./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/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_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/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_60da9637-87e9-47d0-8565-115d8bc035a5/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 2467b918f90fe26ead39772ec36304202be3f16a6c04dfdd5844d39d05599b5a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:29:25,222 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:29:25,326 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 04:29:25,334 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:29:25,336 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:29:25,380 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:29:25,381 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:29:25,381 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:29:25,382 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:29:25,385 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:29:25,385 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:29:25,386 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:29:25,386 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:29:25,389 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:29:25,389 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:29:25,390 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:29:25,390 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:29:25,390 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:29:25,391 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:29:25,391 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:29:25,392 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:29:25,400 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:29:25,401 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:29:25,401 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 04:29:25,402 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:29:25,402 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:29:25,402 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:29:25,402 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:29:25,403 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 04:29:25,403 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:29:25,403 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 04:29:25,403 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:29:25,404 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:29:25,405 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 04:29:25,409 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:29:25,410 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:29:25,410 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:29:25,410 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:29:25,411 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:29:25,411 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:29:25,411 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:29:25,412 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 04:29:25,412 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:29:25,412 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:29:25,413 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:29:25,413 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:29:25,414 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:29:25,414 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_60da9637-87e9-47d0-8565-115d8bc035a5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2467b918f90fe26ead39772ec36304202be3f16a6c04dfdd5844d39d05599b5a [2024-11-09 04:29:25,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:29:25,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:29:25,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:29:25,809 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:29:25,810 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:29:25,812 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c Unable to find full path for "g++" [2024-11-09 04:29:28,111 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:29:28,294 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:29:28,295 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2024-11-09 04:29:28,304 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/data/67da30dce/9381bde1aee0431aa0d81060053140c4/FLAG5bb95ba66 [2024-11-09 04:29:28,318 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/data/67da30dce/9381bde1aee0431aa0d81060053140c4 [2024-11-09 04:29:28,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:29:28,322 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:29:28,323 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:29:28,323 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:29:28,329 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:29:28,330 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,331 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e797cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28, skipping insertion in model container [2024-11-09 04:29:28,331 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,356 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:29:28,544 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_60da9637-87e9-47d0-8565-115d8bc035a5/sv-benchmarks/c/recursive-simple/sum_20x0-2.c[481,494] [2024-11-09 04:29:28,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:29:28,559 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:29:28,572 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_60da9637-87e9-47d0-8565-115d8bc035a5/sv-benchmarks/c/recursive-simple/sum_20x0-2.c[481,494] [2024-11-09 04:29:28,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:29:28,591 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:29:28,591 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28 WrapperNode [2024-11-09 04:29:28,591 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:29:28,592 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:29:28,592 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:29:28,592 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:29:28,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,607 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,623 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2024-11-09 04:29:28,623 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:29:28,624 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:29:28,624 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:29:28,624 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:29:28,632 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,633 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,634 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,634 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,636 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,637 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,638 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,639 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,640 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:29:28,641 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:29:28,641 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:29:28,642 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:29:28,643 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:29:28,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:28,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:29:28,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:29:28,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:29:28,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:29:28,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:29:28,717 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2024-11-09 04:29:28,717 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2024-11-09 04:29:28,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 04:29:28,794 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:29:28,798 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:29:28,946 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-09 04:29:28,946 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:29:28,982 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:29:28,982 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 04:29:28,983 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:29:28 BoogieIcfgContainer [2024-11-09 04:29:28,983 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:29:28,987 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:29:28,988 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:29:28,991 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:29:28,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:29:28" (1/3) ... [2024-11-09 04:29:28,993 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4abdb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:29:28, skipping insertion in model container [2024-11-09 04:29:28,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (2/3) ... [2024-11-09 04:29:28,995 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4abdb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:29:28, skipping insertion in model container [2024-11-09 04:29:28,995 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:29:28" (3/3) ... [2024-11-09 04:29:28,997 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2024-11-09 04:29:29,018 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:29:29,018 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 04:29:29,093 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:29:29,101 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;@6dab4b4c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:29:29,101 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 04:29:29,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:29:29,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 04:29:29,114 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:29,115 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:29,115 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:29,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:29,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1493244868, now seen corresponding path program 1 times [2024-11-09 04:29:29,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:29,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972071589] [2024-11-09 04:29:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:29,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:29,459 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 04:29:29,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:29,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972071589] [2024-11-09 04:29:29,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972071589] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:29,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:29,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:29:29,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836702991] [2024-11-09 04:29:29,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:29,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:29:29,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:29,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:29:29,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:29:29,495 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 04:29:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:29,592 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2024-11-09 04:29:29,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:29:29,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2024-11-09 04:29:29,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:29,606 INFO L225 Difference]: With dead ends: 22 [2024-11-09 04:29:29,606 INFO L226 Difference]: Without dead ends: 14 [2024-11-09 04:29:29,610 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:29:29,613 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:29,615 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:29,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-09 04:29:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-09 04:29:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:29:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-11-09 04:29:29,657 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2024-11-09 04:29:29,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:29,657 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-11-09 04:29:29,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 04:29:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-11-09 04:29:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 04:29:29,659 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:29,660 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:29,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:29:29,660 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:29,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:29,661 INFO L85 PathProgramCache]: Analyzing trace with hash -642736818, now seen corresponding path program 1 times [2024-11-09 04:29:29,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:29,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408958738] [2024-11-09 04:29:29,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:29,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:29:29,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:29,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408958738] [2024-11-09 04:29:29,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408958738] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:29,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632606671] [2024-11-09 04:29:29,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:29,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:29,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:29,833 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:29,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:29:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:29,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:29:29,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:29:30,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:29:30,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632606671] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:30,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [86185467] [2024-11-09 04:29:30,338 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:29:30,338 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:30,345 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:29:30,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:30,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2024-11-09 04:29:30,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853712618] [2024-11-09 04:29:30,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:30,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 04:29:30,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:30,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 04:29:30,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:29:30,357 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 04:29:30,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:30,450 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2024-11-09 04:29:30,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:29:30,451 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 15 [2024-11-09 04:29:30,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:30,452 INFO L225 Difference]: With dead ends: 21 [2024-11-09 04:29:30,452 INFO L226 Difference]: Without dead ends: 17 [2024-11-09 04:29:30,452 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-09 04:29:30,454 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:30,455 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 25 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:30,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-09 04:29:30,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-09 04:29:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:29:30,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-11-09 04:29:30,466 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2024-11-09 04:29:30,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:30,466 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-11-09 04:29:30,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 04:29:30,467 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-11-09 04:29:30,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 04:29:30,468 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:30,468 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:30,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 04:29:30,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:30,670 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:30,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:30,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2123675004, now seen corresponding path program 2 times [2024-11-09 04:29:30,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:30,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92282192] [2024-11-09 04:29:30,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:30,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 04:29:30,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:30,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92282192] [2024-11-09 04:29:30,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92282192] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:30,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928276832] [2024-11-09 04:29:30,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:29:30,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:30,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:30,901 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:30,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:29:30,965 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 04:29:30,965 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:29:30,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 04:29:30,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 04:29:31,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 04:29:31,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928276832] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:31,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [895015991] [2024-11-09 04:29:31,530 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:29:31,530 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:31,530 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:29:31,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:31,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 11 [2024-11-09 04:29:31,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934039556] [2024-11-09 04:29:31,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:31,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 04:29:31,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:31,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 04:29:31,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-09 04:29:31,535 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 04:29:31,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:31,614 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2024-11-09 04:29:31,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:29:31,615 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 21 [2024-11-09 04:29:31,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:31,616 INFO L225 Difference]: With dead ends: 24 [2024-11-09 04:29:31,616 INFO L226 Difference]: Without dead ends: 20 [2024-11-09 04:29:31,617 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-11-09 04:29:31,618 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:31,618 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 31 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:31,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-09 04:29:31,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-09 04:29:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 04:29:31,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2024-11-09 04:29:31,624 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2024-11-09 04:29:31,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:31,624 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2024-11-09 04:29:31,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 04:29:31,625 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2024-11-09 04:29:31,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 04:29:31,626 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:31,626 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:31,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 04:29:31,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:31,831 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:31,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:31,831 INFO L85 PathProgramCache]: Analyzing trace with hash 54189198, now seen corresponding path program 3 times [2024-11-09 04:29:31,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:31,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139026337] [2024-11-09 04:29:31,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:31,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 04:29:32,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:32,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139026337] [2024-11-09 04:29:32,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139026337] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:32,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294721841] [2024-11-09 04:29:32,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:29:32,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:32,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:32,097 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:32,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:29:32,159 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:29:32,159 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:29:32,162 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 04:29:32,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 04:29:32,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:29:33,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294721841] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:33,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1850442771] [2024-11-09 04:29:33,019 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:29:33,019 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:33,019 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:29:33,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:33,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 13 [2024-11-09 04:29:33,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064147264] [2024-11-09 04:29:33,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:33,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 04:29:33,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:33,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 04:29:33,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-11-09 04:29:33,022 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-09 04:29:33,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:33,114 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2024-11-09 04:29:33,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 04:29:33,114 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 27 [2024-11-09 04:29:33,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:33,115 INFO L225 Difference]: With dead ends: 27 [2024-11-09 04:29:33,115 INFO L226 Difference]: Without dead ends: 23 [2024-11-09 04:29:33,116 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2024-11-09 04:29:33,117 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:33,117 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 31 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:33,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-09 04:29:33,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-09 04:29:33,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 04:29:33,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2024-11-09 04:29:33,123 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2024-11-09 04:29:33,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:33,124 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2024-11-09 04:29:33,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-09 04:29:33,124 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2024-11-09 04:29:33,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 04:29:33,125 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:33,125 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:33,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 04:29:33,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:33,326 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:33,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:33,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1269749436, now seen corresponding path program 4 times [2024-11-09 04:29:33,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:33,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113718350] [2024-11-09 04:29:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:33,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 04:29:33,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:33,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113718350] [2024-11-09 04:29:33,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113718350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:33,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098486228] [2024-11-09 04:29:33,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:29:33,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:33,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:33,599 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:33,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:29:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:33,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 04:29:33,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 04:29:33,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 04:29:34,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098486228] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:34,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1768124094] [2024-11-09 04:29:34,916 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:29:34,917 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:34,917 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:29:34,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:34,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 15 [2024-11-09 04:29:34,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606083849] [2024-11-09 04:29:34,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:34,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 04:29:34,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:34,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 04:29:34,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-11-09 04:29:34,922 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 04:29:35,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:35,076 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2024-11-09 04:29:35,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:29:35,077 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 33 [2024-11-09 04:29:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:35,078 INFO L225 Difference]: With dead ends: 30 [2024-11-09 04:29:35,078 INFO L226 Difference]: Without dead ends: 26 [2024-11-09 04:29:35,078 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2024-11-09 04:29:35,080 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:35,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 41 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:35,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-09 04:29:35,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-09 04:29:35,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 04:29:35,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2024-11-09 04:29:35,091 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2024-11-09 04:29:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:35,091 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2024-11-09 04:29:35,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 04:29:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2024-11-09 04:29:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 04:29:35,095 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:35,095 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:35,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 04:29:35,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:35,300 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:35,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:35,300 INFO L85 PathProgramCache]: Analyzing trace with hash -4035634, now seen corresponding path program 5 times [2024-11-09 04:29:35,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:35,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89164405] [2024-11-09 04:29:35,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:35,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 04:29:35,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:35,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89164405] [2024-11-09 04:29:35,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89164405] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:35,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572823804] [2024-11-09 04:29:35,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:29:35,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:35,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:35,602 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:35,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 04:29:35,683 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 04:29:35,683 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:29:35,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 04:29:35,687 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 04:29:35,754 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 04:29:37,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572823804] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:37,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [707477549] [2024-11-09 04:29:37,295 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:29:37,295 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:37,295 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:29:37,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:37,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2024-11-09 04:29:37,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214893887] [2024-11-09 04:29:37,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:37,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 04:29:37,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:37,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 04:29:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2024-11-09 04:29:37,303 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-09 04:29:37,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:37,424 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2024-11-09 04:29:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 04:29:37,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) Word has length 39 [2024-11-09 04:29:37,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:37,425 INFO L225 Difference]: With dead ends: 33 [2024-11-09 04:29:37,426 INFO L226 Difference]: Without dead ends: 29 [2024-11-09 04:29:37,426 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2024-11-09 04:29:37,427 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:37,428 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:37,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-09 04:29:37,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-09 04:29:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 04:29:37,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2024-11-09 04:29:37,433 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2024-11-09 04:29:37,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:37,434 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2024-11-09 04:29:37,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-09 04:29:37,434 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2024-11-09 04:29:37,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 04:29:37,435 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:37,435 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:37,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 04:29:37,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 04:29:37,639 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:37,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:37,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1047611388, now seen corresponding path program 6 times [2024-11-09 04:29:37,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:37,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352656206] [2024-11-09 04:29:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:37,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-09 04:29:37,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:37,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352656206] [2024-11-09 04:29:37,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352656206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:37,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55947942] [2024-11-09 04:29:37,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:29:37,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:37,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:37,837 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:37,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 04:29:37,918 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:29:37,919 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:29:37,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 04:29:37,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-09 04:29:37,995 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 04:29:40,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55947942] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:40,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [255248737] [2024-11-09 04:29:40,004 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:29:40,004 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:40,004 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:29:40,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:40,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 19 [2024-11-09 04:29:40,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496689298] [2024-11-09 04:29:40,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:40,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 04:29:40,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:40,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 04:29:40,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2024-11-09 04:29:40,008 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-09 04:29:40,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:40,182 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-11-09 04:29:40,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 04:29:40,183 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) Word has length 45 [2024-11-09 04:29:40,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:40,184 INFO L225 Difference]: With dead ends: 36 [2024-11-09 04:29:40,184 INFO L226 Difference]: Without dead ends: 32 [2024-11-09 04:29:40,185 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2024-11-09 04:29:40,187 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 59 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:40,188 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 51 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:40,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-09 04:29:40,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-09 04:29:40,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-09 04:29:40,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2024-11-09 04:29:40,199 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2024-11-09 04:29:40,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:40,200 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2024-11-09 04:29:40,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-09 04:29:40,200 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2024-11-09 04:29:40,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 04:29:40,201 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:40,201 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:40,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 04:29:40,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:40,402 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:40,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:40,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1466649358, now seen corresponding path program 7 times [2024-11-09 04:29:40,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:40,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431748204] [2024-11-09 04:29:40,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:40,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-09 04:29:40,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:40,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431748204] [2024-11-09 04:29:40,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431748204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:40,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823673889] [2024-11-09 04:29:40,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:29:40,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:40,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:40,642 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:40,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 04:29:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:40,765 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 04:29:40,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-09 04:29:40,902 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 04:29:43,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823673889] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:43,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [299822401] [2024-11-09 04:29:43,914 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:29:43,914 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:43,915 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:29:43,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:43,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2024-11-09 04:29:43,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599873266] [2024-11-09 04:29:43,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:43,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 04:29:43,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:43,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 04:29:43,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2024-11-09 04:29:43,919 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2024-11-09 04:29:44,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:44,116 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2024-11-09 04:29:44,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 04:29:44,117 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 51 [2024-11-09 04:29:44,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:44,118 INFO L225 Difference]: With dead ends: 39 [2024-11-09 04:29:44,119 INFO L226 Difference]: Without dead ends: 35 [2024-11-09 04:29:44,119 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 92 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2024-11-09 04:29:44,120 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:44,120 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 55 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:44,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-09 04:29:44,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-09 04:29:44,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 04:29:44,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2024-11-09 04:29:44,127 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2024-11-09 04:29:44,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:44,128 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2024-11-09 04:29:44,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2024-11-09 04:29:44,129 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2024-11-09 04:29:44,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-09 04:29:44,130 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:44,130 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:44,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 04:29:44,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:44,331 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:44,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:44,333 INFO L85 PathProgramCache]: Analyzing trace with hash 335541956, now seen corresponding path program 8 times [2024-11-09 04:29:44,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:44,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944393181] [2024-11-09 04:29:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:44,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-09 04:29:44,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:44,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944393181] [2024-11-09 04:29:44,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944393181] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:44,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443540314] [2024-11-09 04:29:44,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:29:44,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:44,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:44,657 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:44,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 04:29:44,807 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-09 04:29:44,807 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:29:44,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 04:29:44,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-09 04:29:44,903 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 04:29:49,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443540314] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:49,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1148112828] [2024-11-09 04:29:49,364 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:29:49,364 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:49,364 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:29:49,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:49,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 23 [2024-11-09 04:29:49,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127241162] [2024-11-09 04:29:49,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:49,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 04:29:49,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:49,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 04:29:49,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2024-11-09 04:29:49,369 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2024-11-09 04:29:49,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:49,608 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2024-11-09 04:29:49,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 04:29:49,609 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) Word has length 57 [2024-11-09 04:29:49,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:49,610 INFO L225 Difference]: With dead ends: 42 [2024-11-09 04:29:49,613 INFO L226 Difference]: Without dead ends: 38 [2024-11-09 04:29:49,614 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 103 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2024-11-09 04:29:49,615 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 85 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:49,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 59 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:49,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-09 04:29:49,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-09 04:29:49,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-09 04:29:49,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2024-11-09 04:29:49,627 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2024-11-09 04:29:49,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:49,627 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2024-11-09 04:29:49,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2024-11-09 04:29:49,628 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2024-11-09 04:29:49,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 04:29:49,629 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:49,630 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:49,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 04:29:49,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 04:29:49,834 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:49,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:49,835 INFO L85 PathProgramCache]: Analyzing trace with hash -682001842, now seen corresponding path program 9 times [2024-11-09 04:29:49,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:49,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706572499] [2024-11-09 04:29:49,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:49,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-09 04:29:50,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:50,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706572499] [2024-11-09 04:29:50,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706572499] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:50,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353036479] [2024-11-09 04:29:50,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:29:50,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:50,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:50,223 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:50,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 04:29:50,478 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:29:50,478 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:29:50,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 04:29:50,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-09 04:29:50,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 04:29:56,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353036479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:56,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [736683243] [2024-11-09 04:29:56,252 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:29:56,252 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:56,252 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:29:56,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:56,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 25 [2024-11-09 04:29:56,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967604190] [2024-11-09 04:29:56,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:56,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 04:29:56,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:56,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 04:29:56,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2024-11-09 04:29:56,257 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) [2024-11-09 04:29:56,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:56,510 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2024-11-09 04:29:56,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 04:29:56,511 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) Word has length 63 [2024-11-09 04:29:56,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:56,512 INFO L225 Difference]: With dead ends: 45 [2024-11-09 04:29:56,512 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 04:29:56,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 114 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=356, Invalid=766, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 04:29:56,517 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 114 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:56,518 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 59 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:56,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 04:29:56,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-09 04:29:56,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-09 04:29:56,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2024-11-09 04:29:56,532 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2024-11-09 04:29:56,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:56,533 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2024-11-09 04:29:56,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) [2024-11-09 04:29:56,533 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2024-11-09 04:29:56,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-09 04:29:56,534 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:56,534 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:56,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 04:29:56,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 04:29:56,735 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:56,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:56,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1904272772, now seen corresponding path program 10 times [2024-11-09 04:29:56,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:56,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947724874] [2024-11-09 04:29:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:56,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-11-09 04:29:57,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:57,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947724874] [2024-11-09 04:29:57,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947724874] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:57,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205972019] [2024-11-09 04:29:57,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:29:57,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:57,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:57,208 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:57,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 04:29:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:57,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 04:29:57,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-11-09 04:29:57,577 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 04:30:04,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205972019] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:04,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [439285336] [2024-11-09 04:30:04,606 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:30:04,607 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:04,607 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:30:04,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:30:04,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 27 [2024-11-09 04:30:04,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174269075] [2024-11-09 04:30:04,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:04,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 04:30:04,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:04,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 04:30:04,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2024-11-09 04:30:04,612 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 27 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (22), 11 states have call predecessors, (22), 13 states have call successors, (22) [2024-11-09 04:30:04,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:04,844 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2024-11-09 04:30:04,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 04:30:04,845 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (22), 11 states have call predecessors, (22), 13 states have call successors, (22) Word has length 69 [2024-11-09 04:30:04,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:04,846 INFO L225 Difference]: With dead ends: 48 [2024-11-09 04:30:04,846 INFO L226 Difference]: Without dead ends: 44 [2024-11-09 04:30:04,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 125 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=424, Invalid=908, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 04:30:04,848 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 70 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:04,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 61 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:30:04,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-09 04:30:04,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-09 04:30:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 30 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-09 04:30:04,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2024-11-09 04:30:04,856 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2024-11-09 04:30:04,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:04,857 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2024-11-09 04:30:04,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (22), 11 states have call predecessors, (22), 13 states have call successors, (22) [2024-11-09 04:30:04,857 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2024-11-09 04:30:04,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 04:30:04,859 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:04,859 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:04,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 04:30:05,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 04:30:05,060 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:05,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:05,062 INFO L85 PathProgramCache]: Analyzing trace with hash -776930930, now seen corresponding path program 11 times [2024-11-09 04:30:05,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:05,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627004815] [2024-11-09 04:30:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:05,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-09 04:30:05,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:05,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627004815] [2024-11-09 04:30:05,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627004815] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:05,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668049726] [2024-11-09 04:30:05,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:30:05,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:05,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:05,469 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:05,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 04:30:05,796 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-09 04:30:05,797 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:30:05,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 04:30:05,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-09 04:30:05,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-09 04:30:14,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668049726] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:14,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [738176619] [2024-11-09 04:30:14,938 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:30:14,939 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:14,939 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:30:14,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:30:14,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 29 [2024-11-09 04:30:14,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313765338] [2024-11-09 04:30:14,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:14,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 04:30:14,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:14,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 04:30:14,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2024-11-09 04:30:14,944 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 29 states, 27 states have (on average 2.037037037037037) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) [2024-11-09 04:30:15,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:15,268 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2024-11-09 04:30:15,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 04:30:15,269 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.037037037037037) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) Word has length 75 [2024-11-09 04:30:15,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:15,270 INFO L225 Difference]: With dead ends: 51 [2024-11-09 04:30:15,270 INFO L226 Difference]: Without dead ends: 47 [2024-11-09 04:30:15,272 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 136 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=1062, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 04:30:15,273 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 157 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:15,273 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 71 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:30:15,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-09 04:30:15,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-09 04:30:15,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 04:30:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2024-11-09 04:30:15,281 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2024-11-09 04:30:15,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:15,282 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2024-11-09 04:30:15,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.037037037037037) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) [2024-11-09 04:30:15,283 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2024-11-09 04:30:15,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 04:30:15,284 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:15,284 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:15,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 04:30:15,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 04:30:15,488 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:15,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:15,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1158839228, now seen corresponding path program 12 times [2024-11-09 04:30:15,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:15,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612134283] [2024-11-09 04:30:15,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:15,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-09 04:30:15,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:15,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612134283] [2024-11-09 04:30:15,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612134283] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:15,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185274459] [2024-11-09 04:30:15,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:30:15,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:15,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:16,000 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:16,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 04:30:16,541 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:30:16,542 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:30:16,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 04:30:16,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-09 04:30:16,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-09 04:30:28,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185274459] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:28,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [292901546] [2024-11-09 04:30:28,912 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:30:28,912 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:28,912 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:30:28,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:30:28,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 31 [2024-11-09 04:30:28,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436269126] [2024-11-09 04:30:28,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:28,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 04:30:28,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:28,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 04:30:28,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2024-11-09 04:30:28,916 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 31 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (26), 13 states have call predecessors, (26), 15 states have call successors, (26) [2024-11-09 04:30:29,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:29,209 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2024-11-09 04:30:29,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 04:30:29,213 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (26), 13 states have call predecessors, (26), 15 states have call successors, (26) Word has length 81 [2024-11-09 04:30:29,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:29,214 INFO L225 Difference]: With dead ends: 54 [2024-11-09 04:30:29,214 INFO L226 Difference]: Without dead ends: 50 [2024-11-09 04:30:29,215 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 147 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=578, Invalid=1228, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 04:30:29,215 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 159 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:29,216 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 77 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:30:29,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-09 04:30:29,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-09 04:30:29,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 34 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-09 04:30:29,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2024-11-09 04:30:29,223 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2024-11-09 04:30:29,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:29,224 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2024-11-09 04:30:29,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (26), 13 states have call predecessors, (26), 15 states have call successors, (26) [2024-11-09 04:30:29,224 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2024-11-09 04:30:29,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 04:30:29,225 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:29,226 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:29,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 04:30:29,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 04:30:29,427 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:29,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:29,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1570097358, now seen corresponding path program 13 times [2024-11-09 04:30:29,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:29,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324293858] [2024-11-09 04:30:29,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:29,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-09 04:30:29,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:29,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324293858] [2024-11-09 04:30:29,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324293858] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:29,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061070522] [2024-11-09 04:30:29,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:30:29,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:29,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:29,943 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:29,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 04:30:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:30,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 04:30:30,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-09 04:30:30,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-09 04:30:44,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061070522] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:44,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [562358310] [2024-11-09 04:30:44,400 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:30:44,400 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:44,400 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:30:44,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:30:44,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 33 [2024-11-09 04:30:44,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724651417] [2024-11-09 04:30:44,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:44,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 04:30:44,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:44,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 04:30:44,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 04:30:44,405 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 33 states, 31 states have (on average 2.032258064516129) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 14 states have call predecessors, (28), 16 states have call successors, (28) [2024-11-09 04:30:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:44,801 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2024-11-09 04:30:44,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 04:30:44,802 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.032258064516129) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 14 states have call predecessors, (28), 16 states have call successors, (28) Word has length 87 [2024-11-09 04:30:44,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:44,804 INFO L225 Difference]: With dead ends: 57 [2024-11-09 04:30:44,804 INFO L226 Difference]: Without dead ends: 53 [2024-11-09 04:30:44,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 158 SyntacticMatches, 14 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=664, Invalid=1406, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 04:30:44,806 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 177 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:44,806 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 83 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:30:44,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-09 04:30:44,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-09 04:30:44,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-09 04:30:44,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2024-11-09 04:30:44,814 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2024-11-09 04:30:44,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:44,815 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2024-11-09 04:30:44,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.032258064516129) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 14 states have call predecessors, (28), 16 states have call successors, (28) [2024-11-09 04:30:44,816 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2024-11-09 04:30:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-09 04:30:44,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:44,818 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:44,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 04:30:45,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 04:30:45,022 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:45,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:45,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1407069436, now seen corresponding path program 14 times [2024-11-09 04:30:45,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:45,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428431755] [2024-11-09 04:30:45,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:45,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-11-09 04:30:45,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:45,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428431755] [2024-11-09 04:30:45,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428431755] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:45,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361371470] [2024-11-09 04:30:45,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:30:45,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:45,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:45,655 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:45,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 04:30:46,503 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-09 04:30:46,503 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:30:46,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 04:30:46,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-11-09 04:30:46,628 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:31:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-09 04:31:04,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361371470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:31:04,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [911389648] [2024-11-09 04:31:04,417 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:31:04,418 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:31:04,418 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:31:04,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:31:04,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 35 [2024-11-09 04:31:04,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207491449] [2024-11-09 04:31:04,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:31:04,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 04:31:04,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:04,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 04:31:04,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 04:31:04,422 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 35 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (30), 15 states have call predecessors, (30), 17 states have call successors, (30) [2024-11-09 04:31:04,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:04,748 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2024-11-09 04:31:04,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 04:31:04,748 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (30), 15 states have call predecessors, (30), 17 states have call successors, (30) Word has length 93 [2024-11-09 04:31:04,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:04,749 INFO L225 Difference]: With dead ends: 60 [2024-11-09 04:31:04,749 INFO L226 Difference]: Without dead ends: 56 [2024-11-09 04:31:04,750 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 169 SyntacticMatches, 15 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 04:31:04,751 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 224 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:04,751 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 79 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:31:04,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-09 04:31:04,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-09 04:31:04,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.027027027027027) internal successors, (38), 38 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-09 04:31:04,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2024-11-09 04:31:04,758 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2024-11-09 04:31:04,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:04,758 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2024-11-09 04:31:04,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (30), 15 states have call predecessors, (30), 17 states have call successors, (30) [2024-11-09 04:31:04,759 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2024-11-09 04:31:04,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-09 04:31:04,760 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:04,760 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:04,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 04:31:04,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 04:31:04,961 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:31:04,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:04,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1758730226, now seen corresponding path program 15 times [2024-11-09 04:31:04,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:04,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374177471] [2024-11-09 04:31:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:04,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-11-09 04:31:05,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:05,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374177471] [2024-11-09 04:31:05,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374177471] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:31:05,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383870476] [2024-11-09 04:31:05,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:31:05,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:05,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:31:05,480 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:31:05,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 04:31:06,309 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:31:06,310 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:31:06,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 04:31:06,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:31:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-11-09 04:31:06,422 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:31:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-09 04:31:28,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383870476] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:31:28,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1290691776] [2024-11-09 04:31:28,886 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:31:28,886 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:31:28,886 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:31:28,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:31:28,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 37 [2024-11-09 04:31:28,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806023709] [2024-11-09 04:31:28,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:31:28,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-09 04:31:28,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:28,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-09 04:31:28,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=988, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 04:31:28,889 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 37 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 36 states have internal predecessors, (71), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (32), 16 states have call predecessors, (32), 18 states have call successors, (32) [2024-11-09 04:31:29,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:29,197 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2024-11-09 04:31:29,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 04:31:29,198 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 36 states have internal predecessors, (71), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (32), 16 states have call predecessors, (32), 18 states have call successors, (32) Word has length 99 [2024-11-09 04:31:29,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:29,199 INFO L225 Difference]: With dead ends: 63 [2024-11-09 04:31:29,199 INFO L226 Difference]: Without dead ends: 59 [2024-11-09 04:31:29,200 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 180 SyntacticMatches, 16 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=854, Invalid=1798, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 04:31:29,201 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:29,201 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 93 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:31:29,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-09 04:31:29,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-11-09 04:31:29,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-09 04:31:29,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2024-11-09 04:31:29,208 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2024-11-09 04:31:29,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:29,209 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2024-11-09 04:31:29,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 36 states have internal predecessors, (71), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (32), 16 states have call predecessors, (32), 18 states have call successors, (32) [2024-11-09 04:31:29,210 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2024-11-09 04:31:29,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-09 04:31:29,211 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:29,211 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:29,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 04:31:29,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:29,412 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:31:29,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:29,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1678126652, now seen corresponding path program 16 times [2024-11-09 04:31:29,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:29,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292501371] [2024-11-09 04:31:29,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:29,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-11-09 04:31:30,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:30,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292501371] [2024-11-09 04:31:30,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292501371] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:31:30,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620440169] [2024-11-09 04:31:30,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:31:30,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:30,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:31:30,024 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:31:30,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 04:31:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:31,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-09 04:31:31,109 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:31:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-11-09 04:31:31,220 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:31:58,811 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-09 04:31:58,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620440169] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:31:58,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1036292417] [2024-11-09 04:31:58,813 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:31:58,813 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:31:58,813 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:31:58,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:31:58,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 37] total 39 [2024-11-09 04:31:58,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12699516] [2024-11-09 04:31:58,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:31:58,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-09 04:31:58,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:58,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-09 04:31:58,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1100, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 04:31:58,817 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 39 states, 37 states have (on average 2.027027027027027) internal successors, (75), 38 states have internal predecessors, (75), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (34), 17 states have call predecessors, (34), 19 states have call successors, (34) [2024-11-09 04:31:59,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:59,158 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2024-11-09 04:31:59,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 04:31:59,158 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.027027027027027) internal successors, (75), 38 states have internal predecessors, (75), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (34), 17 states have call predecessors, (34), 19 states have call successors, (34) Word has length 105 [2024-11-09 04:31:59,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:59,160 INFO L225 Difference]: With dead ends: 66 [2024-11-09 04:31:59,160 INFO L226 Difference]: Without dead ends: 62 [2024-11-09 04:31:59,161 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 191 SyntacticMatches, 17 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=958, Invalid=2012, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 04:31:59,162 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 57 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:59,162 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 91 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:31:59,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-09 04:31:59,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-09 04:31:59,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.024390243902439) internal successors, (42), 42 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-09 04:31:59,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2024-11-09 04:31:59,169 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2024-11-09 04:31:59,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:59,170 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2024-11-09 04:31:59,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.027027027027027) internal successors, (75), 38 states have internal predecessors, (75), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (34), 17 states have call predecessors, (34), 19 states have call successors, (34) [2024-11-09 04:31:59,170 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2024-11-09 04:31:59,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-09 04:31:59,172 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:59,172 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:59,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 04:31:59,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:59,373 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:31:59,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:59,373 INFO L85 PathProgramCache]: Analyzing trace with hash -543729842, now seen corresponding path program 17 times [2024-11-09 04:31:59,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:59,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641921201] [2024-11-09 04:31:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:59,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-11-09 04:32:00,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:00,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641921201] [2024-11-09 04:32:00,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641921201] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:32:00,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044209243] [2024-11-09 04:32:00,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:32:00,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:00,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:32:00,082 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:32:00,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 04:32:01,551 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-09 04:32:01,551 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:32:01,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 04:32:01,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:32:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-11-09 04:32:01,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:32:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-09 04:32:39,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044209243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:32:39,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [184988887] [2024-11-09 04:32:39,398 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:32:39,398 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:32:39,399 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:32:39,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:32:39,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 39] total 41 [2024-11-09 04:32:39,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992851146] [2024-11-09 04:32:39,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:32:39,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 04:32:39,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:39,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 04:32:39,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1218, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 04:32:39,403 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 41 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 40 states have internal predecessors, (79), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (36), 18 states have call predecessors, (36), 20 states have call successors, (36) [2024-11-09 04:32:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:39,870 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2024-11-09 04:32:39,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 04:32:39,871 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 40 states have internal predecessors, (79), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (36), 18 states have call predecessors, (36), 20 states have call successors, (36) Word has length 111 [2024-11-09 04:32:39,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:39,872 INFO L225 Difference]: With dead ends: 69 [2024-11-09 04:32:39,872 INFO L226 Difference]: Without dead ends: 65 [2024-11-09 04:32:39,874 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 202 SyntacticMatches, 18 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1068, Invalid=2238, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 04:32:39,875 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 320 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:39,875 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 97 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:32:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-09 04:32:39,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-09 04:32:39,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2024-11-09 04:32:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2024-11-09 04:32:39,888 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2024-11-09 04:32:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:39,888 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2024-11-09 04:32:39,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 40 states have internal predecessors, (79), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (36), 18 states have call predecessors, (36), 20 states have call successors, (36) [2024-11-09 04:32:39,889 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2024-11-09 04:32:39,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-09 04:32:39,891 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:39,891 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:39,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 04:32:40,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 04:32:40,096 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:32:40,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:40,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1011974276, now seen corresponding path program 18 times [2024-11-09 04:32:40,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:40,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006826507] [2024-11-09 04:32:40,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:40,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-11-09 04:32:40,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:40,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006826507] [2024-11-09 04:32:40,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006826507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:32:40,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070234014] [2024-11-09 04:32:40,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:32:40,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:40,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:32:40,940 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:32:40,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 04:32:42,825 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:32:42,826 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:32:42,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-09 04:32:42,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:32:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-11-09 04:32:42,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:33:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-11-09 04:33:27,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070234014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:33:27,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [992468600] [2024-11-09 04:33:27,907 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:33:27,908 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:33:27,908 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:33:27,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:33:27,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 41] total 43 [2024-11-09 04:33:27,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103081863] [2024-11-09 04:33:27,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:33:27,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-09 04:33:27,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:27,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-09 04:33:27,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=1342, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 04:33:27,913 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 43 states, 41 states have (on average 2.024390243902439) internal successors, (83), 42 states have internal predecessors, (83), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (38), 19 states have call predecessors, (38), 21 states have call successors, (38) [2024-11-09 04:33:28,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:28,447 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2024-11-09 04:33:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 04:33:28,447 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.024390243902439) internal successors, (83), 42 states have internal predecessors, (83), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (38), 19 states have call predecessors, (38), 21 states have call successors, (38) Word has length 117 [2024-11-09 04:33:28,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:28,449 INFO L225 Difference]: With dead ends: 72 [2024-11-09 04:33:28,449 INFO L226 Difference]: Without dead ends: 68 [2024-11-09 04:33:28,450 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 213 SyntacticMatches, 19 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1184, Invalid=2476, Unknown=0, NotChecked=0, Total=3660 [2024-11-09 04:33:28,453 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 173 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:28,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 103 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:33:28,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-09 04:33:28,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-11-09 04:33:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 46 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2024-11-09 04:33:28,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2024-11-09 04:33:28,467 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2024-11-09 04:33:28,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:28,467 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2024-11-09 04:33:28,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.024390243902439) internal successors, (83), 42 states have internal predecessors, (83), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (38), 19 states have call predecessors, (38), 21 states have call successors, (38) [2024-11-09 04:33:28,468 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2024-11-09 04:33:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 04:33:28,473 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:28,473 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:28,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 04:33:28,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:28,674 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:28,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:28,675 INFO L85 PathProgramCache]: Analyzing trace with hash 486282894, now seen corresponding path program 19 times [2024-11-09 04:33:28,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:28,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321922356] [2024-11-09 04:33:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:28,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2024-11-09 04:33:29,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:29,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321922356] [2024-11-09 04:33:29,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321922356] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:29,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199653338] [2024-11-09 04:33:29,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:33:29,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:29,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:29,561 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:29,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 04:33:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:31,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 04:33:31,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2024-11-09 04:33:32,163 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:34:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-09 04:34:25,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199653338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:34:25,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [798961689] [2024-11-09 04:34:25,288 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:34:25,288 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:34:25,289 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:34:25,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:34:25,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 43] total 44 [2024-11-09 04:34:25,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957320289] [2024-11-09 04:34:25,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:34:25,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-09 04:34:25,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:34:25,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-09 04:34:25,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 04:34:25,294 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 44 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 21 states have call successors, (21), 1 states have call predecessors, (21), 20 states have return successors, (39), 20 states have call predecessors, (39), 21 states have call successors, (39) [2024-11-09 04:34:25,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:34:25,783 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2024-11-09 04:34:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 04:34:25,783 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 21 states have call successors, (21), 1 states have call predecessors, (21), 20 states have return successors, (39), 20 states have call predecessors, (39), 21 states have call successors, (39) Word has length 123 [2024-11-09 04:34:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:34:25,785 INFO L225 Difference]: With dead ends: 75 [2024-11-09 04:34:25,785 INFO L226 Difference]: Without dead ends: 71 [2024-11-09 04:34:25,786 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 224 SyntacticMatches, 21 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1303, Invalid=2603, Unknown=0, NotChecked=0, Total=3906 [2024-11-09 04:34:25,787 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 249 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:34:25,787 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 99 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:34:25,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-09 04:34:25,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-11-09 04:34:25,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 48 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2024-11-09 04:34:25,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2024-11-09 04:34:25,794 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2024-11-09 04:34:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:34:25,794 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2024-11-09 04:34:25,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 21 states have call successors, (21), 1 states have call predecessors, (21), 20 states have return successors, (39), 20 states have call predecessors, (39), 21 states have call successors, (39) [2024-11-09 04:34:25,795 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2024-11-09 04:34:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-09 04:34:25,796 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:34:25,797 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:34:25,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 04:34:25,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:34:25,997 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:34:25,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:34:25,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1510268740, now seen corresponding path program 20 times [2024-11-09 04:34:25,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:34:25,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926534574] [2024-11-09 04:34:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:34:25,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:34:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:34:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 570 proven. 79 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2024-11-09 04:34:29,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:34:29,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926534574] [2024-11-09 04:34:29,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926534574] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:34:29,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78360672] [2024-11-09 04:34:29,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:34:29,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:34:29,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:34:29,989 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:34:29,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 04:34:32,677 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2024-11-09 04:34:32,677 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:34:32,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-11-09 04:34:32,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:34:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 39 proven. 610 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2024-11-09 04:34:36,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:34:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 649 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2024-11-09 04:34:50,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78360672] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:34:50,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [925328392] [2024-11-09 04:34:50,480 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 04:34:50,480 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:34:50,481 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:34:50,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:34:50,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 99 [2024-11-09 04:34:50,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923935363] [2024-11-09 04:34:50,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:34:50,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-11-09 04:34:50,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:34:50,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-11-09 04:34:50,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=9113, Unknown=0, NotChecked=0, Total=9702 [2024-11-09 04:34:50,486 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 99 states, 94 states have (on average 1.0957446808510638) internal successors, (103), 56 states have internal predecessors, (103), 7 states have call successors, (7), 1 states have call predecessors, (7), 43 states have return successors, (44), 42 states have call predecessors, (44), 7 states have call successors, (44) [2024-11-09 04:34:55,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:34:55,299 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2024-11-09 04:34:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-09 04:34:55,300 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 94 states have (on average 1.0957446808510638) internal successors, (103), 56 states have internal predecessors, (103), 7 states have call successors, (7), 1 states have call predecessors, (7), 43 states have return successors, (44), 42 states have call predecessors, (44), 7 states have call successors, (44) Word has length 129 [2024-11-09 04:34:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:34:55,301 INFO L225 Difference]: With dead ends: 74 [2024-11-09 04:34:55,301 INFO L226 Difference]: Without dead ends: 0 [2024-11-09 04:34:55,306 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4781 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1618, Invalid=18974, Unknown=0, NotChecked=0, Total=20592 [2024-11-09 04:34:55,307 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 254 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:34:55,308 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 1117 Invalid, 2730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-09 04:34:55,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-09 04:34:55,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-09 04:34:55,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 04:34:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-09 04:34:55,309 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 129 [2024-11-09 04:34:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:34:55,309 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-09 04:34:55,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 94 states have (on average 1.0957446808510638) internal successors, (103), 56 states have internal predecessors, (103), 7 states have call successors, (7), 1 states have call predecessors, (7), 43 states have return successors, (44), 42 states have call predecessors, (44), 7 states have call successors, (44) [2024-11-09 04:34:55,310 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-09 04:34:55,310 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-09 04:34:55,313 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-09 04:34:55,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 04:34:55,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 04:34:55,518 INFO L407 BasicCegarLoop]: Path program histogram: [20, 1] [2024-11-09 04:34:55,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-09 04:34:56,693 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 04:34:56,843 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 04:34:56 BoogieIcfgContainer [2024-11-09 04:34:56,843 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 04:34:56,844 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 04:34:56,845 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 04:34:56,845 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 04:34:56,846 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:29:28" (3/4) ... [2024-11-09 04:34:56,850 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-09 04:34:56,856 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2024-11-09 04:34:56,862 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-11-09 04:34:56,863 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-11-09 04:34:56,863 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-09 04:34:56,863 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-09 04:34:56,995 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/witness.graphml [2024-11-09 04:34:56,996 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/witness.yml [2024-11-09 04:34:56,996 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 04:34:56,997 INFO L158 Benchmark]: Toolchain (without parser) took 328674.64ms. Allocated memory was 178.3MB in the beginning and 1.1GB in the end (delta: 945.8MB). Free memory was 136.2MB in the beginning and 618.7MB in the end (delta: -482.5MB). Peak memory consumption was 464.9MB. Max. memory is 16.1GB. [2024-11-09 04:34:56,997 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 123.7MB. Free memory is still 69.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 04:34:56,998 INFO L158 Benchmark]: CACSL2BoogieTranslator took 268.43ms. Allocated memory is still 178.3MB. Free memory was 136.2MB in the beginning and 124.2MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-09 04:34:56,998 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.02ms. Allocated memory is still 178.3MB. Free memory was 124.2MB in the beginning and 123.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 04:34:56,999 INFO L158 Benchmark]: Boogie Preprocessor took 16.77ms. Allocated memory is still 178.3MB. Free memory was 122.6MB in the beginning and 122.1MB in the end (delta: 502.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 04:34:56,999 INFO L158 Benchmark]: RCFGBuilder took 342.11ms. Allocated memory is still 178.3MB. Free memory was 121.6MB in the beginning and 111.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-09 04:34:57,000 INFO L158 Benchmark]: TraceAbstraction took 327855.92ms. Allocated memory was 178.3MB in the beginning and 1.1GB in the end (delta: 945.8MB). Free memory was 110.6MB in the beginning and 623.9MB in the end (delta: -513.3MB). Peak memory consumption was 435.5MB. Max. memory is 16.1GB. [2024-11-09 04:34:57,000 INFO L158 Benchmark]: Witness Printer took 151.74ms. Allocated memory is still 1.1GB. Free memory was 622.9MB in the beginning and 618.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-09 04:34:57,002 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 123.7MB. Free memory is still 69.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 268.43ms. Allocated memory is still 178.3MB. Free memory was 136.2MB in the beginning and 124.2MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.02ms. Allocated memory is still 178.3MB. Free memory was 124.2MB in the beginning and 123.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 16.77ms. Allocated memory is still 178.3MB. Free memory was 122.6MB in the beginning and 122.1MB in the end (delta: 502.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 342.11ms. Allocated memory is still 178.3MB. Free memory was 121.6MB in the beginning and 111.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 327855.92ms. Allocated memory was 178.3MB in the beginning and 1.1GB in the end (delta: 945.8MB). Free memory was 110.6MB in the beginning and 623.9MB in the end (delta: -513.3MB). Peak memory consumption was 435.5MB. Max. memory is 16.1GB. * Witness Printer took 151.74ms. Allocated memory is still 1.1GB. Free memory was 622.9MB in the beginning and 618.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 326.4s, OverallIterations: 21, TraceHistogramMax: 21, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 10.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2481 SdHoareTripleChecker+Valid, 3.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2230 mSDsluCounter, 2387 SdHoareTripleChecker+Invalid, 3.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2203 mSDsCounter, 1007 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4504 IncrementalHoareTripleChecker+Invalid, 5511 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1007 mSolverCounterUnsat, 184 mSDtfsCounter, 4504 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3623 GetRequests, 2604 SyntacticMatches, 210 SemanticMatches, 809 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12930 ImplicationChecksByTransitivity, 20.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=20, InterpolantAutomatonStates: 340, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 296.7s InterpolantComputationTime, 2889 NumberOfCodeBlocks, 2889 NumberOfCodeBlocksAsserted, 124 NumberOfCheckSat, 4268 ConstructedInterpolants, 0 QuantifiedInterpolants, 13833 SizeOfPredicates, 212 NumberOfNonLiveVariables, 4720 ConjunctsInSsa, 633 ConjunctsInUnsatCore, 61 InterpolantComputations, 1 PerfectInterpolantSequences, 11252/26460 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 5]: Procedure Contract for sum Derived contract for procedure sum. Ensures: (((((((((((((((((((((((n <= 10) && (\result <= ((long long) n + m))) && (\result == ((long long) m + 10))) || (((n <= 9) && (\result == ((long long) 9 + m))) && (\result <= ((long long) n + m)))) || (((\result == ((long long) 16 + m)) && (n <= 16)) && (\result <= ((long long) n + m)))) || (((\result == ((long long) 2 + m)) && (n <= 2)) && (\result <= ((long long) n + m)))) || (((\result == ((long long) 5 + m)) && (n <= 5)) && (\result <= ((long long) n + m)))) || (((\result == ((long long) 3 + m)) && (\result <= ((long long) n + m))) && (n <= 3))) || (((n <= 4) && (\result <= ((long long) n + m))) && (\result == ((long long) m + 4)))) || (((\result == ((long long) m + 13)) && (\result <= ((long long) n + m))) && (n <= 13))) || (((n <= 19) && (\result <= ((long long) n + m))) && (((long long) 19 + m) == \result))) || (((\result == ((long long) 15 + m)) && (n <= 15)) && (\result <= ((long long) n + m)))) || ((\result == ((long long) n + m)) && (n <= 0))) || (((n <= 11) && (\result == ((long long) m + 11))) && (\result <= ((long long) n + m)))) || ((\result <= ((long long) n + m)) && (((long long) 20 + m) <= \result))) || (((n <= 8) && (\result <= ((long long) n + m))) && (\result == ((long long) 8 + m)))) || (((n <= 18) && (\result == ((long long) 18 + m))) && (\result <= ((long long) n + m)))) || ((\result == ((long long) m + 1)) && (n == 1))) || (((\result == ((long long) m + 17)) && (\result <= ((long long) n + m))) && (n <= 17))) || (((n <= 7) && (\result == ((long long) 7 + m))) && (\result <= ((long long) n + m)))) || (((n <= 6) && (\result == ((long long) 6 + m))) && (\result <= ((long long) n + m)))) || (((n <= 12) && (\result == ((long long) 12 + m))) && (\result <= ((long long) n + m)))) || (((n <= 14) && (\result <= ((long long) n + m))) && (\result == ((long long) 14 + m)))) RESULT: Ultimate proved your program to be correct! [2024-11-09 04:34:57,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60da9637-87e9-47d0-8565-115d8bc035a5/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE