid=71054, Unknown=0, NotChecked=0, Total=109892 [2024-11-09 05:58:22,884 INFO L87 Difference]: Start difference. First operand 325 states and 325 transitions. Second operand has 326 states, 326 states have (on average 1.9938650306748467) internal successors, (650), 326 states have internal predecessors, (650), 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 06:02:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:02:43,306 INFO L93 Difference]: Finished difference Result 649 states and 808 transitions. [2024-11-09 06:02:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 323 states. [2024-11-09 06:02:43,307 INFO L78 Accepts]: Start accepts. Automaton has has 326 states, 326 states have (on average 1.9938650306748467) internal successors, (650), 326 states have internal predecessors, (650), 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 324 [2024-11-09 06:02:43,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:02:43,312 INFO L225 Difference]: With dead ends: 649 [2024-11-09 06:02:43,312 INFO L226 Difference]: Without dead ends: 645 [2024-11-09 06:02:43,335 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1451 GetRequests, 801 SyntacticMatches, 2 SemanticMatches, 648 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92561 ImplicationChecksByTransitivity, 315.6s TimeCoverageRelationStatistics Valid=141869, Invalid=279981, Unknown=0, NotChecked=0, Total=421850 [2024-11-09 06:02:43,335 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 475 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:02:43,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 20 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 06:02:43,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2024-11-09 06:02:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2024-11-09 06:02:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.0015527950310559) internal successors, (645), 644 states have internal predecessors, (645), 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 06:02:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 645 transitions. [2024-11-09 06:02:43,395 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 645 transitions. Word has length 324 [2024-11-09 06:02:43,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:02:43,396 INFO L471 AbstractCegarLoop]: Abstraction has 645 states and 645 transitions. [2024-11-09 06:02:43,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 326 states, 326 states have (on average 1.9938650306748467) internal successors, (650), 326 states have internal predecessors, (650), 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 06:02:43,397 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 645 transitions. [2024-11-09 06:02:43,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2024-11-09 06:02:43,417 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:02:43,418 INFO L215 NwaCegarLoop]: trace histogram [319, 319, 1, 1, 1, 1, 1, 1] [2024-11-09 06:02:43,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 06:02:43,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:02:43,619 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:02:43,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:02:43,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1815167364, now seen corresponding path program 8 times [2024-11-09 06:02:43,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:02:43,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470432360] [2024-11-09 06:02:43,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:43,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:02:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 101761 backedges. 0 proven. 101761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:04:06,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:06,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470432360] [2024-11-09 06:04:06,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470432360] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:04:06,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201689766] [2024-11-09 06:04:06,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:04:06,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:06,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:04:06,977 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:04:06,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3449900-c9fe-4fb0-a5bd-421c5b5ccdfa/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:04:08,237 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 320 check-sat command(s) [2024-11-09 06:04:08,237 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:04:08,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 322 conjuncts are in the unsatisfiable core [2024-11-09 06:04:08,288 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:04:10,785 INFO L134 CoverageAnalysis]: Checked inductivity of 101761 backedges. 0 proven. 101761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:04:10,785 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:07:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 101761 backedges. 0 proven. 101761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:04,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201689766] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:07:04,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [255435021] [2024-11-09 06:07:04,898 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-09 06:07:04,898 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:07:04,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:07:04,898 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:07:04,898 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:07:04,991 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:07:09,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14354#(exists ((|v_ULTIMATE.start_main_~k~0#1_23| Int) (|v_ULTIMATE.start_main_~i~0#1_1320| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~k~0#1_23| 10) (<= (* 1000000 |v_ULTIMATE.start_main_~k~0#1_23|) |v_ULTIMATE.start_main_~i~0#1_1320|) (<= (+ |v_ULTIMATE.start_main_~i~0#1_1320| 1) (* 1000001 |v_ULTIMATE.start_main_~k~0#1_23|)) (not (= (* 1000000 |v_ULTIMATE.start_main_~k~0#1_23|) |v_ULTIMATE.start_main_~i~0#1_1320|))))' at error location [2024-11-09 06:07:09,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:07:09,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:07:09,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [323, 322, 322] total 645 [2024-11-09 06:07:09,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123389571] [2024-11-09 06:07:09,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:07:09,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 645 states [2024-11-09 06:07:09,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:07:09,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 645 interpolants. [2024-11-09 06:07:09,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154114, Invalid=269036, Unknown=0, NotChecked=0, Total=423150 [2024-11-09 06:07:09,968 INFO L87 Difference]: Start difference. First operand 645 states and 645 transitions. Second operand has 645 states, 645 states have (on average 2.0015503875968994) internal successors, (1291), 645 states have internal predecessors, (1291), 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 06:07:19,682 WARN L286 SmtUtils]: Spent 9.09s on a formula simplification. DAG size of input: 963 DAG size of output: 9 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:07:28,737 WARN L286 SmtUtils]: Spent 8.87s on a formula simplification. DAG size of input: 962 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:07:37,722 WARN L286 SmtUtils]: Spent 8.79s on a formula simplification. DAG size of input: 959 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:07:47,098 WARN L286 SmtUtils]: Spent 9.16s on a formula simplification. DAG size of input: 956 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:07:56,615 WARN L286 SmtUtils]: Spent 9.29s on a formula simplification. DAG size of input: 953 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:08:05,608 WARN L286 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 950 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:08:14,403 WARN L286 SmtUtils]: Spent 8.52s on a formula simplification. DAG size of input: 947 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:08:23,596 WARN L286 SmtUtils]: Spent 8.91s on a formula simplification. DAG size of input: 944 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:08:32,985 WARN L286 SmtUtils]: Spent 8.96s on a formula simplification. DAG size of input: 941 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:08:42,397 WARN L286 SmtUtils]: Spent 9.03s on a formula simplification. DAG size of input: 938 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:08:51,624 WARN L286 SmtUtils]: Spent 8.72s on a formula simplification. DAG size of input: 935 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:09:01,732 WARN L286 SmtUtils]: Spent 9.68s on a formula simplification. DAG size of input: 932 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:09:11,822 WARN L286 SmtUtils]: Spent 9.59s on a formula simplification. DAG size of input: 929 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:09:20,911 WARN L286 SmtUtils]: Spent 8.62s on a formula simplification. DAG size of input: 926 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)