./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/recHanoi01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/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_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/recHanoi01.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/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_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/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 85b02fad28964214b0cd332ac12fce3136c6c5e9247130ab67f1c2c3baea22f9 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:00:06,024 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:00:06,125 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 06:00:06,133 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:00:06,135 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:00:06,174 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:00:06,175 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:00:06,176 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:00:06,177 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:00:06,177 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:00:06,178 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:00:06,178 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:00:06,179 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:00:06,179 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:00:06,179 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:00:06,180 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:00:06,180 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:00:06,181 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:00:06,181 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:00:06,182 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:00:06,182 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:00:06,186 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:00:06,187 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:00:06,187 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:00:06,187 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:00:06,188 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:00:06,188 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:00:06,188 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:00:06,189 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:00:06,189 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:00:06,189 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:00:06,189 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:00:06,190 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:00:06,192 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:00:06,193 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:00:06,193 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:00:06,194 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:00:06,194 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:00:06,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:00:06,195 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:00:06,195 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:00:06,195 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:00:06,196 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:00:06,196 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:00:06,196 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:00:06,197 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:00:06,197 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:00:06,197 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_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85b02fad28964214b0cd332ac12fce3136c6c5e9247130ab67f1c2c3baea22f9 [2024-11-09 06:00:06,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:00:06,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:00:06,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:00:06,503 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:00:06,503 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:00:06,505 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/recursive/recHanoi01.c Unable to find full path for "g++" [2024-11-09 06:00:08,480 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:00:08,678 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:00:08,679 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/sv-benchmarks/c/recursive/recHanoi01.c [2024-11-09 06:00:08,687 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/data/8a32fc8df/f4e53c88697d4170a868c93c3da47866/FLAGdc0172422 [2024-11-09 06:00:08,703 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/data/8a32fc8df/f4e53c88697d4170a868c93c3da47866 [2024-11-09 06:00:08,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:00:08,707 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:00:08,709 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:00:08,709 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:00:08,718 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:00:08,718 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:00:08" (1/1) ... [2024-11-09 06:00:08,719 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188edf19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:08, skipping insertion in model container [2024-11-09 06:00:08,720 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:00:08" (1/1) ... [2024-11-09 06:00:08,746 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:00:08,993 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_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/sv-benchmarks/c/recursive/recHanoi01.c[1213,1226] [2024-11-09 06:00:08,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:00:09,012 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:00:09,032 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_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/sv-benchmarks/c/recursive/recHanoi01.c[1213,1226] [2024-11-09 06:00:09,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:00:09,054 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:00:09,054 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:09 WrapperNode [2024-11-09 06:00:09,054 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:00:09,056 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:00:09,056 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:00:09,056 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:00:09,064 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:09" (1/1) ... [2024-11-09 06:00:09,071 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:09" (1/1) ... [2024-11-09 06:00:09,089 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2024-11-09 06:00:09,089 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:00:09,090 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:00:09,090 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:00:09,090 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:00:09,099 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:09" (1/1) ... [2024-11-09 06:00:09,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:09" (1/1) ... [2024-11-09 06:00:09,101 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:09" (1/1) ... [2024-11-09 06:00:09,101 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:09" (1/1) ... [2024-11-09 06:00:09,109 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:09" (1/1) ... [2024-11-09 06:00:09,111 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:09" (1/1) ... [2024-11-09 06:00:09,115 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:09" (1/1) ... [2024-11-09 06:00:09,116 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:09" (1/1) ... [2024-11-09 06:00:09,117 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:00:09,119 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:00:09,119 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:00:09,119 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:00:09,120 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:09" (1/1) ... [2024-11-09 06:00:09,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:00:09,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:09,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:00:09,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:00:09,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:00:09,216 INFO L130 BoogieDeclarations]: Found specification of procedure applyHanoi [2024-11-09 06:00:09,216 INFO L138 BoogieDeclarations]: Found implementation of procedure applyHanoi [2024-11-09 06:00:09,216 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2024-11-09 06:00:09,217 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2024-11-09 06:00:09,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:00:09,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:00:09,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:00:09,313 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:00:09,315 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:00:09,450 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-09 06:00:09,451 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:00:09,475 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:00:09,475 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 06:00:09,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:00:09 BoogieIcfgContainer [2024-11-09 06:00:09,476 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:00:09,479 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:00:09,479 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:00:09,483 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:00:09,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:00:08" (1/3) ... [2024-11-09 06:00:09,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78dab9bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:00:09, skipping insertion in model container [2024-11-09 06:00:09,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:09" (2/3) ... [2024-11-09 06:00:09,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78dab9bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:00:09, skipping insertion in model container [2024-11-09 06:00:09,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:00:09" (3/3) ... [2024-11-09 06:00:09,487 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi01.c [2024-11-09 06:00:09,510 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:00:09,511 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 06:00:09,584 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:00:09,591 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;@61cdbe2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:00:09,592 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 06:00:09,598 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 06:00:09,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 06:00:09,610 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:09,611 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:00:09,613 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:09,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:09,623 INFO L85 PathProgramCache]: Analyzing trace with hash -432663240, now seen corresponding path program 1 times [2024-11-09 06:00:09,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:09,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231012013] [2024-11-09 06:00:09,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:09,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:09,942 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 06:00:09,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:09,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231012013] [2024-11-09 06:00:09,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231012013] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:00:09,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:00:09,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:00:09,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528585506] [2024-11-09 06:00:09,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:00:09,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:00:09,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:09,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:00:09,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:00:09,979 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 06:00:10,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:10,093 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2024-11-09 06:00:10,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:00:10,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2024-11-09 06:00:10,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:10,109 INFO L225 Difference]: With dead ends: 38 [2024-11-09 06:00:10,110 INFO L226 Difference]: Without dead ends: 22 [2024-11-09 06:00:10,112 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 06:00:10,116 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:10,117 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 65 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:00:10,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-09 06:00:10,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-09 06:00:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-09 06:00:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2024-11-09 06:00:10,157 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 15 [2024-11-09 06:00:10,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:10,158 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2024-11-09 06:00:10,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 06:00:10,158 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2024-11-09 06:00:10,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 06:00:10,160 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:10,160 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:00:10,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:00:10,161 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:10,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:10,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1422071395, now seen corresponding path program 1 times [2024-11-09 06:00:10,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:10,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106213101] [2024-11-09 06:00:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:10,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 06:00:10,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:10,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106213101] [2024-11-09 06:00:10,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106213101] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:00:10,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249199465] [2024-11-09 06:00:10,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:10,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:10,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:10,675 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:00:10,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:00:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:10,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 06:00:10,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 06:00:10,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 06:00:11,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249199465] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:11,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [175060229] [2024-11-09 06:00:11,301 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 06:00:11,301 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:00:11,306 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 06:00:11,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:00:11,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 17 [2024-11-09 06:00:11,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996659948] [2024-11-09 06:00:11,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:00:11,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 06:00:11,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:11,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 06:00:11,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-09 06:00:11,320 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-09 06:00:11,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:11,860 INFO L93 Difference]: Finished difference Result 73 states and 103 transitions. [2024-11-09 06:00:11,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 06:00:11,861 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 25 [2024-11-09 06:00:11,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:11,864 INFO L225 Difference]: With dead ends: 73 [2024-11-09 06:00:11,866 INFO L226 Difference]: Without dead ends: 67 [2024-11-09 06:00:11,867 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2024-11-09 06:00:11,868 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:11,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 91 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:00:11,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-09 06:00:11,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2024-11-09 06:00:11,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 33 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 11 states have return successors, (33), 16 states have call predecessors, (33), 14 states have call successors, (33) [2024-11-09 06:00:11,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 82 transitions. [2024-11-09 06:00:11,901 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 82 transitions. Word has length 25 [2024-11-09 06:00:11,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:11,902 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 82 transitions. [2024-11-09 06:00:11,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-09 06:00:11,903 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 82 transitions. [2024-11-09 06:00:11,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 06:00:11,905 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:11,905 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:00:11,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 06:00:12,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:12,110 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:12,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:12,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1071008002, now seen corresponding path program 2 times [2024-11-09 06:00:12,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:12,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192905398] [2024-11-09 06:00:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:12,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:00:12,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:12,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192905398] [2024-11-09 06:00:12,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192905398] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:00:12,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291414801] [2024-11-09 06:00:12,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:00:12,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:12,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:12,336 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:00:12,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:00:12,417 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 06:00:12,417 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:00:12,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 06:00:12,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 06:00:12,546 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 06:00:13,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291414801] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:13,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2035703391] [2024-11-09 06:00:13,098 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 06:00:13,099 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:00:13,099 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 06:00:13,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:00:13,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2024-11-09 06:00:13,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623899334] [2024-11-09 06:00:13,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:00:13,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 06:00:13,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:13,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 06:00:13,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-09 06:00:13,106 INFO L87 Difference]: Start difference. First operand 56 states and 82 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-09 06:00:13,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:13,413 INFO L93 Difference]: Finished difference Result 107 states and 168 transitions. [2024-11-09 06:00:13,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 06:00:13,413 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 35 [2024-11-09 06:00:13,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:13,415 INFO L225 Difference]: With dead ends: 107 [2024-11-09 06:00:13,416 INFO L226 Difference]: Without dead ends: 73 [2024-11-09 06:00:13,417 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2024-11-09 06:00:13,418 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:13,418 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 152 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:00:13,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-09 06:00:13,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2024-11-09 06:00:13,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.121212121212121) internal successors, (37), 32 states have internal predecessors, (37), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (20), 12 states have call predecessors, (20), 11 states have call successors, (20) [2024-11-09 06:00:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2024-11-09 06:00:13,434 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 35 [2024-11-09 06:00:13,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:13,434 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2024-11-09 06:00:13,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-09 06:00:13,435 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2024-11-09 06:00:13,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-09 06:00:13,436 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:13,436 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:00:13,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 06:00:13,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:13,640 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:13,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:13,641 INFO L85 PathProgramCache]: Analyzing trace with hash -877477481, now seen corresponding path program 1 times [2024-11-09 06:00:13,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:13,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592084746] [2024-11-09 06:00:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:13,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 06:00:13,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:13,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592084746] [2024-11-09 06:00:13,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592084746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:00:13,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336653199] [2024-11-09 06:00:13,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:13,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:13,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:13,808 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:00:13,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:00:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:13,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 06:00:13,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 06:00:13,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 06:00:14,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336653199] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:14,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1895689394] [2024-11-09 06:00:14,274 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:00:14,274 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:00:14,275 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 06:00:14,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:00:14,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 13 [2024-11-09 06:00:14,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066968226] [2024-11-09 06:00:14,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:00:14,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 06:00:14,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:14,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 06:00:14,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-09 06:00:14,279 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 06:00:14,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:14,419 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2024-11-09 06:00:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 06:00:14,420 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) Word has length 31 [2024-11-09 06:00:14,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:14,421 INFO L225 Difference]: With dead ends: 61 [2024-11-09 06:00:14,421 INFO L226 Difference]: Without dead ends: 49 [2024-11-09 06:00:14,422 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-11-09 06:00:14,423 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:14,424 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 92 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:00:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-09 06:00:14,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2024-11-09 06:00:14,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2024-11-09 06:00:14,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2024-11-09 06:00:14,435 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 31 [2024-11-09 06:00:14,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:14,436 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2024-11-09 06:00:14,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 06:00:14,436 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2024-11-09 06:00:14,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 06:00:14,438 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:14,438 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:00:14,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 06:00:14,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:14,644 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:14,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:14,645 INFO L85 PathProgramCache]: Analyzing trace with hash -921128009, now seen corresponding path program 2 times [2024-11-09 06:00:14,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:14,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940592238] [2024-11-09 06:00:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:14,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 06:00:15,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:15,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940592238] [2024-11-09 06:00:15,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940592238] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:00:15,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638012783] [2024-11-09 06:00:15,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:00:15,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:15,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:15,244 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:00:15,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:00:15,362 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 06:00:15,362 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:00:15,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-09 06:00:15,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-09 06:00:15,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 06:00:16,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638012783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:16,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [960907478] [2024-11-09 06:00:16,229 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:00:16,230 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:00:16,230 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 06:00:16,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:00:16,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 18] total 32 [2024-11-09 06:00:16,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912732623] [2024-11-09 06:00:16,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:00:16,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 06:00:16,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:16,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 06:00:16,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2024-11-09 06:00:16,234 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 32 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 25 states have internal predecessors, (46), 10 states have call successors, (20), 8 states have call predecessors, (20), 14 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2024-11-09 06:00:17,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:17,340 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2024-11-09 06:00:17,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 06:00:17,341 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 25 states have internal predecessors, (46), 10 states have call successors, (20), 8 states have call predecessors, (20), 14 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) Word has length 51 [2024-11-09 06:00:17,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:17,343 INFO L225 Difference]: With dead ends: 100 [2024-11-09 06:00:17,343 INFO L226 Difference]: Without dead ends: 96 [2024-11-09 06:00:17,345 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=418, Invalid=2552, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 06:00:17,345 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:17,346 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 136 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:00:17,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-09 06:00:17,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 79. [2024-11-09 06:00:17,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 18 states have call successors, (18), 10 states have call predecessors, (18), 16 states have return successors, (44), 24 states have call predecessors, (44), 18 states have call successors, (44) [2024-11-09 06:00:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 110 transitions. [2024-11-09 06:00:17,378 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 110 transitions. Word has length 51 [2024-11-09 06:00:17,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:17,378 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 110 transitions. [2024-11-09 06:00:17,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 25 states have internal predecessors, (46), 10 states have call successors, (20), 8 states have call predecessors, (20), 14 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2024-11-09 06:00:17,379 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 110 transitions. [2024-11-09 06:00:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-09 06:00:17,384 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:17,384 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:00:17,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 06:00:17,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:17,588 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:17,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:17,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1011273987, now seen corresponding path program 3 times [2024-11-09 06:00:17,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:17,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254992379] [2024-11-09 06:00:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:17,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 06:00:17,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:17,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254992379] [2024-11-09 06:00:17,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254992379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:00:17,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004141162] [2024-11-09 06:00:17,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:00:17,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:17,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:17,775 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:00:17,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:00:17,849 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:00:17,849 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:00:17,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 06:00:17,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 06:00:17,956 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-09 06:00:18,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004141162] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:18,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1053858308] [2024-11-09 06:00:18,630 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:00:18,630 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:00:18,630 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 06:00:18,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:00:18,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 17 [2024-11-09 06:00:18,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563774977] [2024-11-09 06:00:18,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:00:18,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 06:00:18,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:18,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 06:00:18,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-09 06:00:18,634 INFO L87 Difference]: Start difference. First operand 79 states and 110 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-09 06:00:18,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:18,858 INFO L93 Difference]: Finished difference Result 98 states and 142 transitions. [2024-11-09 06:00:18,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:00:18,859 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) Word has length 57 [2024-11-09 06:00:18,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:18,861 INFO L225 Difference]: With dead ends: 98 [2024-11-09 06:00:18,861 INFO L226 Difference]: Without dead ends: 80 [2024-11-09 06:00:18,862 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 105 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-11-09 06:00:18,863 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:18,863 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 155 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:00:18,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-09 06:00:18,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2024-11-09 06:00:18,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 17 states have call successors, (17), 9 states have call predecessors, (17), 14 states have return successors, (42), 23 states have call predecessors, (42), 17 states have call successors, (42) [2024-11-09 06:00:18,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 101 transitions. [2024-11-09 06:00:18,901 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 101 transitions. Word has length 57 [2024-11-09 06:00:18,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:18,901 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 101 transitions. [2024-11-09 06:00:18,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-09 06:00:18,902 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 101 transitions. [2024-11-09 06:00:18,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-09 06:00:18,909 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:18,909 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 10, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:00:18,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 06:00:19,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:19,110 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:19,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:19,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1725025833, now seen corresponding path program 4 times [2024-11-09 06:00:19,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:19,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690553404] [2024-11-09 06:00:19,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:19,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 182 proven. 205 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2024-11-09 06:00:19,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:19,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690553404] [2024-11-09 06:00:19,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690553404] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:00:19,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640034729] [2024-11-09 06:00:19,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:00:19,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:19,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:19,458 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:00:19,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:00:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:19,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 06:00:19,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 182 proven. 205 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2024-11-09 06:00:19,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 182 proven. 218 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2024-11-09 06:00:21,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640034729] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:21,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1424775540] [2024-11-09 06:00:21,051 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:00:21,052 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:00:21,052 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 06:00:21,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:00:21,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 19 [2024-11-09 06:00:21,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439402083] [2024-11-09 06:00:21,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:00:21,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 06:00:21,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:21,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 06:00:21,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-11-09 06:00:21,055 INFO L87 Difference]: Start difference. First operand 71 states and 101 transitions. Second operand has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 14 states have call successors, (21), 2 states have call predecessors, (21), 9 states have return successors, (25), 10 states have call predecessors, (25), 14 states have call successors, (25) [2024-11-09 06:00:21,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:21,367 INFO L93 Difference]: Finished difference Result 143 states and 243 transitions. [2024-11-09 06:00:21,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 06:00:21,368 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 14 states have call successors, (21), 2 states have call predecessors, (21), 9 states have return successors, (25), 10 states have call predecessors, (25), 14 states have call successors, (25) Word has length 111 [2024-11-09 06:00:21,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:21,370 INFO L225 Difference]: With dead ends: 143 [2024-11-09 06:00:21,370 INFO L226 Difference]: Without dead ends: 86 [2024-11-09 06:00:21,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 212 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2024-11-09 06:00:21,373 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:21,373 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 172 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:00:21,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-09 06:00:21,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2024-11-09 06:00:21,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 21 states have call successors, (21), 10 states have call predecessors, (21), 11 states have return successors, (36), 22 states have call predecessors, (36), 21 states have call successors, (36) [2024-11-09 06:00:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 96 transitions. [2024-11-09 06:00:21,393 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 96 transitions. Word has length 111 [2024-11-09 06:00:21,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:21,394 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 96 transitions. [2024-11-09 06:00:21,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 14 states have call successors, (21), 2 states have call predecessors, (21), 9 states have return successors, (25), 10 states have call predecessors, (25), 14 states have call successors, (25) [2024-11-09 06:00:21,394 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 96 transitions. [2024-11-09 06:00:21,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-09 06:00:21,395 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:21,396 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:00:21,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 06:00:21,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:21,600 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:21,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:21,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1908192695, now seen corresponding path program 5 times [2024-11-09 06:00:21,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:21,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308739573] [2024-11-09 06:00:21,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:21,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 48 proven. 125 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2024-11-09 06:00:21,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:21,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308739573] [2024-11-09 06:00:21,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308739573] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:00:21,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439535696] [2024-11-09 06:00:21,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:00:21,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:21,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:21,851 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:00:21,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:00:21,968 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-09 06:00:21,968 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:00:21,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 06:00:21,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 39 proven. 106 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-11-09 06:00:22,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 39 proven. 111 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2024-11-09 06:00:22,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439535696] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:22,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [709589551] [2024-11-09 06:00:22,547 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:00:22,549 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:00:22,549 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 06:00:22,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:00:22,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 24 [2024-11-09 06:00:22,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850624653] [2024-11-09 06:00:22,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:00:22,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 06:00:22,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:22,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 06:00:22,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2024-11-09 06:00:22,554 INFO L87 Difference]: Start difference. First operand 70 states and 96 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 16 states have call successors, (19), 1 states have call predecessors, (19), 12 states have return successors, (23), 12 states have call predecessors, (23), 16 states have call successors, (23) [2024-11-09 06:00:22,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:23,000 INFO L93 Difference]: Finished difference Result 82 states and 113 transitions. [2024-11-09 06:00:23,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 06:00:23,000 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 16 states have call successors, (19), 1 states have call predecessors, (19), 12 states have return successors, (23), 12 states have call predecessors, (23), 16 states have call successors, (23) Word has length 91 [2024-11-09 06:00:23,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:23,002 INFO L225 Difference]: With dead ends: 82 [2024-11-09 06:00:23,002 INFO L226 Difference]: Without dead ends: 78 [2024-11-09 06:00:23,003 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 06:00:23,003 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:23,004 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 190 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:00:23,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-09 06:00:23,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2024-11-09 06:00:23,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 21 states have call successors, (21), 10 states have call predecessors, (21), 12 states have return successors, (37), 23 states have call predecessors, (37), 21 states have call successors, (37) [2024-11-09 06:00:23,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 99 transitions. [2024-11-09 06:00:23,021 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 99 transitions. Word has length 91 [2024-11-09 06:00:23,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:23,022 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 99 transitions. [2024-11-09 06:00:23,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 16 states have call successors, (19), 1 states have call predecessors, (19), 12 states have return successors, (23), 12 states have call predecessors, (23), 16 states have call successors, (23) [2024-11-09 06:00:23,022 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 99 transitions. [2024-11-09 06:00:23,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-09 06:00:23,024 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:23,024 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:00:23,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 06:00:23,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:23,225 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:23,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:23,225 INFO L85 PathProgramCache]: Analyzing trace with hash 768848125, now seen corresponding path program 6 times [2024-11-09 06:00:23,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:23,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765322579] [2024-11-09 06:00:23,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:23,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 34 proven. 161 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2024-11-09 06:00:24,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:24,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765322579] [2024-11-09 06:00:24,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765322579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:00:24,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486041677] [2024-11-09 06:00:24,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:00:24,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:24,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:24,138 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:00:24,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:00:24,266 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:00:24,266 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:00:24,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-09 06:00:24,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2024-11-09 06:00:24,673 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:00:26,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486041677] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:26,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1355245804] [2024-11-09 06:00:26,260 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:00:26,261 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:00:26,261 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 06:00:26,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:00:26,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 32] total 51 [2024-11-09 06:00:26,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693081578] [2024-11-09 06:00:26,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:00:26,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-09 06:00:26,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:26,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-09 06:00:26,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2365, Unknown=0, NotChecked=0, Total=2550 [2024-11-09 06:00:26,266 INFO L87 Difference]: Start difference. First operand 73 states and 99 transitions. Second operand has 51 states, 42 states have (on average 1.619047619047619) internal successors, (68), 38 states have internal predecessors, (68), 16 states have call successors, (27), 12 states have call predecessors, (27), 24 states have return successors, (33), 24 states have call predecessors, (33), 16 states have call successors, (33) [2024-11-09 06:00:30,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:30,913 INFO L93 Difference]: Finished difference Result 206 states and 278 transitions. [2024-11-09 06:00:30,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-09 06:00:30,913 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 42 states have (on average 1.619047619047619) internal successors, (68), 38 states have internal predecessors, (68), 16 states have call successors, (27), 12 states have call predecessors, (27), 24 states have return successors, (33), 24 states have call predecessors, (33), 16 states have call successors, (33) Word has length 97 [2024-11-09 06:00:30,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:30,916 INFO L225 Difference]: With dead ends: 206 [2024-11-09 06:00:30,916 INFO L226 Difference]: Without dead ends: 202 [2024-11-09 06:00:30,919 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3345 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1686, Invalid=11196, Unknown=0, NotChecked=0, Total=12882 [2024-11-09 06:00:30,920 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 390 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:30,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 368 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 06:00:30,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-09 06:00:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 184. [2024-11-09 06:00:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 98 states have internal predecessors, (104), 51 states have call successors, (51), 26 states have call predecessors, (51), 35 states have return successors, (98), 59 states have call predecessors, (98), 51 states have call successors, (98) [2024-11-09 06:00:30,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 253 transitions. [2024-11-09 06:00:30,993 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 253 transitions. Word has length 97 [2024-11-09 06:00:30,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:30,994 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 253 transitions. [2024-11-09 06:00:30,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 42 states have (on average 1.619047619047619) internal successors, (68), 38 states have internal predecessors, (68), 16 states have call successors, (27), 12 states have call predecessors, (27), 24 states have return successors, (33), 24 states have call predecessors, (33), 16 states have call successors, (33) [2024-11-09 06:00:30,995 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 253 transitions. [2024-11-09 06:00:30,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-09 06:00:30,997 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:30,997 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:00:31,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 06:00:31,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:31,198 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:31,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:31,199 INFO L85 PathProgramCache]: Analyzing trace with hash 489586039, now seen corresponding path program 7 times [2024-11-09 06:00:31,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:31,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199847599] [2024-11-09 06:00:31,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:31,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 138 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2024-11-09 06:00:31,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:31,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199847599] [2024-11-09 06:00:31,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199847599] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:00:31,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85826656] [2024-11-09 06:00:31,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:00:31,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:31,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:31,489 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:00:31,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:00:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:31,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 06:00:31,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 138 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2024-11-09 06:00:31,710 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 156 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-09 06:00:32,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85826656] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:32,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2071645329] [2024-11-09 06:00:32,941 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:00:32,942 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:00:32,942 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 06:00:32,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:00:32,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 21 [2024-11-09 06:00:32,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868951270] [2024-11-09 06:00:32,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:00:32,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 06:00:32,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:32,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 06:00:32,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-11-09 06:00:32,946 INFO L87 Difference]: Start difference. First operand 184 states and 253 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 13 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (19), 9 states have call predecessors, (19), 13 states have call successors, (19) [2024-11-09 06:00:33,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:33,231 INFO L93 Difference]: Finished difference Result 210 states and 290 transitions. [2024-11-09 06:00:33,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 06:00:33,231 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 13 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (19), 9 states have call predecessors, (19), 13 states have call successors, (19) Word has length 103 [2024-11-09 06:00:33,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:33,233 INFO L225 Difference]: With dead ends: 210 [2024-11-09 06:00:33,233 INFO L226 Difference]: Without dead ends: 172 [2024-11-09 06:00:33,234 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 195 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2024-11-09 06:00:33,235 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:33,235 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 194 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:00:33,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-09 06:00:33,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 156. [2024-11-09 06:00:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 81 states have internal predecessors, (86), 45 states have call successors, (45), 22 states have call predecessors, (45), 29 states have return successors, (88), 52 states have call predecessors, (88), 45 states have call successors, (88) [2024-11-09 06:00:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 219 transitions. [2024-11-09 06:00:33,277 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 219 transitions. Word has length 103 [2024-11-09 06:00:33,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:33,277 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 219 transitions. [2024-11-09 06:00:33,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 13 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (19), 9 states have call predecessors, (19), 13 states have call successors, (19) [2024-11-09 06:00:33,278 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 219 transitions. [2024-11-09 06:00:33,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-09 06:00:33,280 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:33,280 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 12, 11, 11, 11, 11, 11, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:00:33,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 06:00:33,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:33,481 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:33,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:33,481 INFO L85 PathProgramCache]: Analyzing trace with hash -55947011, now seen corresponding path program 8 times [2024-11-09 06:00:33,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:33,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77920970] [2024-11-09 06:00:33,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:33,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 233 proven. 268 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2024-11-09 06:00:33,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:33,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77920970] [2024-11-09 06:00:33,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77920970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:00:33,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996619435] [2024-11-09 06:00:33,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:00:33,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:33,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:33,801 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:00:33,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:00:33,966 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-09 06:00:33,967 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:00:33,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 06:00:33,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 81 proven. 231 refuted. 0 times theorem prover too weak. 824 trivial. 0 not checked. [2024-11-09 06:00:34,165 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 81 proven. 244 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2024-11-09 06:00:34,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996619435] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:34,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [819086574] [2024-11-09 06:00:34,908 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:00:34,909 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:00:34,909 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 06:00:34,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:00:34,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 29 [2024-11-09 06:00:34,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026126440] [2024-11-09 06:00:34,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:00:34,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 06:00:34,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:34,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 06:00:34,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2024-11-09 06:00:34,913 INFO L87 Difference]: Start difference. First operand 156 states and 219 transitions. Second operand has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 22 states have call successors, (26), 1 states have call predecessors, (26), 16 states have return successors, (34), 15 states have call predecessors, (34), 22 states have call successors, (34) [2024-11-09 06:00:35,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:35,511 INFO L93 Difference]: Finished difference Result 247 states and 370 transitions. [2024-11-09 06:00:35,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 06:00:35,512 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 22 states have call successors, (26), 1 states have call predecessors, (26), 16 states have return successors, (34), 15 states have call predecessors, (34), 22 states have call successors, (34) Word has length 137 [2024-11-09 06:00:35,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:35,514 INFO L225 Difference]: With dead ends: 247 [2024-11-09 06:00:35,515 INFO L226 Difference]: Without dead ends: 177 [2024-11-09 06:00:35,517 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 06:00:35,518 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:35,518 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 273 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:00:35,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-09 06:00:35,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 156. [2024-11-09 06:00:35,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 82 states have internal predecessors, (87), 45 states have call successors, (45), 23 states have call predecessors, (45), 28 states have return successors, (81), 50 states have call predecessors, (81), 45 states have call successors, (81) [2024-11-09 06:00:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 213 transitions. [2024-11-09 06:00:35,569 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 213 transitions. Word has length 137 [2024-11-09 06:00:35,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:35,570 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 213 transitions. [2024-11-09 06:00:35,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 22 states have call successors, (26), 1 states have call predecessors, (26), 16 states have return successors, (34), 15 states have call predecessors, (34), 22 states have call successors, (34) [2024-11-09 06:00:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 213 transitions. [2024-11-09 06:00:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-11-09 06:00:35,573 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:35,573 INFO L215 NwaCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:00:35,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 06:00:35,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 06:00:35,774 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:35,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:35,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1718503799, now seen corresponding path program 9 times [2024-11-09 06:00:35,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:35,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198458553] [2024-11-09 06:00:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:35,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:37,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 74 proven. 705 refuted. 0 times theorem prover too weak. 1321 trivial. 0 not checked. [2024-11-09 06:00:37,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:37,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198458553] [2024-11-09 06:00:37,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198458553] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:00:37,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322873226] [2024-11-09 06:00:37,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:00:37,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:37,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:37,934 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:00:37,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:00:38,136 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:00:38,137 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:00:38,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 175 conjuncts are in the unsatisfiable core [2024-11-09 06:00:38,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2024-11-09 06:00:38,747 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-09 06:00:42,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322873226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:42,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [801179073] [2024-11-09 06:00:42,692 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:00:42,692 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:00:42,693 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 06:00:42,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:00:42,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 58] total 83 [2024-11-09 06:00:42,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417939671] [2024-11-09 06:00:42,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:00:42,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-09 06:00:42,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:42,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-09 06:00:42,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=6505, Unknown=0, NotChecked=0, Total=6806 [2024-11-09 06:00:42,700 INFO L87 Difference]: Start difference. First operand 156 states and 213 transitions. Second operand has 83 states, 65 states have (on average 1.646153846153846) internal successors, (107), 62 states have internal predecessors, (107), 29 states have call successors, (44), 20 states have call predecessors, (44), 40 states have return successors, (54), 41 states have call predecessors, (54), 29 states have call successors, (54) [2024-11-09 06:01:10,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:01:10,531 INFO L93 Difference]: Finished difference Result 523 states and 791 transitions. [2024-11-09 06:01:10,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2024-11-09 06:01:10,532 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 65 states have (on average 1.646153846153846) internal successors, (107), 62 states have internal predecessors, (107), 29 states have call successors, (44), 20 states have call predecessors, (44), 40 states have return successors, (54), 41 states have call predecessors, (54), 29 states have call successors, (54) Word has length 183 [2024-11-09 06:01:10,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:01:10,537 INFO L225 Difference]: With dead ends: 523 [2024-11-09 06:01:10,538 INFO L226 Difference]: Without dead ends: 519 [2024-11-09 06:01:10,550 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16690 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=7719, Invalid=49641, Unknown=0, NotChecked=0, Total=57360 [2024-11-09 06:01:10,551 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 1466 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 3423 mSolverCounterSat, 3440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1472 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 6863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3440 IncrementalHoareTripleChecker+Valid, 3423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:01:10,551 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1472 Valid, 1012 Invalid, 6863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3440 Valid, 3423 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-09 06:01:10,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2024-11-09 06:01:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 436. [2024-11-09 06:01:10,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 235 states have (on average 1.0595744680851065) internal successors, (249), 231 states have internal predecessors, (249), 125 states have call successors, (125), 74 states have call predecessors, (125), 75 states have return successors, (256), 130 states have call predecessors, (256), 125 states have call successors, (256) [2024-11-09 06:01:10,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 630 transitions. [2024-11-09 06:01:10,667 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 630 transitions. Word has length 183 [2024-11-09 06:01:10,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:01:10,668 INFO L471 AbstractCegarLoop]: Abstraction has 436 states and 630 transitions. [2024-11-09 06:01:10,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 65 states have (on average 1.646153846153846) internal successors, (107), 62 states have internal predecessors, (107), 29 states have call successors, (44), 20 states have call predecessors, (44), 40 states have return successors, (54), 41 states have call predecessors, (54), 29 states have call successors, (54) [2024-11-09 06:01:10,668 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 630 transitions. [2024-11-09 06:01:10,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2024-11-09 06:01:10,674 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:01:10,674 INFO L215 NwaCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:01:10,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 06:01:10,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 06:01:10,874 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:01:10,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:01:10,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1881135043, now seen corresponding path program 10 times [2024-11-09 06:01:10,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:01:10,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738145857] [2024-11-09 06:01:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:10,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:01:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 115 proven. 415 refuted. 0 times theorem prover too weak. 1592 trivial. 0 not checked. [2024-11-09 06:01:11,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:01:11,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738145857] [2024-11-09 06:01:11,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738145857] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:01:11,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271009944] [2024-11-09 06:01:11,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:01:11,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:01:11,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:01:11,373 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:01:11,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 06:01:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:11,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 06:01:11,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:01:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 115 proven. 415 refuted. 0 times theorem prover too weak. 1592 trivial. 0 not checked. [2024-11-09 06:01:11,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:01:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 115 proven. 447 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2024-11-09 06:01:13,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271009944] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:01:13,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2044309885] [2024-11-09 06:01:13,575 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:01:13,575 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:01:13,576 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 06:01:13,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:01:13,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 23] total 25 [2024-11-09 06:01:13,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397255017] [2024-11-09 06:01:13,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:01:13,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 06:01:13,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:01:13,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 06:01:13,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2024-11-09 06:01:13,584 INFO L87 Difference]: Start difference. First operand 436 states and 630 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 16 states have call successors, (18), 1 states have call predecessors, (18), 11 states have return successors, (24), 11 states have call predecessors, (24), 16 states have call successors, (24) [2024-11-09 06:01:14,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:01:14,018 INFO L93 Difference]: Finished difference Result 497 states and 778 transitions. [2024-11-09 06:01:14,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 06:01:14,019 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 16 states have call successors, (18), 1 states have call predecessors, (18), 11 states have return successors, (24), 11 states have call predecessors, (24), 16 states have call successors, (24) Word has length 189 [2024-11-09 06:01:14,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:01:14,024 INFO L225 Difference]: With dead ends: 497 [2024-11-09 06:01:14,024 INFO L226 Difference]: Without dead ends: 473 [2024-11-09 06:01:14,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 365 SyntacticMatches, 11 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 06:01:14,027 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:01:14,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 203 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:01:14,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2024-11-09 06:01:14,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 422. [2024-11-09 06:01:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 226 states have (on average 1.0575221238938053) internal successors, (239), 221 states have internal predecessors, (239), 124 states have call successors, (124), 73 states have call predecessors, (124), 71 states have return successors, (250), 127 states have call predecessors, (250), 124 states have call successors, (250) [2024-11-09 06:01:14,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 613 transitions. [2024-11-09 06:01:14,145 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 613 transitions. Word has length 189 [2024-11-09 06:01:14,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:01:14,147 INFO L471 AbstractCegarLoop]: Abstraction has 422 states and 613 transitions. [2024-11-09 06:01:14,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 16 states have call successors, (18), 1 states have call predecessors, (18), 11 states have return successors, (24), 11 states have call predecessors, (24), 16 states have call successors, (24) [2024-11-09 06:01:14,148 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 613 transitions. [2024-11-09 06:01:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2024-11-09 06:01:14,157 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:01:14,157 INFO L215 NwaCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:01:14,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 06:01:14,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 06:01:14,361 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:01:14,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:01:14,362 INFO L85 PathProgramCache]: Analyzing trace with hash 211607927, now seen corresponding path program 11 times [2024-11-09 06:01:14,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:01:14,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380811873] [2024-11-09 06:01:14,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:14,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:01:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 254 proven. 1087 refuted. 0 times theorem prover too weak. 7431 trivial. 0 not checked. [2024-11-09 06:01:15,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:01:15,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380811873] [2024-11-09 06:01:15,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380811873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:01:15,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650456686] [2024-11-09 06:01:15,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:01:15,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:01:15,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:01:15,188 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:01:15,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 06:01:15,484 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-09 06:01:15,484 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:01:15,488 INFO L255 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 06:01:15,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:01:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 224 proven. 955 refuted. 0 times theorem prover too weak. 7593 trivial. 0 not checked. [2024-11-09 06:01:15,718 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:01:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 224 proven. 980 refuted. 0 times theorem prover too weak. 7568 trivial. 0 not checked. [2024-11-09 06:01:17,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650456686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:01:17,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [272565871] [2024-11-09 06:01:17,297 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:01:17,297 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:01:17,298 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 06:01:17,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:01:17,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 21] total 36 [2024-11-09 06:01:17,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382093802] [2024-11-09 06:01:17,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:01:17,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-09 06:01:17,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:01:17,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-09 06:01:17,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 06:01:17,302 INFO L87 Difference]: Start difference. First operand 422 states and 613 transitions. Second operand has 36 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 24 states have call successors, (27), 1 states have call predecessors, (27), 20 states have return successors, (39), 20 states have call predecessors, (39), 24 states have call successors, (39) [2024-11-09 06:01:18,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:01:18,316 INFO L93 Difference]: Finished difference Result 671 states and 1114 transitions. [2024-11-09 06:01:18,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-09 06:01:18,317 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 24 states have call successors, (27), 1 states have call predecessors, (27), 20 states have return successors, (39), 20 states have call predecessors, (39), 24 states have call successors, (39) Word has length 343 [2024-11-09 06:01:18,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:01:18,326 INFO L225 Difference]: With dead ends: 671 [2024-11-09 06:01:18,326 INFO L226 Difference]: Without dead ends: 525 [2024-11-09 06:01:18,328 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 673 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=607, Invalid=3175, Unknown=0, NotChecked=0, Total=3782 [2024-11-09 06:01:18,329 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 103 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:01:18,330 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 355 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:01:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2024-11-09 06:01:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 413. [2024-11-09 06:01:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 217 states have (on average 1.055299539170507) internal successors, (229), 213 states have internal predecessors, (229), 123 states have call successors, (123), 68 states have call predecessors, (123), 72 states have return successors, (264), 131 states have call predecessors, (264), 123 states have call successors, (264) [2024-11-09 06:01:18,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 616 transitions. [2024-11-09 06:01:18,454 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 616 transitions. Word has length 343 [2024-11-09 06:01:18,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:01:18,455 INFO L471 AbstractCegarLoop]: Abstraction has 413 states and 616 transitions. [2024-11-09 06:01:18,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 24 states have call successors, (27), 1 states have call predecessors, (27), 20 states have return successors, (39), 20 states have call predecessors, (39), 24 states have call successors, (39) [2024-11-09 06:01:18,455 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 616 transitions. [2024-11-09 06:01:18,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2024-11-09 06:01:18,463 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:01:18,464 INFO L215 NwaCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:01:18,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 06:01:18,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 06:01:18,668 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:01:18,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:01:18,669 INFO L85 PathProgramCache]: Analyzing trace with hash 247251005, now seen corresponding path program 12 times [2024-11-09 06:01:18,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:01:18,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969792515] [2024-11-09 06:01:18,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:01:18,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:01:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:01:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 154 proven. 2940 refuted. 0 times theorem prover too weak. 5700 trivial. 0 not checked. [2024-11-09 06:01:24,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:01:24,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969792515] [2024-11-09 06:01:24,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969792515] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:01:24,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618351830] [2024-11-09 06:01:24,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:01:24,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:01:24,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:01:24,912 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:01:24,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 06:01:25,293 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:01:25,293 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:01:25,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 1647 conjuncts, 339 conjuncts are in the unsatisfiable core [2024-11-09 06:01:25,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:01:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 2940 refuted. 0 times theorem prover too weak. 5854 trivial. 0 not checked. [2024-11-09 06:01:26,289 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:01:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 8644 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2024-11-09 06:01:36,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618351830] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:01:36,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1160941802] [2024-11-09 06:01:36,145 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:01:36,145 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:01:36,146 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 06:01:36,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:01:36,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 108] total 139 [2024-11-09 06:01:36,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876892152] [2024-11-09 06:01:36,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:01:36,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2024-11-09 06:01:36,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:01:36,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2024-11-09 06:01:36,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=18689, Unknown=0, NotChecked=0, Total=19182 [2024-11-09 06:01:36,157 INFO L87 Difference]: Start difference. First operand 413 states and 616 transitions. Second operand has 139 states, 104 states have (on average 1.7115384615384615) internal successors, (178), 106 states have internal predecessors, (178), 54 states have call successors, (77), 36 states have call predecessors, (77), 68 states have return successors, (91), 70 states have call predecessors, (91), 54 states have call successors, (91) [2024-11-09 06:05:11,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:11,562 INFO L93 Difference]: Finished difference Result 1274 states and 2202 transitions. [2024-11-09 06:05:11,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2024-11-09 06:05:11,563 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 104 states have (on average 1.7115384615384615) internal successors, (178), 106 states have internal predecessors, (178), 54 states have call successors, (77), 36 states have call predecessors, (77), 68 states have return successors, (91), 70 states have call predecessors, (91), 54 states have call successors, (91) Word has length 349 [2024-11-09 06:05:11,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:11,579 INFO L225 Difference]: With dead ends: 1274 [2024-11-09 06:05:11,579 INFO L226 Difference]: Without dead ends: 1270 [2024-11-09 06:05:11,623 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1253 GetRequests, 731 SyntacticMatches, 0 SemanticMatches, 522 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87563 ImplicationChecksByTransitivity, 206.8s TimeCoverageRelationStatistics Valid=37658, Invalid=236394, Unknown=0, NotChecked=0, Total=274052 [2024-11-09 06:05:11,624 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 5803 mSDsluCounter, 1909 mSDsCounter, 0 mSdLazyCounter, 8035 mSolverCounterSat, 14142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5810 SdHoareTripleChecker+Valid, 1944 SdHoareTripleChecker+Invalid, 22177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14142 IncrementalHoareTripleChecker+Valid, 8035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:11,624 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5810 Valid, 1944 Invalid, 22177 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14142 Valid, 8035 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2024-11-09 06:05:11,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2024-11-09 06:05:11,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1097. [2024-11-09 06:05:11,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 589 states have (on average 1.0492359932088284) internal successors, (618), 570 states have internal predecessors, (618), 324 states have call successors, (324), 196 states have call predecessors, (324), 183 states have return successors, (769), 330 states have call predecessors, (769), 324 states have call successors, (769) [2024-11-09 06:05:11,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1711 transitions. [2024-11-09 06:05:11,998 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1711 transitions. Word has length 349 [2024-11-09 06:05:11,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:12,000 INFO L471 AbstractCegarLoop]: Abstraction has 1097 states and 1711 transitions. [2024-11-09 06:05:12,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 104 states have (on average 1.7115384615384615) internal successors, (178), 106 states have internal predecessors, (178), 54 states have call successors, (77), 36 states have call predecessors, (77), 68 states have return successors, (91), 70 states have call predecessors, (91), 54 states have call successors, (91) [2024-11-09 06:05:12,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1711 transitions. [2024-11-09 06:05:12,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2024-11-09 06:05:12,014 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:12,014 INFO L215 NwaCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:12,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 06:05:12,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:12,218 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:05:12,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:12,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2054178505, now seen corresponding path program 13 times [2024-11-09 06:05:12,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:12,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145431267] [2024-11-09 06:05:12,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:12,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 254 proven. 1112 refuted. 0 times theorem prover too weak. 7456 trivial. 0 not checked. [2024-11-09 06:05:13,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:13,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145431267] [2024-11-09 06:05:13,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145431267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:13,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929178638] [2024-11-09 06:05:13,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:05:13,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:13,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:13,282 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:05:13,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 06:05:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:13,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 1661 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 06:05:13,754 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:05:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 254 proven. 1112 refuted. 0 times theorem prover too weak. 7456 trivial. 0 not checked. [2024-11-09 06:05:13,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:05:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 254 proven. 1162 refuted. 0 times theorem prover too weak. 7406 trivial. 0 not checked. [2024-11-09 06:05:17,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929178638] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:05:17,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [703960055] [2024-11-09 06:05:17,465 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:05:17,465 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:05:17,466 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 06:05:17,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:05:17,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 27] total 29 [2024-11-09 06:05:17,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706015374] [2024-11-09 06:05:17,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:05:17,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 06:05:17,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:17,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 06:05:17,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2024-11-09 06:05:17,470 INFO L87 Difference]: Start difference. First operand 1097 states and 1711 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 19 states have call successors, (21), 1 states have call predecessors, (21), 13 states have return successors, (29), 13 states have call predecessors, (29), 19 states have call successors, (29) [2024-11-09 06:05:18,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:18,186 INFO L93 Difference]: Finished difference Result 1264 states and 2331 transitions. [2024-11-09 06:05:18,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 06:05:18,187 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 19 states have call successors, (21), 1 states have call predecessors, (21), 13 states have return successors, (29), 13 states have call predecessors, (29), 19 states have call successors, (29) Word has length 355 [2024-11-09 06:05:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:18,206 INFO L225 Difference]: With dead ends: 1264 [2024-11-09 06:05:18,206 INFO L226 Difference]: Without dead ends: 1237 [2024-11-09 06:05:18,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 695 SyntacticMatches, 13 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 06:05:18,209 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:18,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 280 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:05:18,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2024-11-09 06:05:18,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1085. [2024-11-09 06:05:18,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 580 states have (on average 1.0482758620689656) internal successors, (608), 560 states have internal predecessors, (608), 324 states have call successors, (324), 195 states have call predecessors, (324), 180 states have return successors, (819), 329 states have call predecessors, (819), 324 states have call successors, (819) [2024-11-09 06:05:18,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 1751 transitions. [2024-11-09 06:05:18,769 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 1751 transitions. Word has length 355 [2024-11-09 06:05:18,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:18,770 INFO L471 AbstractCegarLoop]: Abstraction has 1085 states and 1751 transitions. [2024-11-09 06:05:18,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 19 states have call successors, (21), 1 states have call predecessors, (21), 13 states have return successors, (29), 13 states have call predecessors, (29), 19 states have call successors, (29) [2024-11-09 06:05:18,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 1751 transitions. [2024-11-09 06:05:18,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2024-11-09 06:05:18,785 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:18,785 INFO L215 NwaCegarLoop]: trace histogram [127, 127, 64, 63, 63, 63, 63, 63, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:18,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 06:05:18,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:18,986 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:05:18,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:18,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1562767421, now seen corresponding path program 14 times [2024-11-09 06:05:18,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:18,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492356226] [2024-11-09 06:05:18,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:18,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 35962 backedges. 537 proven. 2750 refuted. 0 times theorem prover too weak. 32675 trivial. 0 not checked. [2024-11-09 06:05:20,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:20,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492356226] [2024-11-09 06:05:20,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492356226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:20,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911070625] [2024-11-09 06:05:20,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:05:20,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:20,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:20,710 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:05:20,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 06:05:21,160 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-09 06:05:21,160 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:05:21,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-09 06:05:21,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:05:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 35962 backedges. 492 proven. 2446 refuted. 0 times theorem prover too weak. 33024 trivial. 0 not checked. [2024-11-09 06:05:21,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:05:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 35962 backedges. 492 proven. 2487 refuted. 0 times theorem prover too weak. 32983 trivial. 0 not checked. [2024-11-09 06:05:24,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911070625] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:05:24,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [236793058] [2024-11-09 06:05:24,436 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:05:24,436 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:05:24,436 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 06:05:24,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:05:24,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 25] total 42 [2024-11-09 06:05:24,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958914865] [2024-11-09 06:05:24,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:05:24,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-09 06:05:24,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:24,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-09 06:05:24,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1528, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 06:05:24,441 INFO L87 Difference]: Start difference. First operand 1085 states and 1751 transitions. Second operand has 42 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 28 states have call successors, (31), 1 states have call predecessors, (31), 24 states have return successors, (47), 24 states have call predecessors, (47), 28 states have call successors, (47) [2024-11-09 06:05:26,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:26,334 INFO L93 Difference]: Finished difference Result 2366 states and 4661 transitions. [2024-11-09 06:05:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-09 06:05:26,335 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 28 states have call successors, (31), 1 states have call predecessors, (31), 24 states have return successors, (47), 24 states have call predecessors, (47), 28 states have call successors, (47) Word has length 669 [2024-11-09 06:05:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:26,359 INFO L225 Difference]: With dead ends: 2366 [2024-11-09 06:05:26,360 INFO L226 Difference]: Without dead ends: 1576 [2024-11-09 06:05:26,367 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1400 GetRequests, 1323 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=969, Invalid=5193, Unknown=0, NotChecked=0, Total=6162 [2024-11-09 06:05:26,368 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 107 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:26,368 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 409 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:05:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2024-11-09 06:05:26,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1251. [2024-11-09 06:05:26,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 696 states have (on average 1.0660919540229885) internal successors, (742), 666 states have internal predecessors, (742), 374 states have call successors, (374), 253 states have call predecessors, (374), 180 states have return successors, (1034), 331 states have call predecessors, (1034), 374 states have call successors, (1034) [2024-11-09 06:05:26,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 2150 transitions. [2024-11-09 06:05:26,815 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 2150 transitions. Word has length 669 [2024-11-09 06:05:26,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:26,816 INFO L471 AbstractCegarLoop]: Abstraction has 1251 states and 2150 transitions. [2024-11-09 06:05:26,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 28 states have call successors, (31), 1 states have call predecessors, (31), 24 states have return successors, (47), 24 states have call predecessors, (47), 28 states have call successors, (47) [2024-11-09 06:05:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 2150 transitions. [2024-11-09 06:05:26,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2024-11-09 06:05:26,831 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:26,832 INFO L215 NwaCegarLoop]: trace histogram [127, 127, 64, 63, 63, 63, 63, 63, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:26,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 06:05:27,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 06:05:27,032 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:05:27,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:27,033 INFO L85 PathProgramCache]: Analyzing trace with hash -866850505, now seen corresponding path program 15 times [2024-11-09 06:05:27,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:27,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496652251] [2024-11-09 06:05:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:27,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:43,589 INFO L134 CoverageAnalysis]: Checked inductivity of 35990 backedges. 314 proven. 12010 refuted. 0 times theorem prover too weak. 23666 trivial. 0 not checked. [2024-11-09 06:05:43,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:43,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496652251] [2024-11-09 06:05:43,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496652251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:43,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780189751] [2024-11-09 06:05:43,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:05:43,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:43,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:43,591 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:05:43,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1034ee-28ff-4c68-9c70-5f6ab80e66c3/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 06:05:44,300 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:05:44,301 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:05:44,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 3229 conjuncts, 663 conjuncts are in the unsatisfiable core [2024-11-09 06:05:44,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:05:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 35990 backedges. 0 proven. 12010 refuted. 0 times theorem prover too weak. 23980 trivial. 0 not checked. [2024-11-09 06:05:45,893 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 35990 backedges. 0 proven. 35698 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2024-11-09 06:06:12,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780189751] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:12,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1144309738] [2024-11-09 06:06:12,953 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 06:06:12,953 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:06:12,954 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 06:06:12,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:06:12,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 206] total 243 [2024-11-09 06:06:12,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048980068] [2024-11-09 06:06:12,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:06:12,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 243 states [2024-11-09 06:06:12,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:06:12,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 243 interpolants. [2024-11-09 06:06:12,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=833, Invalid=57973, Unknown=0, NotChecked=0, Total=58806 [2024-11-09 06:06:12,968 INFO L87 Difference]: Start difference. First operand 1251 states and 2150 transitions. Second operand has 243 states, 175 states have (on average 1.7885714285714285) internal successors, (313), 190 states have internal predecessors, (313), 103 states have call successors, (142), 68 states have call predecessors, (142), 120 states have return successors, (160), 123 states have call predecessors, (160), 103 states have call successors, (160)