./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p01.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/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_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p01.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/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 64bit --witnessprinter.graph.data.programhash 10c341169e851beaa907d6b4c856b8c9335bdf02c819f534595f4ceb4010e354 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:55:25,359 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:55:25,459 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-64bit-Taipan_Default.epf [2024-11-09 04:55:25,466 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:55:25,466 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:55:25,505 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:55:25,506 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:55:25,506 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:55:25,507 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:55:25,508 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:55:25,508 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:55:25,508 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:55:25,509 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:55:25,509 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:55:25,510 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:55:25,510 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:55:25,511 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:55:25,511 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:55:25,511 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:55:25,512 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:55:25,512 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:55:25,513 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:55:25,514 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:55:25,514 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 04:55:25,515 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:55:25,515 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:55:25,515 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 04:55:25,516 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:55:25,516 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 04:55:25,517 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:55:25,517 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 04:55:25,517 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:55:25,518 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:55:25,518 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:55:25,519 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:55:25,519 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:55:25,519 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:55:25,520 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:55:25,520 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 04:55:25,521 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:55:25,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:55:25,521 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:55:25,522 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:55:25,522 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:55:25,522 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_4ae1a826-5153-41de-bd4e-96fb8aa411a2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10c341169e851beaa907d6b4c856b8c9335bdf02c819f534595f4ceb4010e354 [2024-11-09 04:55:25,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:55:25,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:55:25,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:55:25,810 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:55:25,811 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:55:25,812 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p01.c Unable to find full path for "g++" [2024-11-09 04:55:27,804 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:55:28,084 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:55:28,084 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p01.c [2024-11-09 04:55:28,103 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/data/9929683b2/cd014c7be52c45e0ac27a3de6ae74003/FLAG98fddfb9b [2024-11-09 04:55:28,382 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/data/9929683b2/cd014c7be52c45e0ac27a3de6ae74003 [2024-11-09 04:55:28,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:55:28,386 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:55:28,387 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:55:28,387 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:55:28,395 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:55:28,397 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:55:28" (1/1) ... [2024-11-09 04:55:28,400 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ebe840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:55:28, skipping insertion in model container [2024-11-09 04:55:28,400 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:55:28" (1/1) ... [2024-11-09 04:55:28,448 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:55:28,622 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_4ae1a826-5153-41de-bd4e-96fb8aa411a2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p01.c[1266,1279] [2024-11-09 04:55:28,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:55:28,786 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:55:28,795 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_4ae1a826-5153-41de-bd4e-96fb8aa411a2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p01.c[1266,1279] [2024-11-09 04:55:28,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:55:28,915 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:55:28,918 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:55:28 WrapperNode [2024-11-09 04:55:28,918 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:55:28,919 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:55:28,920 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:55:28,922 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:55:28,929 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:55:28" (1/1) ... [2024-11-09 04:55:28,947 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:55:28" (1/1) ... [2024-11-09 04:55:29,028 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 749 [2024-11-09 04:55:29,029 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:55:29,029 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:55:29,029 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:55:29,030 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:55:29,039 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:55:28" (1/1) ... [2024-11-09 04:55:29,047 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:55:28" (1/1) ... [2024-11-09 04:55:29,073 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:55:28" (1/1) ... [2024-11-09 04:55:29,073 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:55:28" (1/1) ... [2024-11-09 04:55:29,162 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:55:28" (1/1) ... [2024-11-09 04:55:29,178 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:55:28" (1/1) ... [2024-11-09 04:55:29,186 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:55:28" (1/1) ... [2024-11-09 04:55:29,200 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:55:28" (1/1) ... [2024-11-09 04:55:29,223 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:55:29,224 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:55:29,224 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:55:29,225 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:55:29,225 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:55:28" (1/1) ... [2024-11-09 04:55:29,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:55:29,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:55:29,295 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:55:29,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:55:29,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:55:29,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 04:55:29,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:55:29,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:55:29,515 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:55:29,517 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:55:30,573 INFO L? ?]: Removed 395 outVars from TransFormulas that were not future-live. [2024-11-09 04:55:30,573 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:55:31,353 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:55:31,354 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 04:55:31,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:55:31 BoogieIcfgContainer [2024-11-09 04:55:31,354 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:55:31,358 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:55:31,358 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:55:31,361 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:55:31,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:55:28" (1/3) ... [2024-11-09 04:55:31,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc52f38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:55:31, skipping insertion in model container [2024-11-09 04:55:31,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:55:28" (2/3) ... [2024-11-09 04:55:31,365 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc52f38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:55:31, skipping insertion in model container [2024-11-09 04:55:31,365 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:55:31" (3/3) ... [2024-11-09 04:55:31,367 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p01.c [2024-11-09 04:55:31,391 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:55:31,391 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 04:55:31,463 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:55:31,469 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;@7bffb8cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:55:31,469 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 04:55:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:55:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 04:55:31,480 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:55:31,481 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 04:55:31,482 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:55:31,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:55:31,487 INFO L85 PathProgramCache]: Analyzing trace with hash 20813556, now seen corresponding path program 1 times [2024-11-09 04:55:31,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:55:31,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475805362] [2024-11-09 04:55:31,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:31,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:55:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:33,690 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 04:55:33,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:55:33,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475805362] [2024-11-09 04:55:33,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475805362] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:55:33,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:55:33,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:55:33,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552094249] [2024-11-09 04:55:33,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:55:33,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:55:33,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:55:33,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:55:33,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:55:33,736 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 04:55:33,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:55:33,881 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2024-11-09 04:55:33,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:55:33,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2024-11-09 04:55:33,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:55:33,892 INFO L225 Difference]: With dead ends: 15 [2024-11-09 04:55:33,892 INFO L226 Difference]: Without dead ends: 9 [2024-11-09 04:55:33,895 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:55:33,901 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:55:33,902 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:55:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-11-09 04:55:33,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2024-11-09 04:55:33,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:55:33,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2024-11-09 04:55:33,929 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2024-11-09 04:55:33,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:55:33,929 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2024-11-09 04:55:33,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 04:55:33,930 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2024-11-09 04:55:33,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 04:55:33,930 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:55:33,930 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-09 04:55:33,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:55:33,931 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:55:33,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:55:33,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1598773554, now seen corresponding path program 1 times [2024-11-09 04:55:33,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:55:33,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507766367] [2024-11-09 04:55:33,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:33,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:55:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:55:39,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:55:39,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507766367] [2024-11-09 04:55:39,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507766367] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:55:39,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427785466] [2024-11-09 04:55:39,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:39,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:55:39,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:55:39,296 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:55:39,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:55:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:40,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-09 04:55:40,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:55:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:55:41,133 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:55:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:55:54,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427785466] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:55:54,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1635771464] [2024-11-09 04:55:54,857 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-09 04:55:54,857 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:55:54,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:55:54,867 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:55:54,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:55:55,260 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2024-11-09 04:55:55,434 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8192 conjunctions. This might take some time... [2024-11-09 04:56:07,664 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 8192 conjunctions. [2024-11-09 04:56:08,034 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2024-11-09 04:56:08,214 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8192 conjunctions. This might take some time... [2024-11-09 04:56:20,762 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 8192 conjunctions. [2024-11-09 04:56:27,667 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:56:27,669 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '46#true' at error location [2024-11-09 04:56:27,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:56:27,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:56:27,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 12 [2024-11-09 04:56:27,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215417707] [2024-11-09 04:56:27,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:56:27,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 04:56:27,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:56:27,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 04:56:27,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2024-11-09 04:56:27,674 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) 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 04:56:28,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:28,676 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2024-11-09 04:56:28,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:56:28,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) 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 7 [2024-11-09 04:56:28,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:28,679 INFO L225 Difference]: With dead ends: 14 [2024-11-09 04:56:28,679 INFO L226 Difference]: Without dead ends: 12 [2024-11-09 04:56:28,679 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2024-11-09 04:56:28,682 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:28,683 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 16 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 04:56:28,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-09 04:56:28,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2024-11-09 04:56:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 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 04:56:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2024-11-09 04:56:28,690 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2024-11-09 04:56:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:28,690 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2024-11-09 04:56:28,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) 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 04:56:28,691 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2024-11-09 04:56:28,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 04:56:28,692 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:28,692 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2024-11-09 04:56:28,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 04:56:28,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:28,893 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:56:28,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:28,894 INFO L85 PathProgramCache]: Analyzing trace with hash -2106948044, now seen corresponding path program 2 times [2024-11-09 04:56:28,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:56:28,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521232430] [2024-11-09 04:56:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:28,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:56:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:40,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:56:40,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521232430] [2024-11-09 04:56:40,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521232430] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:56:40,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073703063] [2024-11-09 04:56:40,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:56:40,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:40,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:56:40,867 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:56:40,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:56:42,933 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 04:56:42,933 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:56:42,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-09 04:56:42,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:43,631 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:57:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:57:28,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073703063] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:57:28,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [354642643] [2024-11-09 04:57:28,276 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-09 04:57:28,276 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:57:28,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:57:28,277 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:57:28,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:57:28,491 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2024-11-09 04:57:28,572 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8192 conjunctions. This might take some time... [2024-11-09 04:57:43,467 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 8192 conjunctions. [2024-11-09 04:57:43,707 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2024-11-09 04:57:43,809 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8192 conjunctions. This might take some time... [2024-11-09 04:57:59,918 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 8192 conjunctions. [2024-11-09 04:58:07,098 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:58:07,098 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '128#true' at error location [2024-11-09 04:58:07,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:58:07,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:58:07,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 7] total 15 [2024-11-09 04:58:07,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541184058] [2024-11-09 04:58:07,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:58:07,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 04:58:07,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:58:07,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 04:58:07,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2024-11-09 04:58:07,101 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 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 04:58:07,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:58:07,634 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2024-11-09 04:58:07,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 04:58:07,635 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 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 10 [2024-11-09 04:58:07,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:58:07,635 INFO L225 Difference]: With dead ends: 17 [2024-11-09 04:58:07,635 INFO L226 Difference]: Without dead ends: 15 [2024-11-09 04:58:07,636 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2024-11-09 04:58:07,637 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:58:07,637 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 19 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:58:07,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-09 04:58:07,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2024-11-09 04:58:07,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:58:07,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2024-11-09 04:58:07,641 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2024-11-09 04:58:07,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:58:07,641 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2024-11-09 04:58:07,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 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 04:58:07,642 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2024-11-09 04:58:07,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 04:58:07,642 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:58:07,642 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1] [2024-11-09 04:58:07,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 04:58:07,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:58:07,843 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:58:07,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:58:07,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1419697678, now seen corresponding path program 3 times [2024-11-09 04:58:07,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:58:07,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462871325] [2024-11-09 04:58:07,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:58:07,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:58:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:58:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:58:24,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:58:24,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462871325] [2024-11-09 04:58:24,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462871325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:58:24,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535892950] [2024-11-09 04:58:24,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:58:24,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:58:24,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:58:24,545 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:58:24,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:58:38,805 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:58:38,805 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:58:38,815 WARN L253 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-09 04:58:38,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:58:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:58:39,884 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:00:09,075 WARN L286 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 213 DAG size of output: 114 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:02:25,331 WARN L286 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 165 DAG size of output: 130 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 05:02:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:02:41,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535892950] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:02:41,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [369970427] [2024-11-09 05:02:41,107 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-09 05:02:41,107 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:02:41,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:02:41,108 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:02:41,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:02:41,302 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2024-11-09 05:02:41,418 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8192 conjunctions. This might take some time... [2024-11-09 05:02:55,039 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 8192 conjunctions. [2024-11-09 05:02:55,204 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2024-11-09 05:02:55,334 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8192 conjunctions. This might take some time... [2024-11-09 05:03:10,636 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 8192 conjunctions. [2024-11-09 05:03:16,998 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:03:16,998 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '243#true' at error location [2024-11-09 05:03:16,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:03:16,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:03:16,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 10] total 22 [2024-11-09 05:03:16,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323689933] [2024-11-09 05:03:16,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:03:16,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 05:03:16,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:17,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 05:03:17,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:03:17,001 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 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 05:03:19,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:19,376 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2024-11-09 05:03:19,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:03:19,379 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 05:03:19,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:19,384 INFO L225 Difference]: With dead ends: 26 [2024-11-09 05:03:19,384 INFO L226 Difference]: Without dead ends: 24 [2024-11-09 05:03:19,385 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=288, Invalid=642, Unknown=0, NotChecked=0, Total=930 [2024-11-09 05:03:19,386 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:19,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 19 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-09 05:03:19,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-09 05:03:19,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2024-11-09 05:03:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2024-11-09 05:03:19,405 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 13 [2024-11-09 05:03:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:19,405 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2024-11-09 05:03:19,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 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 05:03:19,406 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2024-11-09 05:03:19,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 05:03:19,406 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:19,406 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1] [2024-11-09 05:03:19,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:03:19,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:19,610 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:03:19,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:19,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1334373196, now seen corresponding path program 4 times [2024-11-09 05:03:19,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:19,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023247169] [2024-11-09 05:03:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:19,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:04:31,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:31,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023247169] [2024-11-09 05:04:31,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023247169] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:31,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978914562] [2024-11-09 05:04:31,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:04:31,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:31,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:31,009 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:31,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ae1a826-5153-41de-bd4e-96fb8aa411a2/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:05:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:05:16,353 WARN L253 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 131 conjuncts are in the unsatisfiable core [2024-11-09 05:05:16,381 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:05:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:05:18,859 INFO L311 TraceCheckSpWp]: Computing backward predicates...